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Dwayne Heard

Professor of Atmospheric Chemistry
Member of the Atmospheric and Planetary Chemistry group

Contact details

Room: 1.28a
Tel: +44 (0)113 3436471
Email: D.E.Heard@leeds.ac.uk

Keywords

Atmospheric chemistry
Field measurements of hydroxyl and other radicals
Reaction kinetics and photochemistry
Aerosols and heterogeneous chemistry
Very low temperature studies of planetary and interstellar environments
Laser induced fluorescence spectroscopy
Chamber studies in HIRAC

Photograph of Dwayne Heard

Research interests

The future well-being of our atmosphere relies on a detailed understanding of the chemistry responsible for the oxidation of man-made and natural emissions. Numerical models are used to predict future changes in global warming and air quality, and drive all legislative controls on emissions. Our research aims to improve the accuracy of the chemistry contained in these models through (1) field measurements in the atmosphere of key intermediates, for example, the hydroxyl radical, OH, and other free-radicals, and comparison with model calculations. OH removes almost all trace gases, and drives much of the chemistry of the atmosphere, (2) laboratory studies of the kinetics and photochemistry of key reactions of the Earth's atmosphere, as well as those of other planets and the interstellar medium, using a variety of laser-based methods, and (3) studies of atmospheric chemistry within the HIRAC chamber under simulated conditions.

Field measurements of OH, HO2 and IO free-radicals and OH reactivity in the atmosphere on ground and airborne platforms
State-of-the-art instruments using laser-induced fluorescence spectroscopy at low pressure (FAGE) have been developed for quantitative measurement of the hydroxyl radical (OH), hydroperoxy radical HO2 and iodine oxide radical (IO), both from ground-based mobile laboratories and the NERC FAAM BAe-146 instrumented aircraft. Since 1996 we have participated in ~20 field campaigns worldwide (including Antarctica, the Arctic, Borneo, Africa, Tasmania and Cape Verde) and future campaigns are planned in a variety of chemical environments, for example in central London during the 2012 Olympics and the Western Pacific in 2011/12. Measurements are compared with calculations from a range of models, including a box model utilising the Master Chemical Mechanism, which was developed at Leeds and currently contains up to 15,000 reactions and over 5000 chemical species. The level of agreement with models is an excellent test of how well we understand the chemistry of our atmosphere for different environments. We have also developed a field instrument to measure directly the chemical reactivity of OH, a measure of the chemical complexity of the local environment. New instruments are under development for other species, for example, formaldehyde using a novel fibre laser.

Laboratory studies of chemical kinetics and photochemistry
Each reaction in an atmospheric model requires a rate coefficient and branching ratio for the products to be specified as a function of temperature and pressure, and also wavelength in the case of photochemical reactions. In the well-equipped Dainton kinetics laboratory we use laser flash-photolysis combined with a variety of laser spectroscopic probes to study the details of key chemical and photochemical atmospheric processes, many of which involve free-radicals. Using a pulsed Laval nozzle we are able to access temperatures are low as 50K which are representative of the atmosphere of other planets and moons, for example Titan, as well as the interstellar medium. Heterogeneous aerosol chemistry is also an important component of chemical models and we are measuring the uptake of radicals onto the surface of aerosols of differing size distributions and chemical composition.

Kinetic and mechanistic studies using The Leeds Highly Instrumented Reactor for Atmospheric Chemistry (HIRAC)
HIRAC enables us to study mechanistic details of the oxidative chemistry and photochemistry of our atmosphere whilst controlling the chemical composition and conditions (e.g. temperature and pressure). Using a variety of state-of-the art instruments we are able to detect both stable species and free-radicals, including OH, HO2 and NO3 radicals, and comparison with model predictions confirms our mechanistic understanding. HIRAC also provides an ideal medium in which to calibrate field instruments under realistic conditions and is a testbed to develop new instruments.

The work is supported by the National Centre for Atmospheric Science (NCAS) which is based in Leeds and funded by NERC. Much of the work is performed in collaboration with colleagues here in Chemistry and also in the School of the Environment, with whom there are a number of joint grants. Our research is highly collaborative, and we have very close links with other atmospheric groups within the University and across the wider UK and international community. Further information can be found on the links below.

Useful links

FAGE group   
Publications   
Book published   
HIRAC chamber

Publications

Winiberg FAF; Smith SC; Bejan I; Brumby CA; Ingham T; Malkin TL; Orr SC; Heard DE; Seakins PW Pressure-dependent calibration of the OH and HO2 channels of a FAGE HOx instrument using the Highly Instrumented Reactor for Atmospheric Chemistry (HIRAC) Atmospheric Measurement Techniques 8 523-540, 2015
DOI:10.5194/amt-8-523-2015
View abstract

Lewis TR; Blitz MA; Heard DE; Seakins PW Direct evidence for a substantive reaction between the Criegee intermediate, CH2OO, and the water vapour dimer PHYSICAL CHEMISTRY CHEMICAL PHYSICS 17 4859-4863, 2015
DOI:10.1039/c4cp04750h

Caravan RL; Shannon RJ; Lewis T; Blitz MA; Heard DE Measurements of Rate Coefficients for Reactions of OH with Ethanol and Propan-2-ol at Very Low Temperatures. The journal of physical chemistry. A -, 2014
DOI:10.1021/jp505790m
View abstract

Matthews PSJ; Baeza-Romero MT; Whalley LK; Heard DE Uptake of HO2 radicals onto Arizona test dust particles using an aerosol flow tube Atmospheric Chemistry and Physics 14 7397-7408, 2014
DOI:10.5194/acp-14-7397-2014
View abstract

Fittschen C; Whalley LK; Heard DE The reaction of CH3O2 radicals with OH radicals: a neglected sink for CH3O2 in the remote atmosphere. Environ Sci Technol 48 7700-7701, 2014
DOI:10.1021/es502481q

Gómez Martín JC; Caravan RL; Blitz MA; Heard DE; Plane JM Low temperature kinetics of the CH3OH + OH reaction. J Phys Chem A 118 2693-2701, 2014
DOI:10.1021/jp5002995
View abstract

Shannon RJ; Caravan RL; Blitz MA; Heard DE A combined experimental and theoretical study of reactions between the hydroxyl radical and oxygenated hydrocarbons relevant to astrochemical environments. Phys Chem Chem Phys 16 3466-3478, 2014
DOI:10.1039/c3cp54664k
View abstract

Stone D; Evans MJ; Walker H; Ingham T; Vaughan S; Ouyang B; Kennedy OJ; McLeod MW; Jones RL; Hopkins J; Punjabi S; Lidster R; Hamilton JF; Lee JD; Lewis AC; Carpenter LJ; Forster G; Oram DE; Reeves CE; Bauguitte S; Morgan W; Coe H; Aruffo E; Dari-Salisburgo C; Giammaria F; Di Carlo P; Heard DE Radical chemistry at night: Comparisons between observed and modelled HOx, NO3 and N2O5 during the RONOCO project Atmospheric Chemistry and Physics 14 1299-1321, 2014
DOI:10.5194/acp-14-1299-2014
View abstract

Whalley LK; Blitz MA; Desservettaz M; Seakins PW; Heard DE Reporting the sensitivity of laser-induced fluorescence instruments used for HO2 detection to an interference from RO2 radicals and introducing a novel approach that enables HO2 and certain RO2 types to be selectively measured Atmospheric Measurement Techniques 6 3425-3440, 2013
DOI:10.5194/amt-6-3425-2013
View abstract

Shannon RJ; Blitz MA; Goddard A; Heard DE Accelerated chemistry in the reaction between the hydroxyl radical and methanol at interstellar temperatures facilitated by tunnelling. Nat Chem 5 745-749, 2013
DOI:10.1038/nchem.1692
View abstract

George IJ; Matthews PS; Whalley LK; Brooks B; Goddard A; Baeza-Romero MT; Heard DE Measurements of uptake coefficients for heterogeneous loss of HO2 onto submicron inorganic salt aerosols. Phys Chem Chem Phys 15 12829-12845, 2013
DOI:10.1039/c3cp51831k
View abstract

Lockhart J; Blitz MA; Heard DE; Seakins PW; Shannon RJ Mechanism of the reaction of OH with alkynes in the presence of oxygen. J Phys Chem A 117 5407-5418, 2013
DOI:10.1021/jp404233b
View abstract

Salter RJ; Blitz MA; Heard DE; Pilling MJ; Seakins PW Pressure and temperature dependent photolysis of glyoxal in the 355-414 nm region: evidence for dissociation from multiple states. Phys Chem Chem Phys 15 6516-6526, 2013
DOI:10.1039/c3cp43596b
View abstract

Salter RJ; Blitz MA; Heard DE; Kovács T; Pilling MJ; Rickard AR; Seakins PW Quantum yields for the photolysis of glyoxal below 350 nm and parameterisations for its photolysis rate in the troposphere. Phys Chem Chem Phys 15 4984-4994, 2013
DOI:10.1039/c3cp43597k
View abstract

Edwards PM; Evans MJ; Furneaux KL; Hopkins J; Ingham T; Jones C; Lee JD; Lewis AC; Moller SJ; Stone D; Whalley LK; Heard DE OH reactivity in a South East Asian Tropical rainforest during the Oxidant and Particle Photochemical Processes (OP3) project Atmospheric Chemistry and Physics Discussions 13 5233-5278, 2013
DOI:10.5194/acpd-13-5233-2013
View abstract

Warwick NJ; Archibald AT; Ashworth K; Dorsey J; Edwards PM; Heard DE; Langford B; Lee J; Misztal PK; Whalley LK; Pyle JA A global model study of the impact of land-use change in Borneo on atmospheric composition Atmospheric Chemistry and Physics 13 9183-9194, 2013
DOI:10.5194/acp-13-9183-2013
View abstract

Edwards PM; Evans MJ; Furneaux KL; Hopkins J; Ingham T; Jones C; Lee JD; Lewis AC; Moller SJ; Stone D; Whalley LK; Heard DE OH reactivity in a South East Asian tropical rainforest during the oxidant and particle photochemical processes (OP3) project Atmospheric Chemistry and Physics 13 9497-9514, 2013
DOI:10.5194/acp-13-9497-2013
View abstract

Stone D; Whalley LK; Heard DE Tropospheric OH and HO2 radicals: field measurements and model comparisons. Chem Soc Rev 41 6348-6404, 2012
DOI:10.1039/c2cs35140d
View abstract

Heard DE; Saiz-Lopez A Atmospheric chemistry. Chem Soc Rev 41 6229-6230, 2012
DOI:10.1039/c2cs90076a

Vaughan S; Ingham T; Whalley LK; Stone D; Evans MJ; Read KA; Lee JD; Moller SJ; Carpenter LJ; Lewis AC; Fleming ZL; Heard DE Seasonal observations of OH and HO2 in the remote tropical marine boundary layer ATMOSPHERIC CHEMISTRY AND PHYSICS 12 2149-2172, 2012
DOI:10.5194/acp-12-2149-2012

MacDonald SM; Oetjen H; Mahajan AS; Whalley LK; Edwards PM; Heard DE; Jones CE; Plane JMC DOAS measurements of formaldehyde and glyoxal above a south-east Asian tropical rainforest Atmospheric Chemistry and Physics 12 5949-5962, 2012
DOI:10.5194/acp-12-5949-2012
View abstract

MacKenzie AR; Langford B; Pugh TA; Robinson N; Misztal PK; Heard DE; Lee JD; Lewis AC; Jones CE; Hopkins JR; Phillips G; Monks PS; Karunaharan A; Hornsby KE; Nicolas-Perea V; Coe H; Gabey AM; Gallagher MW; Whalley LK; Edwards PM; Evans MJ; Stone D; Ingham T; Commane R; Furneaux KL; McQuaid JB; Nemitz E; Seng YK; Fowler D; Pyle JA; Hewitt CN The atmospheric chemistry of trace gases and particulate matter emitted by different land uses in Borneo. Philos Trans R Soc Lond B Biol Sci 366 3177-3195, 2011
DOI:10.1098/rstb.2011.0053
View abstract

Edwards P; Evans MJ; Commane R; Ingham T; Stone D; Mahajan AS; Oetjen H; Dorsey JR; Hopkins JR; Lee JD; Moller SJ; Leigh R; Plane JMC; Carpenter LJ; Heard DE Hydrogen oxide photochemistry in the northern Canadian spring time boundary layer JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 116 -, 2011
DOI:10.1029/2011JD016390

Archibald AT; Levine JG; Abraham NL; Cooke MC; Edwards PM; Heard DE; Jenkin ME; Karunaharan A; Pike RC; Monks PS; Shallcross DE; Telford PJ; Whalley LK; Pyle JA Impacts of HOx regeneration and recycling in the oxidation of isoprene: Consequences for the composition of past, present and future atmospheres GEOPHYS RES LETT 38 -, 2011
DOI:10.1029/2010GL046520

Whalley LK; Edwards PM; Furneaux KL; Goddard A; Ingham T; Evans MJ; Stone D; Hopkins JR; Jones CE; Karunaharan A; Lee JD; Lewis AC; Monks PS; Moller SJ; Heard DE Quantifying the magnitude of a missing hydroxyl radical source in a tropical rainforest ATMOS CHEM PHYS 11 7223-7233, 2011
DOI:10.5194/acp-11-7223-2011

Commane R; Seitz K; Bale CSE; Bloss WJ; Buxmann J; Ingham T; Platt U; Pohler D; Heard DE Iodine monoxide at a clean marine coastal site: observations of high frequency variations and inhomogeneous distributions ATMOS CHEM PHYS 11 6721-6733, 2011
DOI:10.5194/acp-11-6721-2011

Mari CH; Reeves CE; Law KS; Ancellet G; Andres-Hernandez MD; Barret B; Bechara J; Borbon A; Bouarar I; Cairo F; Commane R; Delon C; Evans MJ; Fierli F; Floquet C; Galy-Lacaux C; Heard DE; Homan CD; Ingham T; Larsen N; Lewis AC; Liousse C; Murphy JG; Orlandi E; Oram DE; Saunois M; Serca D; Stewart DJ; Stone D; Thouret V; van Velthoven P; Williams JE Atmospheric composition of West Africa: highlights from the AMMA international program ATMOS SCI LETT 12 13-18, 2011
DOI:10.1002/asl.289

Stone D; Evans MJ; Stone D; Edwards PM; Commane R; Ingham T; Rickard AR; Heard DE; Ingham T; Rickard AR; Heard DE; Brookes DM; Leigh RJ; Monks PS; Hopkins J; Lewis AC; Hopkins J; Lewis AC; Oram D; Reeves CE; Stewart D; Oram D; Reeves CE; Commane R; Stewart D Isoprene oxidation mechanisms: Measurements and modelling of OH and HO over a South-East Asian tropical rainforest during the OP3 field campaign Atmospheric Chemistry and Physics Discussions 11 10343-10401, 2011
DOI:10.5194/acpd-11-10343-2011
View abstract

Commane R; Bale CSE; Ingham T; Heard DE; Seitz K; Buxmann J; Platt U; Pöhler D; Bloss WJ; Ingham T; Heard DE; Commane R Iodine monoxide at a clean marine coastal site: Observations of high frequency variations and inhomogeneous distributions Atmospheric Chemistry and Physics Discussions 11 4533-4568, 2011
DOI:10.5194/acpd-11-4533-2011
View abstract

Whalley LK; Edwards PM; Furneaux KL; Goddard A; Ingham T; Stone D; Heard DE; Whalley LK; Ingham T; Heard DE; Evans MJ; Hopkins JR; Jones CE; Lee JD; Lewis AC; Moller SJ; Hopkins JR; Lee JD; Lewis AC; Karunaharan A; Monks PS Quantifying the magnitude of a missing hydroxyl radical source in a tropical rainforest Atmospheric Chemistry and Physics Discussions 11 5785-5809, 2011
DOI:10.5194/acpd-11-5785-2011
View abstract

Archibald AT; Levine JG; Abraham NL; Cooke MC; Edwards PM; Heard DE; Jenkin ME; Karunaharan A; Pike RC; Monks PS; Shallcross DE; Telford PJ; Whalley LK; Pyle JA Impacts of HOx regeneration and recycling in the oxidation of isoprene: Consequences for the composition of past, present and future atmospheres Geophysical Research Letters 38 -, 2011
DOI:10.1029/2010GL046520
View abstract

Stone D; Evans MJ; Edwards PM; Commane R; Ingham T; Rickard AR; Brookes DM; Hopkins J; Leigh RJ; Lewis AC; Monks PS; Oram D; Reeves CE; Stewart D; Heard DE Isoprene oxidation mechanisms: measurements and modelling of OH and HO2 over a South-East Asian tropical rainforest during the OP3 field campaign ATMOS CHEM PHYS 11 6749-6771, 2011
DOI:10.5194/acp-11-6749-2011

Vaughan S; Ingham T; Whalley LK; Stone D; Heard DE; Ingham T; Whalley LK; Stone D; Evans MJ; Read KA; Carpenter LJ; Read KA; Lee JD; Moller SJ; Lewis AC; Fleming ZL Seasonal observations of OH and HO in the remote tropical marine boundary layer Atmospheric Chemistry and Physics Discussions 11 21429-21487, 2011
DOI:10.5194/acpd-11-21429-2011
View abstract

Mahajan AS; Whalley LK; Oetjen H; Furneaux KL; Goddard A; Heard DE; Plane JMC; Saiz-Lopez A; Kozlova E; Mendez L DOAS observations of formaldehyde and its impact on the HO balance in the tropical Atlantic marine boundary layer Journal of Atmospheric Chemistry 1-12, 2011
DOI:10.1007/s10874-011-9200-7
View abstract

Edwards P; Evans MJ; Commane R; Ingham T; Stone D; Mahajan AS; Oetjen H; Dorsey JR; Hopkins JR; Lee JD; Moller SJ; Leigh R; Plane JMC; Carpenter LJ; Heard DE Hydrogen oxide photochemistry in the northern Canadian spring time boundary layer Journal of Geophysical Research: Atmospheres 116 -, 2011
DOI:10.1029/2011JD016390
View abstract

Gravestock TJ; Blitz MA; Bloss WJ; Heard DE A multidimensional study of the reaction CH2I+O2: products and atmospheric implications. Chemphyschem 11 3928-3941, 2010
DOI:10.1002/cphc.201000575
View abstract

Carpenter LJ; Fleming ZL; Read KA; Lee JD; Moller SJ; Hopkins JR; Purvis RM; Lewis AC; Mueller K; Heinold B; Herrmann H; Fomba KW; van Pinxteren D; Mueller C; Tegen I; Wiedensohler A; Mueller T; Niedermeier N; Achterberg EP; Patey MD; Kozlova EA; Heimann M; Heard DE; Plane JMC; Mahajan A; Oetjen H; Ingham T; Stone D; Whalley LK; Evans MJ; Pilling MJ; Leigh RJ; Monks PS; Karunaharan A; Vaughan S; Arnold SR; Tschritter J; Poehler D; Friess U; Holla R; Mendes LM; Lopez H; Faria B; Manning AJ; Wallace DWR Seasonal characteristics of tropical marine boundary layer air measured at the Cape Verde Atmospheric Observatory JOURNAL OF ATMOSPHERIC CHEMISTRY 67 87-140, 2010
DOI:10.1007/s10874-011-9206-1

Shannon RJ; Taylor S; Goddard A; Blitz MA; Heard DE Observation of a large negative temperature dependence for rate coefficients of reactions of OH with oxygenated volatile organic compounds studied at 86-112 K. Phys Chem Chem Phys 12 13511-13514, 2010
DOI:10.1039/c0cp00918k
View abstract

Mahajan AS; Shaw M; Oetjen H; Hornsby KE; Carpenter LJ; Kaleschke L; Tian-Kunze X; Lee JD; Moller SJ; Edwards P; Commane R; Ingham T; Heard DE; Plane JMC Evidence of reactive iodine chemistry in the Arctic boundary layer J GEOPHYS RES-ATMOS 115 -, 2010
DOI:10.1029/2009JD013665

Moller SJ; Lee JD; Commane R; Edwards P; Heard DE; Hopkins J; Ingham T; Mahajan AS; Oetjen H; Plane J; Roscoe H; Lewis AC; Carpenter LJ Measurements of nitrogen oxides from Hudson Bay: Implications for NOx release from snow and ice covered surfaces ATMOS ENVIRON 44 2971-2979, 2010
DOI:10.1016/j.atmosenv.2010.05.015

Mahajan AS; Whalley LK; Kozlova E; Oetjen H; Mendez L; Furneaux KL; Goddard A; Heard DE; Plane JMC; Saiz-Lopez A DOAS observations of formaldehyde and its impact on the HOx balance in the tropical Atlantic marine boundary layer J ATMOS CHEM 66 167-178, 2010
DOI:10.1007/s10874-011-9200-7

Worton DR; Reeves CE; Penkett SA; Sturges WT; Slemr J; Oram DE; Bandy BJ; Bloss WJ; Carslaw N; Davey J; Emmerson KM; Gravestock TJ; Hamilton JF; Heard DE; Hopkins JR; Hulse A; Ingram T; Jacob MJ; Lee JD; Leigh RJ; Lewis AC; Monks PS; Smith SC Alkyl nitrate photochemistry during the tropospheric organic chemistry experiment ATMOS ENVIRON 44 773-785, 2010
DOI:10.1016/j.atmosenv.2009.11.038

Gravestock TJ; Blitz MA; Heard DE A laser induced fluorescence study relating to physical properties of the iodine monoxide radical. Phys Chem Chem Phys 12 823-834, 2010
DOI:10.1039/b910571a
View abstract

Hewitt CN; Lee JD; MacKenzie AR; Barkley MP; Carslaw N; Carver GD; Chappell NA; Coe H; Collier C; Commane R; Davies F; Davison B; Di Carlo P; Di Marco CF; Dorsey JR; Edwards PM; Evans MJ; Fowler D; Furneaux KL; Gallagher M; Guenther A; Heard DE; Helfter C; Hopkins J; Ingham T; Irwin M; Jones C; Karunaharan A; Langford B; Lewis AC; Lim SF; MacDonald SM; Mahajan AS; Malpass S; McFiggans G; Mills G; Misztal P; Moller S; Monks PS; Nemitz E; Nicolas-Perea V; Oetjen H; Oram DE; Palmer PI; Phillips GJ; Pike R; Plane JMC; Pugh T; Pyle JA; Reeves CE; Robinson NH; Stewart D; Stone D; Whalley LK; Yin X Overview: oxidant and particle photochemical processes above a south-east Asian tropical rainforest (the OP3 project): introduction, rationale, location characteristics and tools ATMOS CHEM PHYS 10 169-199, 2010

Malkin TL; Goddard A; Heard DE; Seakins PW Measurements of OH and HO2 yields from the gas phase ozonolysis of isoprene ATMOS CHEM PHYS 10 1441-1459, 2010

McFiggans G; Bale CSE; Ball SM; Beames JM; Bloss WJ; Carpenter LJ; Dorsey J; Dunk R; Flynn MJ; Furneaux KL; Gallagher MW; Heard DE; Hollingsworth AM; Hornsby K; Ingham T; Jones CE; Jones RL; Kramer LJ; Langridge JM; Leblanc C; LeCrane JP; Lee JD; Leigh RJ; Longley I; Mahajan AS; Monks PS; Oetjen H; Orr-Ewing AJ; Plane JMC; Potin P; Shillings AJL; Thomas F; von Glasow R; Wada R; Whalley LK; Whitehead JD Iodine-mediated coastal particle formation: an overview of the Reactive Halogens in the Marine Boundary Layer (RHaMBLe) Roscoff coastal study ATMOS CHEM PHYS 10 2975-2999, 2010

Pugh TAM; MacKenzie AR; Hewitt CN; Langford B; Edwards PM; Furneaux KL; Heard DE; Hopkins JR; Jones CE; Karunaharan A; Lee J; Mills G; Misztal P; Moller S; Monks PS; Whalley LK Simulating atmospheric composition over a South-East Asian tropical rainforest: performance of a chemistry box model ATMOS CHEM PHYS 10 279-298, 2010

Furneaux KL; Whalley LK; Heard DE; Atkinson HM; Bloss WJ; Flynn MJ; Gallagher MW; Ingham T; Kramer L; Lee JD; Leigh R; McFiggans GB; Mahajan AS; Monks PS; Oetjen H; Plane JMC; Whitehead JD Measurements of iodine monoxide at a semi polluted coastal location ATMOS CHEM PHYS 10 3645-3663, 2010

Whalley LK; Furneaux KL; Goddard A; Lee JD; Mahajan A; Oetjen H; Read KA; Kaaden N; Carpenter LJ; Lewis AC; Plane JMC; Saltzman ES; Wiedensohler A; Heard DE The chemistry of OH and HO2 radicals in the boundary layer over the tropical Atlantic Ocean ATMOS CHEM PHYS 10 1555-1576, 2010

Stone D; Evans MJ; Commane R; Ingham T; Floquet CFA; McQuaid JB; Brookes DM; Monks PS; Purvis R; Hamilton JF; Hopkins J; Lee J; Lewis AC; Stewart D; Murphy JG; Mills G; Oram D; Reeves CE; Heard DE HOx observations over West Africa during AMMA: Impact of isoprene and NOx Atmospheric Chemistry and Physics 10 9415-9429, 2010
DOI:10.5194/acp-10-9415-2010
View abstract

Andrés-Hernández MD; Burrows JP; Kartal D; Stone D; Commane R; Heard DE; Floquet CFA; Ingham T; Stone D; Evans MJ; Brookes DM; Monks PS; Parker AE; Reeves CE; Huntrieser H; Schlager H; Heard DE; Ingham T; Methven J; Commane R Peroxy radical partitioning during the AMMA radical intercomparison exercise Atmospheric Chemistry and Physics Discussions 10 8447-8486, 2010
View abstract

Bloss WJ; Camredon M; Lee JD; Heard DE; Plane JMC; Heard DE; Plane JMC; Saiz-Lopez A; J-B Bauguitte S; Salmon RA; Jones AE Coupling of HO, NO and halogen chemistry in the Antarctic boundary layer Atmospheric Chemistry and Physics Discussions 10 15109-15165, 2010
DOI:10.5194/acpd-10-15109-2010
View abstract

Hewitt CN; Lee JD; MacKenzie AR; Barkley MP; Carslaw N; Carver GD; Chappell NA; Coe H; Collier C; Commane R; Davies F; Davison B; DiCarlo P; Di Marco CF; Dorsey JR; Edwards PM; Evans MJ; Fowler D; Furneaux KL; Gallagher M; Guenther A; Heard DE; Helfter C; Hopkins J; Ingham T; Irwin M; Jones C; Karunaharan A; Langford B; Lewis AC; Lim SF; MacDonald SM; Mahajan AS; Malpass S; McFiggans G; Mills G; Misztal P; Moller S; Monks PS; Nemitz E; Nicolas-Perea V; Oetjen H; Oram DE; Palmer PI; Phillips GJ; Pike R; Plane JMC; Pugh T; Pyle JA; Reeves CE; Robinson NH; Stewart D; Stone D; Whalley LK; Yang X Erratum: Overview: Oxidant and particle photochemical processes above a south-east Asian tropical rainforest (the OP3 project): Introduction, rationale, location characteristics and tools (Atmospheric Chemistry and Physics (2010) 10 (169-199)) Atmospheric Chemistry and Physics 10 563-563, 2010

Mahajan AS; Shaw M; Oetjen H; Hornsby KE; Carpenter LJ; Kaleschke L; Tian-Kunze X; Lee JD; Moller SJ; Edwards P; Commane R; Ingham T; Heard DE; Plane JMC Evidence of reactive iodine chemistry in the Arctic boundary layer Journal of Geophysical Research: Atmospheres 115 -, 2010
DOI:10.1029/2009JD013665
View abstract

Andres-Hernandez MD; Stone D; Brookes DM; Commane R; Reeves CE; Huntrieser H; Heard DE; Monks PS; Burrows JP; Schlager H; Kartal D; Evans MJ; Floquet CFA; Ingham T; Methven J; Parker AE Peroxy radical partitioning during the AMMA radical intercomparison exercise ATMOS CHEM PHYS 10 10621-10638, 2010
DOI:10.5194/acp-10-10621-2010

Bloss WJ; Camredon M; Lee JD; Heard DE; Plane JMC; Saiz-Lopez A; Bauguitte SJB; Salmon RA; Jones AE Coupling of HOx, NOx and halogen chemistry in the antarctic boundary layer ATMOS CHEM PHYS 10 10187-10209, 2010
DOI:10.5194/acp-10-10187-2010

Commane R; Floquet CFA; Ingham T; Stone D; Evans MJ; Heard DE Observations of OH and HO2 radicals over West Africa ATMOS CHEM PHYS 10 8783-8801, 2010
DOI:10.5194/acp-10-8783-2010

Hewitt CN; Lee JD; MacKenzie AR; Barkley MP; Carslaw N; Carver GD; Chappell NA; Coe H; Collier C; Commane R; Davies F; Davison B; Di Carlo P; Di Marco CF; Dorsey JR; Edwards PM; Evans MJ; Fowler D; Furneaux KL; Gallagher M; Guenther A; Heard DE; Helfter C; Hopkins J; Ingham T; Irwin M; Jones C; Karunaharan A; Langford B; Lewis AC; Lim SF; MacDonald SM; Mahajan AS; Malpass S; McFiggans G; Mills G; Misztal P; Moller S; Monks PS; Nemitz E; Nicolas-Perea V; Oetjen H; Oram DE; Palmer PI; Phillips GJ; Pike R; Plane JMC; Pugh T; Pyle JA; Reeves CE; Robinson NH; Stewart D; Stone D; Whalley LK; Yang X Overview: oxidant and particle photochemical processes above a south-east Asian tropical rainforest (the OP3 project): introduction, rationale, location characteristics and tools (vol 10, pg 169, 2010) ATMOS CHEM PHYS 10 563-563, 2010

Lee JD; McFiggans G; Allan JD; Baker AR; Ball SM; Benton AK; Carpenter LJ; Commane R; Finley BD; Evans M; Fuentes E; Furneaux K; Goddard A; Good N; Hamilton JF; Heard DE; Herrmann H; Hollingsworth A; Hopkins JR; Ingham T; Irwin M; Jones CE; Jones RL; Keene WC; Lawler MJ; Lehmann S; Lewis AC; Long MS; Mahajan A; Methven J; Moller SJ; Muller K; Muller T; Niedermeier N; O'Doherty S; Oetjen H; Plane JMC; Pszenny AAP; Read KA; Saiz-Lopez A; Saltzman ES; Sander R; von Glasow R; Whalley L; Wiedensohler A; Young D Reactive Halogens in the Marine Boundary Layer (RHaMBLe): the tropical North Atlantic experiments ATMOS CHEM PHYS 10 1031-1055, 2010

Hewitt CN; Lee JD; MacKenzie AR; Barkley MP; Carslaw N; Carver GD; Chappell NA; Coe H; Collier C; Commane R; Davies F; Davison B; DiCarlo P; Di Marco CF; Dorsey JR; Edwards PM; Evans MJ; Fowler D; Furneaux KL; Gallagher M; Guenther A; Heard DE; Helfter C; Hopkins J; Ingham T; Irwin M; Jones C; Karunaharan A; Langford B; Lewis AC; Lim SF; MacDonald SM; Mahajan AS; Malpass S; McFiggans G; Mills G; Misztal P; Moller S; Monks PS; Nemitz E; Nicolas-Perea V; Oetjen H; Oram DE; Palmer PI; Phillips GJ; Pike R; Plane JMC; Pugh T; Pyle JA; Reeves CE; Robinson NH; Stewart D; Stone D; Whalley LK; Yang X Erratum: Overview: Oxidant and particle photochemical processes above a south-east Asian tropical rainforest (the OP3 project): Introduction, rationale, location characteristics and tools (Atmospheric Chemistry and Physics (2010) 10 (169-199)) Atmospheric Chemistry and Physics 10 563-563, 2010

Stone D; Evans MJ; Commane R; Ingham T; Floquet CFA; McQuaid JB; Brookes DM; Monks PS; Purvis R; Hamilton JF; Hopkins J; Lee J; Lewis AC; Stewart D; Murphy JG; Mills G; Oram D; Reeves CE; Heard DE HOx observations over West Africa during AMMA: Impact of isoprene and NOx Atmos. Chem. Phys. 10 9415-9429, 2010
DOI:10.5194/acp-10-9415-2010
View abstract

Lee JD; Young JC; Read KA; Hamilton JF; Hopkins JR; Lewis AC; Bandy BJ; Davey J; Edwards P; Ingham T; Self DE; Smith SC; Pilling MJ; Heard DE Measurement and calculation of OH reactivity at a United Kingdom coastal site J ATMOS CHEM 64 53-76, 2009
DOI:10.1007/s10874-010-9171-0

Salter RJ; Blitz MA; Heard DE; Pilling MJ; Seakins PW New chemical source of the HCO radical following photoexcitation of glyoxal, (HCO)2. J Phys Chem A 113 8278-8285, 2009
DOI:10.1021/jp9030249
View abstract

McFiggans GB; Ball SM; Carpenter LJ; Gallagher MW; Heard DE; Plane JMC Novel findings in the Reactive Halogens in the Marine Boundary Layer (RHaMBLe) project, 2009

Carr S; Heard DE; Blitz MA Comment on "Atmospheric hydroxyl radical production from electronically excited NO2 and H2O". Science 324 336-, 2009
DOI:10.1126/science.1166669
View abstract

Heard DE OH and HO2 radical chemistry in the atmosphere: Field measurements, modeling and chamber studies ABSTR PAP AM CHEM S 237 258-258, 2009

Whalley LK; Furneaux KL; Goddard A; Mahajan A; Oetjen H; Plane JMC; Heard DE; Lee JD; Read KA; Carpenter LJ; Lewis AC; Kaaden N; Wiedensohler A; Saltzman ES The chemistry of OH and HO radicals in the boundary layer over the tropical Atlantic Ocean Atmospheric Chemistry and Physics Discussions 9 15959-16009, 2009
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Furneaux KL; Whalley LK; Heard DE; Atkinson HM; Bloss WJ; Ingham T; Mahajan AS; Oetjen H; Plane JMC; Flynn MJ; Gallagher MW; McFiggans GB; Whitehead JD; Kramer L; Leigh R; Monks PS; Lee JD; Whalley LK; Ingham T; Lee JD; Atkinson HM; Bloss WJ; Kramer L Measurements of iodine monoxide at a semi polluted coastal location Atmospheric Chemistry and Physics Discussions 9 25737-25797, 2009
View abstract

Ingham T; Goddard A; Whalley LK; Furneaux KL; Edwards PM; Seal CP; Self DE; Johnson GP; Read KA; Lee JD; Heard DE A flow-tube based laser-induced fluorescence instrument to measure OH reactivity in the troposphere ATMOS MEAS TECH 2 465-477, 2009

Ingham T; Goddard A; Whalley LK; Furneaux KL; Edwards PM; Seal CP; Self DE; Johnson GP; Read KA; Lee JD; Heard DE A flow-tube based laser-induced fluorescence instrument to measure OH reactivity in the troposphere Atmospheric Measurement Techniques 2 465-477, 2009
View abstract

Gravestock TJ; Blitz MA; Heard DE A kinetic and spectroscopic study of the CH3I-Cl and ICH2I-Cl adducts J PHYS CHEM A 112 9544-9554, 2008
DOI:10.1021/jp800372c

Read KA; Mahajan AS; Carpenter LJ; Evans MJ; Faria BVE; Heard DE; Hopkins JR; Lee JD; Moller SJ; Lewis AC; Mendes L; McQuaid JB; Oetjen H; Saiz-Lopez A; Pilling MJ; Plane JMC Extensive halogen-mediated ozone destruction over the tropical Atlantic Ocean NATURE 453 1232-1235, 2008
DOI:10.1038/nature07035

Bohn B; Dorn H-P; Corlett GK; Monks PS; Gillmann M; Sanghavi S; Platt U; Stange G; Tensing E; Plass-Dülmer C; Vrekoussis M; Mihalopoulos N; Bloss WJ; Heard DE; Clapp LJ; Clemitshaw KC; Kortner M; Meixner FX; Prevot ASH; Schmitt R; Gillmann M; Vrekoussis M; Bloss WJ; Kortner M; Clemitshaw KC Photolysis frequency measurement techniques: Results of a comparison within the ACCENT project Atmospheric Chemistry and Physics Discussions 8 10301-10352, 2008
View abstract

Bale CSE; Ingham T; Commane R; Heard DE; Bloss WJ Novel measurements of atmospheric iodine species by resonance fluorescence J ATMOS CHEM 60 51-70, 2008
DOI:10.1007/s10874-008-9108-z

Glowacki DR; Baeza-Romero MT; Blitz MA; Heard DE; Seakins PW; Pilling MJ PHYS 61-Combined experimental and theoretical study of Methylglyoxal plus OH: Atmospheric implications, 2008

Heard DE PHYS 57-Measurements of free-radicals in the atmosphere using laser-induced fluorescence spectroscopy ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY 235 -, 2008

Wang LM; Heard DE; Pilling MJ; Seakins P A Gaussian-3X prediction on the enthalpies of formation of chlorinated Phenols and dibenzo-p-dioxins J PHYS CHEM A 112 1832-1840, 2008
DOI:10.1021/jp077478a

Taylor SE; Goddard A; Blitz MA; Cleary PA; Heard DE Pulsed Laval nozzle study of the kinetics of OH with unsaturated hydrocarbons at very low temperatures. Phys Chem Chem Phys 10 422-437, 2008
DOI:10.1039/b711411g
View abstract

Bryant DE; Gorrell IB; Greenfield D; Evans SM; Wang L; Heard DE; Blitz MA; Goddard A; Smith C; Pasek MA; Kee TP Phosphorus redox chemistry in planetary environments: implications for the origins of life INT J ASTROBIOL 7 66-67, 2008

Bohn B; Corlett GK; Gillmann M; Sanghavi S; Stange G; Tensing E; Vrekoussis M; Bloss WJ; Clapp LJ; Kortner M; Dorn HP; Monks PS; Platt U; Plass-Dulmer C; Mihalopoulos N; Heard DE; Clemitshaw KC; Meixner FX; Prevot ASH; Schmitt R Photolysis frequency measurement techniques: results of a comparison within the ACCENT project ATMOS CHEM PHYS 8 5373-5391, 2008

Jones AE; Wolff EW; Salmon RA; Bauguitte SJ-B; Roscoe HK; Anderson PS; Ames D; Clemitshaw KC; Fleming ZL; Bloss WJ; Heard DE; Lee JD; Read KA; Plane JMC; Hamer P; Shallcross DE; Jackson A; Walker S; Lee JD; Read KA; Lewis AC; Mills GP; Plane JMC; Saiz-Lopez A; Sturges WT; Worton DR; Clemitshaw KC; Fleming ZL; Bloss WJ; Saiz-Lopez A; Worton DR Chemistry of the antarctic boundary layer and the interface with snow: An overview of the CHABLIS campaign Atmospheric Chemistry and Physics Discussions 8 5137-5181, 2008
View abstract

Read KA; Lewis AC; Lee JD; Bauguitte S; Rankin AM; Salmon RA; Wolff EW; Saiz-Lopez A; Bloss WJ; Heard DE; Plane JMC DMS and MSA measurements in the Antarctic boundary layer: Impact of BrO on MSA production Atmospheric Chemistry and Physics Discussions 8 2657-2694, 2008
View abstract

Read KA; Lewis AC; Bauguitte S; Rankin AM; Salmon RA; Wolff EW; Saiz-Lopez A; Bloss WJ; Heard DE; Lee JD; Plane JMC DMS and MSA measurements in the Antarctic Boundary Layer: Impact of BrO on MSA production ATMOS CHEM PHYS 8 2985-2997, 2008

Saiz-Lopez A; Plane JMC; Mahajan AS; Anderson P; Bauguitte SJB; Jones AE; Roscoe HK; Salmon RA; Bloss W; Lee JDL; Heard DE On the vertical distribution of boundary layer halogens over coastal Antarctica: implications for O-3, HOx, NOx and the Hg lifetime Atmospheric Chemistry and Physics 8 887-900, 2008

Bale CSE; Ingham T; Commane R; Heard DE; Bloss WJ Novel measurements of atmospheric iodine species by resonance fluorescence Journal of Atmospheric Chemistry 1-20, 2008

Heard DE Field Masurements of Atmospheric Composition, 2007
DOI:10.1002/9780470988510.ch1

Glowacki DR; Goddard A; Hemavibool K; Malkin TL; Commane R; Anderson F; Bloss W; Heard DE; Ingham T; Pilling MJ; Seakins PW Design of and initial results from a Highly Instrumented Reactor for Atmospheric Chemistry (HIRAC) Atmospheric Chemistry and Physics 7 5371-5390, 2007

Carr SA; Baeza-Romero MT; Blitz MA; Pilling MJ; Heard DE; Seakins PW OH yields from the CH3CO+O-2 reaction using an internal standard CHEM PHYS LETT 445 108-112, 2007
DOI:10.1016/j.cplett.2007.07.099

Whalley LK; Furneaux KL; Gravestock T; Atkinson HM; Bale C; Ingham T; Bloss WJ; Heard DE Detection of iodine monoxide radicals in the marine broundary layer using laser induced fluorescence spectroscopy Journal of Atmospheric Chemistry 58 19-39, 2007

Lewis AC; Evans MJ; Methven J; Watson N; Lee JD; Hopkins JR; Purvis RM; Arnold SR; McQuaid JB; Whalley LK; Pilling MJ; Heard DE; Monks PS; Parker AE; Reeves CE; Oram DE; Mills G; Bandy BJ; Stewart D; Coe H; Williams P; Crosier J Chemical composition observed over the mid-Atlantic and the detection of pollution signatures far from source regions Journal of Geophysical Research: Atmospheres 112 -, 2007
DOI:10.1029/2006JD007584
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Baeza Romero MT; Glowacki DR; Blitz M; Heard DE; Pilling MJ; Rickard AR; Seakins PW A combined experimental and theoretical study of the reaction between methylglyoxal and OH/OD radical: OH regeneration Physical Chemistry, Chemical Physics: a journal of European Chemical Societies 9 4114-4128, 2007
DOI:10.1039/b702916k
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Sommariva R; Pilling MJ; Bloss WJ; Heard DE; Lee JD; Fleming ZL; Monks PS; Plane JMC; Saiz-Lopez A; Ball SM; Bitter M; Jones RL; Brough N; Penkett SA; Hopkins JR; Lewis AC; Read KA Night-time radical chemistry during the NAMBLEX campaign ATMOS CHEM PHYS 7 587-598, 2007

Lewis AC; Evans MJ; Methven J; Watson N; Lee JD; Hopkins JR; Purvis RM; Arnold SR; McQuaid JB; Whalley LK; Pilling MJ; Heard DE; Monks PS; Parker A; Reeves CE; Oram DE; Mills G; Bandy BJ; Coe H Chemical composition observed over the mid-Atlantic and the detection of pollution signatures far from source regions Journal of Geophysical Research - Atmospheres 112 pp.D10S38-, 2007
DOI:10.1029/2006JD007584
View abstract

Simpson WR; von Glasow R; Riedel K; Anderson P; Ariya P; Bottenheim J; Burrows J; Carpenter LJ; Friess U; Goodsite ME; Heard DE; Hutterli M; Jacobi HW; Kaleschke L; Neff B; Plane JMC; Platt U; Richter A; Roscoe H; Sander R; Shepson P; Sodeau JR; Steffen A; Wagner T; Wolff EW Halogens and their role in polar boundary-layer ozone depletion Atmospheric Chemistry and Physics 7 4375-4418, 2007

Emmerson K; Carslaw N; Carslaw DC; Lee JD; McFiggans G; Bloss WJ; Gravestock T; Heard DE; Hopkins J; Ingham T; Pilling MJ; Smith SC; Jacob M; Monks PS Free radical modelling studies during the UK TORCH Campaign in Summer 2003 Atmospheric Chemistry and Physics 7 167-181, 2007

Bloss W; Lee JD; Heard DE; Salmon RA; Bauguitte SJB; Roscoe HK; Jones AE Observations of OH and HO2 radicals in coastal Antarctica Atmospheric Chemistry and Physics 7 4171-4185, 2007

Grannas AM; Jones AE; Dibb J; Ammann M; Anastasio C; Beine HJ; Bergin M; Bottenheim J; Boxe CS; Carver G; Chen G; Crawford JH; Domine F; Frey MM; Guzman MI; Heard DE; Helmig D; Hoffmann MR; Honrath RE; Huey LG; Hutterli M; Jacobi HW; Klan P; Lefer B; McConnell J; Plane J; Sander R; Savarino J; Shepson PB; Simpson WR; Sodeau JR; von Glasow R; Weller R; Wolff EW; Zhu T An overview of snow photochemistry: evidence, mechanisms and impacts ATMOS CHEM PHYS 7 4329-4373, 2007

Saiz-Lopez A; Plane JMC; Mahajan AS; Anderson PS; Bauguitte SJB; Jones AE; Roscoe HK; Salmon RA; Bloss W; Lee JD; Heard DE On the vertical distribution of boundary layer halogens over coastal Antarctica: implications of O3HOx and the Hg lifetime Atmospheric Chemistry and Physics Discussions 7 9385-9417, 2007

Bloss WJ; Lee JD; Heard DE; Salmon RA; Bauguitte SJ-B; Roscoe HK; Jones AE; Bloss WJ; Lee JD Observations of OH and HO radicals in coastal Antarctica Atmospheric Chemistry and Physics Discussions 7 2893-2935, 2007
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Grannas AM; Jones AE; Hutterli M; Wolff EW; Dibb J; Ammann M; Anastasio C; Beine HJ; Bergin M; Bottenheim J; Boxe CS; Guzmán MI; Hoffmann MR; Carver G; Chen G; Crawford JH; Dominé F; Frey MM; Savarino J; Frey MM; Guzmán MI; Heard DE; Plane J; Helmig D; Honrath RE; Huey LG; Jacobi HW; Weller R; Klán P; McConnell J; Sander R; Shepson PB; Simpson WR; Sodeau JR; Von Glasow R; Von Glasow R; Zhu T; Lefer B An overview of snow photochemistry: Evidence, mechanisms and impacts Atmospheric Chemistry and Physics Discussions 7 4165-4283, 2007
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Glowacki DR; Goddard A; Hemavibool K; Malkin TL; Commane R; Anderson F; Bloss WJ; Heard DE; Ingham T; Pilling MJ; Seakins PW; Bloss WJ Design of and initial results from a highly instrumented reactor for atmospheric chemistry (HIRAC) Atmospheric Chemistry and Physics Discussions 7 10687-10742, 2007
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Fleming ZL; Monks PS; Rickard AR; Heard DE; Bloss WJ; Seakins PW; Still TJ; Sommariva R; Pilling MJ; Morgan R; Green TJ; Brough N; Mills GP; Penkett SA; Lewis AC; Lee JD; Saiz-Lopez A; Plane JMC Peroxy radical chemistry and the control of ozone photochemistry at Mace Head, Ireland during the summer of 2002 ATMOS CHEM PHYS 6 2193-2214, 2006

Heard DE; Read KA; Methven J; Al Haider S; Bloss W; Johnson GP; Pilling MJ; Seakins PW; Smith SC; Sommariva R; Stanton J; Still T; Ingham T; Brooks BJ; de Leeuw G; Jackson AV; McQuaid JB; Morgan R; Smith MH; Carpenter LJ; Carslaw N; Hamilton JF; Hopkins JR; Lee JD; Lewis AC; Purvis RM; Wevill DJ; Brough N; Green TJ; Mills GP; Penkett SA; Plane JMC; Saiz-Lopez A; Worton D; Monks PS; Fleming ZL; Rickard AR; Alfarra M; Allan JD; Bower K; Coe H; Cubison M; Flynn M; McFiggans G; Gallagher MW; Norton EG; O'Dowd CD; Shillito J; Topping D; Vaughan G; Williams P; Bitter M; Ball SM; Jones RL; Povey IM; O'Doherty S; Simmonds PG; Allen A; Kinnersley RP; Dall'Osto M; Harrison RM; Donovan RJ; Heal MR; Jennings SG; Noone C; Beddows DCS; Spain G The North Atlantic Marine Boundary Layer Experiment (NAMBLEX). Overview of the Campaign held at Mace Head, Ireland, in Summer 2002 Atmospheric Chemistry and Physics Discussions 6 2241-2272, 2006

Dillon TJ; Blitz MA; Heard DE Determination of the rate coefficients for the reactions IO+NO2+M(Air)->+IONO2+M and O(P-3)+NO2 ->O-2+NO using laser-induced fluorescence spectroscopy J PHYS CHEM A 110 6995-7002, 2006
DOI:10.1021/jp057048p

Blitz M; Heard DE; Pilling MJ Study of acetone photodissociation over the wavelength range 248-330 nm: Evidence of a mechanism involving both the singlet and triplet excited states Journal of Physical Chemistry A 110 6742-6756, 2006

Harrison RM; Yin J; Tilling RM; Cai X; Seakins PW; Hopkins JR; Lansley DL; Lewis AC; Hunter MC; Heard DE; Carpenter LJ; Creasy DJ; Lee JD; Pilling MJ; Carslaw N; Emmerson KM; Redington A; Derwent RG; Ryall D; Mills G; Penkett SA Measurement and modelling of air pollution and atmospheric chemistry in the UK West Midlands conurbation: Overview of the PUMA Consortium project SCI TOTAL ENVIRON 360 5-25, 2006
DOI:10.1016/j.scitotenv.2005.08.053

Smith SC; Lee JDL; Bloss W; Johnson GP; Ingham T; Heard DE Concentrations of OH and HO2radicals during NAMBLEX: measurements and steady state analysis Atmospheric Chemistry and Physics 6 1435-1453, 2006

Sommariva R; Bloss WJ; Brough N; Carslaw N; Flynn M; Haggerstone AL; Heard DE; Hopkins JR; Lee JD; Lewis AC; McFiggans G; Monks PS; Penkett SA; Pilling MJ; Plane JMC; Read KA; Saiz-Lopez A; Rickard AR; Williams PI OH and HO2 chemistry during NAMBLEX: roles of oxygenates, halogen oxides and heterogeneous uptake ATMOS CHEM PHYS 6 1135-1153, 2006

Gorrell IB; Wang LM; Marks AJ; Bryant DE; Bouillot F; Goddard A; Heard DE; Kee TP On the origin of the Murchison meteorite phosphonates. Implications for pre-biotic chemistry Chemical Communications 15 1643-1645, 2006
DOI:10.1039/b517497j

Emmerson KM; Carslaw N; Carslaw DC; Lee JDL; McFiggans G; Bloss W; Gravestock T; Heard DE; Hopkins J; Ingham T; Pilling MJ; Smith SC; Jacob MJ; Monks PS Free radical modelling studies during the UK TORCH Campaign in summer 2003 Atmospheric Chemistry and Physics Discussions 6 10523-10565, 2006

Heard DE Atmospheric field measurements of the hydroxyl radical using laser-induced fluorescence spectroscopy. Annu Rev Phys Chem 57 191-216, 2006
DOI:10.1146/annurev.physchem.57.032905.104516
View abstract

Heard DE Analytical techniques for atmospheric measurement, 2006

Sommariva R; Pilling MJ; Bloss W; Heard DE; Lee JDL; Fleming ZL; Monks PS; Plane JMC; Saiz-Lopez A; Ball SM; Bitter M; Jones RL; Brough N; Penkett SA; Hopkins JR; Lewis AC; Read K Night-time radical chemistry during the NAMBLEX campaign Atmospheric Chemistry and Physics Discussions 6 7715-7745, 2006

Gorrell IB; Wang LM; Marks AJ; Bryant DE; Bouillot F; Goddard A; Heard DE; Kee TP On the origin of the Murchison meteorite phosphonates. Implications for pre-biotic chemistry CHEM COMMUN 1643-1645, 2006

Self DE; Plane JMC; Heard DE Kinetic study of the reactions of the sodium dimer (Na-2) with a range of atmospheric species PHYS CHEM CHEM PHYS 8 3104-3115, 2006
DOI:10.1039/b604305d

Lee JDL; Lewis AC; Monks PS; Jacob M; Hamilton JF; Hopkins JR; Watson N; Saxton J; Ennis C; Carpenter LJ; Carslaw N; Fleming ZL; Bandy BJ; Oram DE; Penkett SA; Slemr J; Norton E; Rickard AR; Whalley LK; Heard DE; Bloss W; Gravestock T; Smith S; Stanton J; Pilling MJ; Jenkin ME; Bower K; Coe H; Cryer D; Emmerson KM; Gallagher M; Ingham T; Johnson D; Johnson G; McFiggans G; McQuaid JB; Mills G; Seakins PW; Utembe S; Vaughan G Ozone photochemistry and elevated isoprene during the U.K. heat wave of August 2003 Atmospheric Environment 40 7598-7613, 2006

Cleary PA; Romero MTB; Blitz MA; Heard DE; Pilling MJ; Seakins PW; Wang L Determination of the temperature and pressure dependence of the reaction OH+C2H4 from 200-400 K using experimental and master equation analyses PHYS CHEM CHEM PHYS 8 5633-5642, 2006
DOI:10.1039/b612127f

Fleming ZL; Monks PS; Rickard AR; Heard DE; Bloss W; Seakins PW; Sommariva R; Pilling MJ; Morgan R; Green TJ; Brough N; Mills GP; Penkett SA; Lee JDL; Saiz-Lopez A; Plane JMC Peroxy radical chemistry and the control of ozone photochemistry at Mace Head, Ireland, Summer of 2002 Atmospheric Chemistry and Physics Discussions 5 12313-12371, 2005

Smith SC; Lee JDL; Bloss W; Johnson GP; Heard DE Concentrations of OH and HO2radicals during NAMBLEX: Measurements and steady-state analysis Atmospheric Chemistry and Physics Discussions 5 12403-12464, 2005

Emmerson KM; Carslaw N; Carpenter LJ; Heard DE; Lee JD; Pilling MJ Urban atmospheric chemistry during the PUMA campaign 1: Comparison of modelled OH and HO2 concentrations with measurements J ATMOS CHEM 52 143-164, 2005
DOI:10.1007/s10874-005-1322-3

Baeza Romero MT; Blitz M; Heard DE; Pilling MJ; Price BS; Seakins PW OH formation from C2H5CO+O2reaction: An experimental marker for the propionyl radical Chemical Physics Letters 408 232-236, 2005
DOI:10.1016/j.cplett.2005.04.018

Bloss W; Evans MJ; Lee JDL; Sommariva R; Heard DE; Pilling MJ The oxidative capacity of the troposphere: Coupling of field measurements of OH and a global chemistry transport model Faraday Discussions 130 425-436, 2005
DOI:10.1039/b419090d

Bloss W; Lee JD; Johnson GP; Sommariva R; Heard DE; Saiz-Lopez A; Plane JMC; McFiggans G; Coe H; Flynn M; Williams P; Rickard AR; Fleming ZL Impact of halogen monoxide chemistry upon boundary layer OH and HO2 concentrations at a coastal site Geophysical Research Letters 32 pp.L06814-, 2005
DOI:10.1029/2004GL022084

Bloss C; Wagner V; Jenkin ME; Volkamer R; Bloss W; Lee JDL; Heard DE; Wirtz K; Martin-Reviejo M; Rea G; Wenger JC; Pilling MJ Development of a detailed chemical mechanism (MCMV3.1) for the atmospheric oxidation of aromatic hydrocarbons Atmospheric Chemistry and Physics 5 641-664, 2005

Gravestock T; Blitz MA; Heard DE Kinetics study of the reaction of iodine monoxide radicals with dimethyl sulfide PHYS CHEM CHEM PHYS 7 2173-2181, 2005

Emmerson KM; Carslaw N; Carpenter LJ; Heard DE; Lee JDL; Pilling MJ Urban Atmospheric Chemistry During the PUMA Campaign 1: Comparison of modelled OH and HO2 concentrations with measurements Journal of Atmospheric Chemistry 52 142-164, 2005

Blitz M; Heard DE; Pilling MJ Wavelength dependent photodissociation of CH300H - Quantum yields for CH30 and OH, and measurement of the OH + CH(3)OOHrate coefficient Journal of Photochemistry and Photobiology, A: Chemistry 176 107-113, 2005
DOI:10.1016/j.jphotochem.2005.09.017

Romero MTB; Blitz MA; Heard DE; Pilling MJ; Price B; Seakins PW; Wang LM Photolysis of methylethyl, diethyl and methylvinyl ketones and their role in the atmospheric HOx budget FARADAY DISCUSS 130 73-88, 2005
DOI:10.1039/b419160a

Heard DE; Carpenter LJ; Creasey DJ; Hopkins JR; Lee JDL; Lewis AC; Pilling MJ; Seakins PW; Carslaw N; Emmerson KM High levels of the hydroxyl radical in the winter urban troposphere Geophysical Research Letters 31 pp.L18112-, 2004
DOI:10.1029/2004GL020544

Sommariva R; Haggerstone AL; Carpenter LJ; Carslaw N; Creasey DJ; Heard DE; Lee JD; Lewis AC; Pilling MJ; Zador J OH and HO2 chemistry in clean marine air during SOAPEX-2 ATMOS CHEM PHYS 4 839-856, 2004

Blitz M; Heard DE; Pilling MJ; Arnold SR; Chipperfield MP Pressure and temperature-dependent quantum yields for the photodissociation of acetone between 279 and 327.5 nm Geophysical Research Letters 31 pp.L06111-, 2004
DOI:10.1029/2003GL018793

Blitz M; Dillon T; Heard DE; Pilling MJ; Trought ID Laser induced flourescence studies of the reactions of O(D-1(2)) with N-2, 0-2, N2O, CH4, H-2, CO2, Ar, Kr and n-C4H10 Physical Chemistry, Chemical Physics: a journal of European Chemical Societies 6 2162-2171, 2004

Bloss WJ; Lee JD; Bloss C; Heard DE; Pilling MJ; Wirtz K; Martin-Reviejo M; Siese M Validation of the calibration of a laser-induced fluorescence instrument for the measurement of OH radicals in the atmosphere ATMOS CHEM PHYS 4 571-583, 2004

Arnold SR; Chipperfield MP; Blitz M; Heard DE; Pilling MJ Photodissociation of acetone: Atmospheric implications of temperature-dependent quantum yields Geophysical Research Letters 31 pp.L07110-, 2004
DOI:10.1029/2003GL019099

Heard DE; Carpenter LJ; Creasey DJ; Hopkins JR; Lee JD; Lewis AC; Pilling MJ; Seakins PW; Carslaw N; Emmerson K High levels of the hydroxyl radical in the winter urban troposphere Geophysical Research Letters 31 pp.L18112-, 2004
DOI:10.1029/2004GL020544

Bloss C; Wagner V; Jenkin ME; Volkamer R; Bloss W; Lee JD; Heard DE; Wirtz K; Martin-Reviejo M; Rea G; Wenger JC; Pilling MJ Development of a detailed chemical mechanism (MCMv3.1) for the atmospheric oxidation of aromatic hydrocarbons Atmospheric Chemistry and Physics Discussions 4 5733-5788, 2004

Heard DE; Pilling MJ Measurement of OH and HO2 in the troposphere CHEM REV 103 5163-5198, 2003
DOI:10.1021/cr020522s

Creasey DJ; Evans GE; Heard DE; Lee JD Measurements of OH and HO2 concentrations in the Southern Ocean marine boundary layer Journal of Geophysical Research D: Atmospheres 108 -, 2003
View abstract

Creasey DJ; Evans GE; Heard DE; Lee JDL Measurements of OH and HO2concentrations in the Southern Ocean marine boundary layer Journal of Geophysical Research 108 pp.4475-, 2003
DOI:10.1029/2002JD003206

Dillon T; Heard DE A laser-induced fluorescence study of the O(3P) + CF3I and IO+NO reactions. Evidence for an association channel for O + CF3I at low temperatures Journal of Photochemistry and Photobiology, A: Chemistry 157 223-230, 2003
DOI:10.1016/S1010-6030(03)00056-X

Bell N; Heard DE; Pilling MJ; Tomlin AS Atmospheric lifetime as a probe of radical chemistry in the boundary layer ATMOS ENVIRON 37 2193-2205, 2003
DOI:10.1016/S1352-2310(03)00157-2

Bloss WJ; Gravestock TJ; Heard DE; Ingham T; Johnson GP; Lee JD Application of a compact all solid-state laser system to the in situ detection of atmospheric OH, HO2, NO and IO by laser-induced fluorescence. J Environ Monit 5 21-28, 2003
View abstract

Bloss W; Lee JDL; Bloss C; Wirtz K; Martin-Reviejo M; Siese M; Heard DE; Pilling MJ Validation of the Calibration of a laser-induced fluorescence instrument for the measurement of OH radicals in the atmosphere Atmospheric Chemistry and Physics Discussions 3 6029-6061, 2003

Blitz MA; Heard DE; Pilling MJ OH formation from CH3CO+O-2: a convenient experimental marker for the acetyl radical CHEM PHYS LETT 365 374-379, 2002

Marcy TP; Heard DE; Leone SR Product studies of inelastic and reactive collisions of NH2+NO: Effects of vibrationally and electronically excited NH2 Journal of Physical Chemistry B 106 8249-8255, 2002

Ravishankara AR; Dunlea EJ; Blitz MA; Dillon TJ; Heard DE; Pilling MJ; Strekowski RS; Nicovich JM; Wine PH Redetermination of the rate coefficient for the reaction of O(D-1) with N-2 GEOPHYS RES LETT 29 -, 2002
DOI:10.1029/2002GL014850

Carslaw N; Creasey DJ; Heard DE; Jacobs P; Lee JDL; Lewis AC; McQuaid JB; Pilling MJ; Bauguitte S; Penkett SA; Monks PS; Salisbury G Eastern Atlantic Spring Experiment 1997 (EASE97) - 2. Comparisons of model concentrations of OH, HO2, and RO2 with measurements Journal of Geophysical Research 107 pp.4190/ ACH5-, 2002
DOI:10.1029/2001JD001568

Creasey DJ; Heard DE; Lee JD Eastern Atlantic spring experiment 1997 (EASE97) 1. Measurements of OH and HO2 concentrations at Mace Head, Ireland Journal of Geophysical Research D: Atmospheres 107 3-1, 2002
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Creasey DJ; Heard DE; Lee JDL Eastern Atlantic Spring Experiment 1997 (EASE97) 1. Measurements of OH and HO2 concentrations at Mace Head, Ireland Journal of Geophysical Research 107 pp.4091/ ACH3-, 2002
DOI:10.1029/2001JD000892

Heard DE Stratospheric Chemistry and Composition: Hydroxyl Radical In Encyclopedia of Amospheric Sciences , 2002

Carslaw N; Creasey DJ; Heard DE; Jacobs PJ; Lee JD; Lewis AC; McQuaid JB; Pilling MJ; Bauguitte S; Penkett SA; Monks PS; Salisbury G Eastern Atlantic Spring Experiment 1997 (EASE97) 2. Comparisons of model concentrations of OH, HO2, and RO2 with measurements Journal of Geophysical Research: Atmospheres 107 -, 2002
DOI:10.1029/2001JD001568
View abstract

Carslaw N; Creasey DJ; Heard DE; Jacobs PJ; Lee JD; Lewis AC; McQuaid JB; Pilling MJ; Bauguitte S; Penkett SA; Monks PS; Salisbury G Eastern Atlantic Spring Experiment 1997 (EASE97) 2. Comparisons of model concentrations of OH, HO2, and RO2 with measurements Journal of Geophysical Research: Atmospheres 107 -, 2002
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Carslaw N; Heard DE; Lee JD; Lewis AC; Pilling MJ; Saunders SM Probing chemical mechanisms in clean and polluted environments through field measurement/model comparisons, 2002

Marcy TP; Diaz RR; Heard DE; Leone SR; Harding LB; Klippenstein SJ Theoretical and experimental investigation of the dynamics of the production of CO from the CH3+O and CD3+O reactions Journal of Physical Chemistry B 105 8361-8369, 2001

Creasey DJ; Heard DE; Lee JD OH and HO2 measurements in a forested region of north-western Greece ATMOS ENVIRON 35 4713-4724, 2001

Carslaw N; Creasey DJ; Harrison D; Heard DE; Hunter MC; Jacobs PJ; Jenkin ME; Lee JD; Lewis AC; Pilling MJ; Saunders SM; Seakins PW OH and HO2 radical chemistry in a forested region of north-western Greece ATMOS ENVIRON 35 4725-4737, 2001

Salisbury G; Rickard AR; Monks PS; Allan BJ; Bauguitte S; Penkett SA; Carslaw N; Lewis AC; Creasey DJ; Heard DE; Jacobs PJ; Lee JD Production of peroxy radicals at night via reactions of ozone and the nitrate radical in the marine boundary layer J GEOPHYS RES-ATMOS 106 12669-12687, 2001

Vakhtin AB; Heard DE; Smith IWM; Leone SR KInetics of C2H radical reactions with ethene, propene and 1-butene measured in a pulsed Laval nozzle apparatus at T= 103 K and 296K Chemical Physics Letters 348 21-26, 2001
DOI:10.1016/S0009-2614(01)00975-7

Vakhtin AB; Lee S; Heard DE; Smith IWM; Leone SR Low-temperature kinetics of reactions of OH radical with propene and 1-butene studied by a pulsed Lavel nozzle apparatus with laser-induced fluorescence Journal of Physical Chemistry B 105 7889-7895, 2001

Vakhtin AB; Heard DE; Smith IWM; Leone SR Kinetics of reactions of C2H radical with O2, acetylene, methlyacetylene and allene studied by a pulsed laval nozzle apparatus at T= 103 K Chemical Physics Letters 344 317-324, 2001
DOI:10.1016/S0009-2614(01)00681-9

Salisbury G; Rickard AR; Monks PS; Allan BJ; Bauguitte S; Penkett SA; Carslaw N; Lewis AC; Creasey DJ; Heard DE; Jacobs P; Lee J Production of peroxy radicals at night via reactions of ozone and the nitrate radical in the marine boundary layer Journal of Geophysical Research 106 12669-12688, 2001
DOI:10.1029/2000JD900754

Abram JP; Creasey DJ; Heard DE; Lee JDL; Pilling MJ Hydroxyl radical and ozone measurements in England during the solar eclipse of 11 August 1999 Geophysical Research Letters 27 3437-3440, 2000

Creasey DJ; Heard DE; Lee JDL Absorption cross-section measurements of water vapour and oxygen at 185nm. Implications for the calibration of field instruments to measure OH, HO2 and RO2 radicals Geophysical Research Letters 27 1651-1654, 2000

Heard DE; Henderson DA Quenching of OH (A (2)Sigma(+), upsilon '=0) by several collision partners between 200 and 344 K. Cross-section measurements and model comparisons PHYS CHEM CHEM PHYS 2 67-72, 2000

Carslaw N; Creasey DJ; Heard DE; Lewis AC; McQuaid JB; Pilling MJ; Monks PS; Bandy BJ; Penkett SA Modeling OH, HO2, and RO2 radicals in the marine boundary layer - 1. Model construction and comparison with field measurements J GEOPHYS RES-ATMOS 104 30241-30255, 1999

Grenfell JL; Harrison RM; Allen AG; Shi JP; Penkett SA; O'Dowd CD; Smith MH; Hill MK; Robertson L; Hewitt CN; Davison B; Lewis AC; Creasey DJ; Heard DE; Hebestreit K; Alicke B; James J An analysis of rapid increases in condensation nuclei concentrations at a remote coastal site in western Ireland J GEOPHYS RES-ATMOS 104 13771-13780, 1999

O'Dowd C; McFiggans G; Creasey DJ; Pirjola L; Hoell C; Smith MH; Allan BJ; Plane JMC; Heard DE; Lee JD; Pilling MJ; Kulmala M On the photochemical production of new particles in the coastal boundary layer GEOPHYS RES LETT 26 1707-1710, 1999

Carslaw N; Creasey DJ; Heard DE; Lewis AC; McQuaid JB; Pilling MJ; Monks PS; Bandy BJ; Penkett SA Modelling OH, HO2and RO2radicals in the marine boundary layer: 1. Model construction and comparison with field measurements Journal of Geophysical Research 104 30241-30255, 1999

Bailey AE; Heard DE; Henderson D; Paul PH Collisional quenching of OH(A2Σ+,v'=0) by H2O between 211 and 294 K and the development of a unified model for quenching Chemical Physics Letters 302 132-138, 1999

Creasey DJ; Halford-Maw PA; Heard DE; Spence JE; Whitaker BJ Fast photomultiplier tube gating system for photon counting applications REV SCI INSTRUM 69 4068-4073, 1998

Heard DE New directions - Measuring the elusive tropospheric hydroxyl radical ATMOS ENVIRON 32 801-802, 1998

Zeng G; Heard DE; Pilling MJ; Robertson SH A master equation study of laser-generated interference in the detection of hydroxyl radicals using laser-induced fluorescence Geophysical Research Letters 25 4497-4500, 1998

Creasey DJ; Heard DE; Pilling MJ; Whitaker BJ; Berzins M; Fairlie R Visualisation of a supersonic free-jet expansion using laser-induced fluorescence spectroscopy: Application to the measurement of rate constants at ultralow temperatures APPL PHYS B-LASERS O 65 375-391, 1997

Bailey AE; Heard DE; Paul PH; Pilling MJ Collisional quenching of OH (A(2)Sigma(+), upsilon'=0) by N-2, O-2 and CO2 between 204 and 294 K. Implications for atmospheric measurements of OH by laser-induced fluorescence J CHEM SOC FARADAY T 93 2915-2920, 1997

Brownsword RA; Hancock G; Heard DE Kinetics of the N + NCO reaction at 298 K Journal of the Chemical Society - Faraday Transactions 93 2473-2475, 1997
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Creasey DJ; Halford-Maw PA; Heard DE; Pilling MJ; Whitaker JBC Implementation and initial deployment of a field instrument for measurement of OH and HO2in the troposphere by laser-induced fluorescence Faraday Transactions 93 2907-2913, 1997

Lewis AC; Bartle KD; Heard DE; McQuaid JB; Pilling MJ; Seakins PW In situ,gas chromatographic measurements of non-methane hydrocarbons and dimethyl sulfide at a remote coastal location (Mace Head, Eire) July-August 1996 Faraday Transactions 93 2921-2927, 1997

Mehlmann C; Frost MJ; Heard DE; Orr BJ; Nelson PF Rate constants for removal of CH(D) (v = 0 and 1) by collisions with N2, CO, O2, NO and NO2 at 298 K and with CO2 at 296≤ T/K ≤ 873 Journal of the Chemical Society - Faraday Transactions 92 2335-2341, 1996
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Milce AP; Heard DE; Miller RE; Orr BJ Rovibrational spectroscopy of the C2H2-Ar-van der Waals complex, using a fluorescence depletion infrared-ultraviolet double resonance technique CHEM PHYS LETT 250 95-103, 1996

HEAL MR; HEARD DE; PILLING MJ; WHITAKER BJ ON THE DEVELOPMENT AND VALIDATION OF FAGE FOR LOCAL MEASUREMENT OF TROPOSPHERIC OH AND HO2 J ATMOS SCI 52 3428-3441, 1995