Daniel Stone
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View article: Development of a novel instrument for long-term measurements of OH reactivity 
Development of a novel instrument for long-term measurements of OH reactivity  Open
Improving air quality is one of the main challenges in achieving a sustainable future. The mitigation strategies for air quality and climate change require accurate knowledge of both the amount of trace gases present in the atmosphere and …
View article: Investigating HO2 uptake onto the surface of secondary organic 
Investigating HO2 uptake onto the surface of secondary organic  Open
The concentrations of HO2, a critical radical in the atmosphere, are often overestimated in atmospheric models (1). These discrepancies have sometimes been attributed to the heterogeneous uptake to atmospheric aerosols.However, the correct…
View article: Long-term field measurements of OH reactivity using laser flash photolysis coupled with time-resolved broadband UV absorption spectroscopy
Long-term field measurements of OH reactivity using laser flash photolysis coupled with time-resolved broadband UV absorption spectroscopy Open
Air quality is an important issue to human health and the climate. Poor air quality has been proven to be a risk factor in a wide range of cardiovascular and respiratory diseases, and it contributes to 6.9 million premature deaths worldwid…
View article: Kinetics of the Reaction Between the Criegee Intermediate CH<sub>2</sub>OO and NO<sub>2</sub>: Experimental Measurements and Comparison with Theory
Kinetics of the Reaction Between the Criegee Intermediate CH<sub>2</sub>OO and NO<sub>2</sub>: Experimental Measurements and Comparison with Theory Open
Kinetics of the gas phase reaction between the stabilized Criegee intermediate formaldehyde oxide (CH2OO) and nitrogen dioxide (NO2) have been measured using laser flash photolysis of CH2I2/O2/N2/NO2 mixtures coupled with time-resolved bro…
View article: Temperature-Dependent, Site-Specific Rate Coefficients for the Reaction of OH (OD) with Methyl Formate Isotopologues via Experimental and Theoretical Studies
Temperature-Dependent, Site-Specific Rate Coefficients for the Reaction of OH (OD) with Methyl Formate Isotopologues via Experimental and Theoretical Studies Open
Methyl esters are an important component of combustion and atmospheric systems. Reaction with the OH radical plays an important role in the removal of the simplest methyl ester, methyl formate (MF, CH3OCHO). In this paper, the overall rate…
View article: Kinetics of the Gas-Phase Reactions of <i>syn</i>- and <i>anti</i>-CH<sub>3</sub>CHOO Criegee Intermediate Conformers with SO<sub>2</sub> as a Function of Temperature and Pressure
Kinetics of the Gas-Phase Reactions of <i>syn</i>- and <i>anti</i>-CH<sub>3</sub>CHOO Criegee Intermediate Conformers with SO<sub>2</sub> as a Function of Temperature and Pressure Open
Kinetics of reactions between SO2 and CH3CHOO Criegee intermediate conformers have been measured at temperatures between 242 and 353 K and pressures between 10 and 600 Torr using laser flash photolysis of CH3CHI2/O2/N2/SO2 gas mixtures cou…
View article: A laboratory and 0D box modelling study of the wintertime formation of HONO from aerosol surfaces in Fairbanks, Alaska
A laboratory and 0D box modelling study of the wintertime formation of HONO from aerosol surfaces in Fairbanks, Alaska Open
As a high-latitude city, Fairbanks, Alaska, undergoes prolonged, cold winters with limited sunlight, and strong surface temperature inversions. These conditions coupled with its position at the bottom of the Tanana Valley lead to cold, dar…
View article: Glyoxal Yields from Selected Hydrocarbon Oxidations
Glyoxal Yields from Selected Hydrocarbon Oxidations Open
Glyoxal is a second generation product of atmospheric volatile organic compound (VOC) oxidation with both biogenic and anthropogenic compounds being major sources. Measurements of glyoxal provide information on the mechanism of precursor o…
View article: Comparison of temperature-dependent calibration methods of an instrument to measure OH and HO <sub>2</sub> radicals using laser-induced fluorescence spectroscopy
Comparison of temperature-dependent calibration methods of an instrument to measure OH and HO <sub>2</sub> radicals using laser-induced fluorescence spectroscopy Open
Laser-induced fluorescence (LIF) spectroscopy has been widely applied to fieldwork measurements of OH radicals and HO2, following conversion to OH, over a wide variety of conditions, on different platforms and in simulation chambers. Conve…
View article: Comparison of temperature dependent calibration methods of an instrument to measure OH and HO <sub>2</sub> radicals using laser-induced fluorescence spectroscopy
Comparison of temperature dependent calibration methods of an instrument to measure OH and HO <sub>2</sub> radicals using laser-induced fluorescence spectroscopy Open
Laser Induced Fluorescence (LIF) spectroscopy has been widely applied to fieldwork measurements of OH radicals, and of HO2, following conversion to OH, over a wide variety of conditions, on different platforms, and in simulation chambers. …
View article: Evaluation of model-simulated glyoxal in the remote marine atmosphere and dependencies sea-air exchange processes
Evaluation of model-simulated glyoxal in the remote marine atmosphere and dependencies sea-air exchange processes Open
Reactive volatile organic compounds (VOCs) in the remote marine atmosphere have impacts on climate through affecting atmospheric oxidation capacity (with subsequent effects on methane lifetime), and through affecting remote aerosol abundan…
View article: Extensive field evidence for the release of HONO from the photolysis of nitrate aerosols
Extensive field evidence for the release of HONO from the photolysis of nitrate aerosols Open
Particulate nitrate ( ) has long been considered a permanent sink for NO x (NO and NO 2 ), removing a gaseous pollutant that is central to air quality and that influences the global self-cleansing capacity of the atmosphere. Evidenc…
View article: Unimolecular Kinetics of Stabilized CH<sub>3</sub>CHOO Criegee Intermediates: <i>syn</i>-CH<sub>3</sub>CHOO Decomposition and <i>anti</i>-CH<sub>3</sub>CHOO Isomerization
Unimolecular Kinetics of Stabilized CH<sub>3</sub>CHOO Criegee Intermediates: <i>syn</i>-CH<sub>3</sub>CHOO Decomposition and <i>anti</i>-CH<sub>3</sub>CHOO Isomerization Open
The kinetics of the unimolecular decomposition of the stabilized Criegee intermediate syn-CH3CHOO has been investigated at temperatures between 297 and 331 K and pressures between 12 and 300 Torr using laser flash photolysis of CH3CHI2/O2/…
View article: Identification, monitoring, and reaction kinetics of reactive trace species using time-resolved mid-infrared quantum cascade laser absorption spectroscopy: development, characterisation, and initial results for the CH <sub>2</sub> OO Criegee intermediate
Identification, monitoring, and reaction kinetics of reactive trace species using time-resolved mid-infrared quantum cascade laser absorption spectroscopy: development, characterisation, and initial results for the CH <sub>2</sub> OO Criegee intermediate Open
The chemistry and reaction kinetics of reactive species dominate changes to the composition of complex chemical systems, including Earth's atmosphere. Laboratory experiments to identify reactive species and their reaction products, and to …
View article: Observations and modelling of glyoxal in the tropical Atlantic marine boundary layer
Observations and modelling of glyoxal in the tropical Atlantic marine boundary layer Open
In situ field measurements of glyoxal at the surface in the tropical marine boundary layer have been made with a temporal resolution of a few minutes during two 4-week campaigns in June–July and August–September 2014 at the Cape Verde Atmo…
View article: Reply on RC2
Reply on RC2 Open
Abstract. The chemistry and reaction kinetics of reactive species dominate changes to the composition of complex chemical systems, including Earth's atmosphere. Laboratory experiments to identify reactive species and their reaction product…
View article: Reply on RC2
Reply on RC2 Open
Abstract. The chemistry and reaction kinetics of reactive species dominate changes to the composition of complex chemical systems, including Earth's atmosphere. Laboratory experiments to identify reactive species and their reaction product…
View article: Reply on RC1
Reply on RC1 Open
Abstract. The chemistry and reaction kinetics of reactive species dominate changes to the composition of complex chemical systems, including Earth's atmosphere. Laboratory experiments to identify reactive species and their reaction product…
View article: Identification, monitoring, and reaction kinetics of reactive trace species using time-resolved mid-infrared quantum cascade laser absorption spectroscopy: Development, characterisation, and initial results for the Criegee intermediate CH <sub>2</sub> OO
Identification, monitoring, and reaction kinetics of reactive trace species using time-resolved mid-infrared quantum cascade laser absorption spectroscopy: Development, characterisation, and initial results for the Criegee intermediate CH <sub>2</sub> OO Open
The chemistry and reaction kinetics of reactive species dominate changes to the composition of complex chemical systems, including Earth’s atmosphere. Laboratory experiments to identify reactive species and their reaction products, and to …
View article: Observations and modelling of glyoxal in the tropical Atlantic marine boundary layer
Observations and modelling of glyoxal in the tropical Atlantic marine boundary layer Open
In situ field measurements of glyoxal at the surface in the tropical marine boundary layer have been made with a temporal resolution of a few minutes during two 4-week campaigns in June–July and August–September 2014 at the Cape Verde Atmo…
View article: Production of HONO from NO <sub>2</sub> uptake on illuminated TiO <sub>2</sub> aerosol particles and following the illumination of mixed TiO <sub>2</sub> ∕ammonium nitrate particles
Production of HONO from NO <sub>2</sub> uptake on illuminated TiO <sub>2</sub> aerosol particles and following the illumination of mixed TiO <sub>2</sub> ∕ammonium nitrate particles Open
The rate of production of HONO from illuminated TiO2 aerosols in the presence of NO2 was measured using an aerosol flow tube system coupled to a photo-fragmentation laser-induced fluorescence detection apparatus. The reactive uptake coeffi…
View article: Kinetics of the gas phase reaction of the Criegee intermediate CH<sub>2</sub>OO with SO<sub>2</sub>as a function of temperature
Kinetics of the gas phase reaction of the Criegee intermediate CH<sub>2</sub>OO with SO<sub>2</sub>as a function of temperature Open
The kinetics of the gas phase reaction of the Criegee intermediate CH 2 OO with SO 2 have been studied as a function of temperature in the range 223–344 K at 85 Torr using flash photolysis of CH 2 I 2 /O 2 /SO 2 /N 2 mixtures at 248 nm cou…
View article: Kinetics of the Gas Phase Reactions of the Criegee Intermediate CH<sub>2</sub>OO with O<sub>3</sub> and IO
Kinetics of the Gas Phase Reactions of the Criegee Intermediate CH<sub>2</sub>OO with O<sub>3</sub> and IO Open
The kinetics of the gas phase reactions of the Criegee intermediate CH2OO with O3 and IO have been studied at 296 K and 300 Torr through simultaneous measurements of CH2OO, the CH2OO precursor (CH2I2), O3, and IO using flash photolysis of …
View article: Photo-Induced Heterogeneous Chemistry of Reactive Species on Aerosol Surfaces: Using Photo-Fragmentation Laser Induced Fluorescence for the Measurement of Nitrous Acid Production from Titanium Dioxide Aerosols
Photo-Induced Heterogeneous Chemistry of Reactive Species on Aerosol Surfaces: Using Photo-Fragmentation Laser Induced Fluorescence for the Measurement of Nitrous Acid Production from Titanium Dioxide Aerosols Open
<p>The hydroxyl radical (OH) is the main oxidant in the troposphere and is vitally important for its role in the removal of greenhouse gases such as methane from the atmosphere. Moreover, the OH radical also has a role in the formati…
View article: A new instrument for time-resolved measurement of HO <sub>2</sub> radicals
A new instrument for time-resolved measurement of HO <sub>2</sub> radicals Open
OH and HO2 radicals are closely coupled in the atmospheric oxidation and combustion of volatile organic compounds (VOCs). Simultaneous measurement of HO2 yields and OH kinetics can provide the ability to assign site-specific rate coefficie…
View article: Data for the publication ‘A new instrument for time-resolved measurement of HO2 radicals’
Data for the publication ‘A new instrument for time-resolved measurement of HO2 radicals’ Open
Time resolved OH and HO2 traces for the reactions of the hydroxyl radical with hydrogen peroxide (H2O2), methanol (CH3OH) and n-butanol (nC4H9OH)
View article: A New Instrument for Time Resolved Measurement of HO <sub>2</sub> Radicals
A New Instrument for Time Resolved Measurement of HO <sub>2</sub> Radicals Open
OH and HO2 radicals are closely coupled in the atmospheric oxidation and combustion of volatile organic compounds (VOCs). Simultaneous measurement of HO2 yields and OH kinetics can provide the ability to assign site specific rate coefficie…
View article: Impacts of bromine and iodine chemistry on tropospheric OH and HO <sub>2</sub> : comparing observations with box and global model perspectives
Impacts of bromine and iodine chemistry on tropospheric OH and HO <sub>2</sub> : comparing observations with box and global model perspectives Open
The chemistry of the halogen species bromine and iodine has a range of impacts on tropospheric composition, and can affect oxidising capacity in a number of ways. However, recent studies disagree on the overall sign of the impacts of halog…