West Europe from space stock photo

Our People

Martyn Chipperfield

Professor of Atmospheric Chemistry
EO Data-Model Evaluation

Research interests

I am interested in air pollution, chemistry-climate interactions and Earth-system modelling. I work on global and regional models of atmospheric composition including UKCA, the chemistry and aerosol component of the new UK joint NERC-Met Office Earth-system model.

Recent publications

Investigation of the impact of satellite vertical sensitivity on long-term retrieved lower-tropospheric ozone trends. 2024-08-22

The impact of El Niño–Southern Oscillation on the total column ozone over the Tibetan Plateau. 2024-07-23

Antarctic Vortex Dehydration in 2023 as a Substantial Removal Pathway for Hunga Tonga-Hunga Ha’apai Water Vapor. 2024

First HFC-134a retrievals from ground-based FTIR solar absorption spectra, comparison with TOMCAT model simulations, in-situ AGAGE observations, and ACE-FTS satellite data for the Jungfraujoch station. 2024

First validation of high-resolution satellite-derived methane emissions from an active gas leak in the UK. 2024

Investigating Zonal Asymmetries in Stratospheric Ozone Trends From Satellite Limb Observations and a Chemical Transport Model. 2024

Opinion: Stratospheric ozone – depletion, recovery and new challenges. 2024

Quantifying effects of long-range transport of NO2 over Delhi using back trajectories and satellite data. 2024

Quantifying the tropospheric ozone radiative effect and its temporal evolution in the satellite era. 2024

Potential Stratospheric Ozone Depletion Due To Iodine Injection From Small Satellites. 2023-04-16

Atmospheric CO 2 inversion reveals the Amazon as a minor carbon source caused by fire emissions, with forest uptake offsetting about half of these emissions. 2023

Atmospheric distribution of HCN from satellite observations and 3-D model simulations. 2023

Atmospheric impacts of chlorinated very short-lived substances over the recent past – Part 2: Impacts on ozone. 2023

Constraining the budget of atmospheric carbonyl sulfide using a 3-D chemical transport model. 2023

Decreasing seasonal cycle amplitude of methane in the northern high latitudes being driven by lower-latitude changes in emissions and transport. 2023

Description and evaluation of the new UM-UKCA (vn11.0) Double Extended Stratospheric-Tropospheric (DEST vn1.0) scheme for comprehensive modelling of halogen chemistry in the stratosphere. 2023

Intercomparison of Atmospheric Carbonyl Sulfide (TransCom-COS): 2. Evaluation of Optimized Fluxes Using Ground-Based and Aircraft Observations. 2023

Investigation of spatial and temporal variability in lower tropospheric ozone from RAL Space UV-Vis satellite products. 2023

Investigation of the summer 2018 European ozone air pollution episodes using novel satellite data and modelling. 2023

Quantifying stratospheric ozone trends over 1984-2020: a comparison of ordinary and regularized multivariate regression models. 2023

The Influence of Internal Climate Variability on Stratospheric Water Vapor Increases After Large-Magnitude Explosive Tropical Volcanic Eruptions. 2023

Trends in polar ozone loss since 1989: potential sign of recovery in the Arctic ozone column. 2023

Using a deep neural network to detect methane point sources and quantify emissions from PRISMA hyperspectral satellite images. 2023

Using machine learning to construct TOMCAT model and occultation measurement-based stratospheric methane (TCOM-CH4) and nitrous oxide (TCOM-N2O) profile data sets. 2023

Very short-lived halogens amplify ozone depletion trends in the tropical lower stratosphere. 2023

Comment on “Observation of large and all-season ozone losses over the tropics” [AIP Adv. 12, 075006 (2022)]. 2022-12-01

Integrated ozone depletion as a metric for ozone recovery. 2022-08-25

Atmospheric impacts of chlorinated very short-lived substances over the recent past – Part 1: Stratospheric chlorine budget and the role of transport. 2022-08-23

Effects of reanalysis forcing fields on ozone trends and age of air from a chemical transport model. 2022-08-23

Investigating the global OH radical distribution using steady-state approximations and satellite data. 2022-08-17

A stratospheric prognostic ozone for seamless Earth system models: performance, impacts and future. 2022-04-04

Exploiting satellite measurements to explore uncertainties in UK bottom-up NO<sub><i>x</i></sub> emission estimates. 2022-04-04

Level 2 processor and auxiliary data for ESA Version 8 final full mission analysis of MIPAS measurements on ENVISAT. 2022-03-28

A single-peak-structured solar cycle signal in stratospheric ozone based on Microwave Limb Sounder observations and model simulations. 2022-01-19

Responses of Arctic sea ice to stratospheric ozone depletion. 2022

Satellite observations and modelling of hydrogen cyanide in the Earth’s atmosphere. 2022

ML-TOMCAT: machine-learning-based satellite-corrected global stratospheric ozone profile data set from a chemical transport model. 2021-12-10

Stratospheric Fluorine as a Tracer of Circulation Changes: Comparison Between Infrared Remote‐Sensing Observations and Simulations With Five Modern Reanalyses. 2021-10-16

Organic and inorganic bromine measurements around the extratropical tropopause and lowermost stratosphere: insights into the transport pathways and total bromine. 2021-10-15

Large Methane Emissions From the Pantanal During Rising Water‐Levels Revealed by Regularly Measured Lower Troposphere CH4 Profiles. 2021-10

Large Enhancements in Southern Hemisphere Satellite‐Observed Trace Gases Due to the 2019/2020 Australian Wildfires. 2021-09-27

Large and increasing methane emissions from eastern Amazonia derived from satellite data, 2010–2018. 2021-07-14

Polar Stratospheric Clouds: Satellite Observations, Processes, and Role in Ozone Depletion. 2021-06

Diagnosing air quality changes in the UK during the COVID-19 lockdown using TROPOMI and GEOS-Chem. 2021-05-01

Fifteen Years of HFC‐134a Satellite Observations: Comparisons With SLIMCAT Calculations. 2021-04-27

Unprecedented Spring 2020 Ozone Depletion in the Context of 20 Years of Measurements at Eureka, Canada. 2021-04-27

How Robust Is the Apparent Break‐Down of Northern High‐Latitude Temperature Control on Spring Carbon Uptake?. 2021-04-16

COVID-19 lockdown-induced changes in NO<sub>2</sub> levels across India observed by multi-satellite and surface observations. 2021-04-01

The Unusual Stratospheric Arctic Winter 2019/20: Chemical Ozone Loss From Satellite Observations and TOMCAT Chemical Transport Model. 2021-03-27

Arctic Ozone Depletion in 2019/20: Roles of Chemistry, Dynamics and the Montreal Protocol. 2021-02-28

A decline in global CFC-11 emissions during 2018−2019. 2021-02-18

Cloud-scale modelling of the impact of deep convection on the fate of oceanic bromoform in the troposphere: A case study over the west coast of Borneo. 2021

The role of chemical processes in the quasi-biennial oscillation (QBO) signal in stratospheric ozone. 2021

Exploring constraints on a wetland methane emission ensemble (WetCHARTs) using GOSAT observations. 2020-11-23

Evaluating the simulated radiative forcings, aerosol properties, and stratospheric warmings from the 1963 Mt Agung, 1982 El Chichón, and 1991 Mt Pinatubo volcanic aerosol clouds. 2020-11-13

Gravitational separation of Ar∕N<sub>2</sub> and age of air in the lowermost stratosphere in airborne observations and a chemical transport model. 2020-10-30

Tropospheric ozone radiative forcing uncertainty due to pre-industrial fire and biogenic emissions. 2020-09-22

Analysis and attribution of total column ozone changes over the Tibetan Plateau during 1979–2017. 2020-07-22

A Synthesis Inversion to Constrain Global Emissions of Two Very Short Lived Chlorocarbons: Dichloromethane, and Perchloroethylene. 2020-06-27

Modelling the potential impacts of the recent, unexpected increase in CFC-11 emissions on total column ozone recovery. 2020-06-19

Renewed and emerging concerns over the production and emission of ozone-depleting substances. 2020-04-30

Decomposing the response of the stratospheric Brewer–Dobson circulation to an abrupt quadrupling in CO<sub>2</sub>. 2020-04-15

Description and evaluation of the UKCA stratosphere–troposphere chemistry scheme (StratTrop vn 1.0) implemented in UKESM1. 2020-03-17

Substantial Increases in Eastern Amazon and Cerrado Biomass Burning‐Sourced Tropospheric Ozone. 2020-02-16

A comprehensive quantification of global nitrous oxide sources and sinks. 2020

Description and Evaluation of the specified-dynamics experiment in the Chemistry-Climate Model Initiative. 2020

Impact of the june 2018 saddleworth moor wildfires on air quality in Northern England. 2020

Impact on air quality and health due to the Saddleworth Moor fire in northern England. 2020

Quantifying the transboundary contribution of nitrogen oxides to UK air quality. 2020

Delay in recovery of the Antarctic ozone hole from unexpected CFC-11 emissions. 2019-12-19

Acceleration of global N2O emissions seen from two decades of atmospheric inversion. 2019-12-18

The effect of atmospheric nudging on the stratospheric residual circulation in chemistry–climate models. 2019-09-13

Challenges for the recovery of the ozone layer. 2019-08

Interannual Variations in Lower Stratospheric Ozone During the Period 1984–2016. 2019-07-27

Large Impacts, Past and Future, of Ozone‐Depleting Substances on Brewer‐Dobson Circulation Trends: A Multimodel Assessment. 2019-07-16

Impact of El Niño–Southern Oscillation on the interannual variability of methane and tropospheric ozone. 2019-07-09

Attribution of the Hemispheric Asymmetries in Trends of Stratospheric Trace Gases Inferred From Microwave Limb Sounder (MLS) Measurements. 2019-06-27

On the Regional and Seasonal Ozone Depletion Potential of Chlorinated Very Short‐Lived Substances. 2019-05-28

Recent Trends in Stratospheric Chlorine From Very Short‐Lived Substances. 2019-02-27

Phosgene in the Upper Troposphere and Lower Stratosphere: A Marker for Product Gas Injection Due to Chlorine‐Containing Very Short Lived Substances. 2019-01-28

Dynamically controlled ozone decline in the tropical mid-stratosphere observed by SCIAMACHY. 2019-01-22

Stratospheric ozone loss in the Arctic winters between 2005 and 2013 derived with ACE-FTS measurements. 2019-01-16

Attribution of recent increases in atmospheric methane through 3-D inverse modelling. 2018-12-21

A measurement-based verification framework for UK greenhouse gas emissions: an overview of the Greenhouse gAs Uk and Global Emissions (GAUGE) project. 2018-08-17

An Explanation for the Nitrous Oxide Layer Observed in the Mesopause Region. 2018-08-16

An updated version of a gap-free monthly mean zonal mean ozone database. 2018-08-16

On the discrepancy of HCl processing in the core of the wintertime polar vortices. 2018-06-20

On the Cause of Recent Variations in Lower Stratospheric Ozone. 2018-06-16

Estimates of ozone return dates from Chemistry-Climate Model Initiative simulations. 2018-06-15

Influence of the wintertime North Atlantic Oscillation on European tropospheric composition: an observational and modelling study. 2018-06-15

A refined method for calculating equivalent effective stratospheric chlorine. 2018-01-19

Stratospheric ozone loss over the Eurasian continent induced by the polar vortex shift. 2018-01-15

Heterogeneous reaction of HO<sub>2</sub> with airborne TiO<sub>2</sub> particles and its implication for climate change mitigation strategies. 2018-01-11

Impact on short-lived climate forcers increases projected warming due to deforestation. 2018-01-11

Ozone sensitivity to varying greenhouse gases and ozone-depleting substances in CCMI-1 simulations. 2018

Deriving Global OH Abundance and Atmospheric Lifetimes for Long‐Lived Gases: A Search for CH3CCl3 Alternatives. 2017-11-16

The relationship between lower-stratospheric ozone at southern high latitudes and sea surface temperature in the East Asian marginal seas in austral spring. 2017-06-08

Extending methane profiles from aircraft into the stratosphere for satellite total column validation using the ECMWF C-IFS and TOMCAT/SLIMCAT 3-D model. 2017-06-07

Quantifying the causes of differences in tropospheric OH within global models. 2017-02-16

Review of the global models used within phase 1 of the Chemistry–Climate Model Initiative (CCMI). 2017-02-13

A new Differential Optical Absorption Spectroscopy instrument to study atmospheric chemistry from a high- altitude unmanned aircraft. 2017

Detecting recovery of the stratospheric ozone layer. 2017

Determination of the atmospheric lifetime and global warming potential of sulfur hexafluoride using a three-dimensional model. 2017

Impact on short-lived climate forcers (SLCFs) from a realistic land-use change scenario via changes in biogenic emissions. 2017

Influence of the Arctic Oscillation on the Vertical Distribution of Wintertime Ozone in the Stratosphere and Upper Troposphere over the Northern Hemisphere. 2017

Probing the subtropical lowermost stratosphere and the tropical upper troposphere and tropopause layer for inorganic bromine. 2017

The increasing threat to stratospheric ozone from dichloromethane. 2017

Persistent shift of the Arctic polar vortex towards the Eurasian continent in recent decades. 2016-12-24

Model sensitivity studies of the decrease in atmospheric carbon tetrachloride. 2016-12-20

A global model of tropospheric chlorine chemistry: Organic versus inorganic sources and impact on methane oxidation. 2016-12-16

Intercomparison and evaluation of satellite peroxyacetyl nitrate observations in the upper troposphere–lower stratosphere. 2016-11-01

CH4 concentrations over the Amazon from GOSAT consistent with in situ vertical profile data. 2016

Contribution of regional sources to atmospheric methane over the Amazon Basin in 2010 and 2011. 2016

D-region ion-neutral coupled chemistry (Sodankyla Ion Chemistry, SIC) within the Whole Atmosphere Community Climate Model (WACCM4) – WACCM-SIC and WACCM-rSIC. 2016

Evaluation of simulated photolysis rates and their response to solar irradiance variability. 2016

Evaluation of the inter-annual variability of stratospheric chemical composition in chemistry-climate models using ground-based multi species time series. 2016

On the ambiguous nature of the 11year solar cycle signal in upper stratospheric ozone. 2016

Role of OH variability in the stalling of the global atmospheric CH4 growth rate from 1999 to 2006. 2016

Role of regional wetland emissions in atmospheric methane variability. 2016

Satellite observations of stratospheric hydrogen fluoride and comparisons with SLIMCAT calculations. 2016

Solar cycle response and long-term trends in the mesospheric metal layers. 2016

The impact of synoptic weather on UK surface ozone and implications for premature mortality. 2016

Diurnal variation of the potassium layer in the upper atmosphere. 2015

Efficiency of short-lived halogens at influencing climate through depletion of stratospheric ozone. 2015

Evaluation of a regional air quality model using satellite column NO2: treatment of observation errors and model boundary conditions and emissions. 2015

Global Atmosphere – The Antarctic Ozone Hole. 2015

Growth in stratospheric chlorine from short-lived chemicals not controlled by the Montreal Protocol. 2015

Multi-model study of chemical and physical controls on transport of anthropogenic and biomass burning pollution to the Arctic. 2015

Quantifying the ozone and ultraviolet benefits already achieved by the Montreal Protocol. 2015

Reaction between CH3O2 and BrO Radicals: A New Source of Upper Troposphere Lower Stratosphere Hydroxyl Radicals. 2015

Revisiting the hemispheric asymmetry in midlatitude ozone changes following the Mount Pinatubo eruption: A 3-D model study. 2015

Satellite constraint on the tropospheric ozone radiative effect. 2015

Suppression of CCN formation by bromine chemistry in the remote marine atmosphere. 2015

The influence of synoptic weather regimes on UK air quality: regional model studies of tropospheric column NO2. 2015

The near-global mesospheric potassium layer: Observations and modeling. 2015

Aerosol microphysics simulations of the Mt. Pinatubo eruption with the UM-UKCA composition-climate model. 2014

Comparison of the HadGEM2 climate-chemistry model against in situ and SCIAMACHY atmospheric methane data. 2014

Constraining the N2O5 UV absorption cross section from spectroscopic trace gas measurements in the tropical mid-stratosphere. 2014

Development of a variational flux inversion system (INVICAT v1.0) using the TOMCAT chemical transport model. 2014

First global observations of the mesospheric potassium layer. 2014

Global stratospheric fluorine inventory for 2004-2009 from Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) measurements and SLIMCAT model simulations. 2014

Multimodel estimates of atmospheric lifetimes of long-lived ozone-depleting substances: Present and future. 2014

Recent Northern Hemisphere stratospheric HCl increase due to atmospheric circulation changes. 2014

Resolving the strange behavior of extraterrestrial potassium in the upper atmosphere. 2014

Satellite observations of stratospheric carbonyl fluoride. 2014

The influence of synoptic weather regimes on UK air quality: analysis of satellite column NO2. 2014

TransCom N2O model inter-comparison – Part 1: Assessing the influence of transport and surface fluxes on tropospheric N2O variability. 2014

A global atmospheric model of meteoric iron. 2013

Atmospheric test of the J(BrONO2)/k(BrO+NO2) ratio: implications for total stratospheric Br-y and bromine-mediated ozone loss. 2013

Climate impact of stratospheric ozone recovery. 2013

Direct and indirect effects of solar variations on stratospheric ozone and temperature. 2013

Evaluating global emission inventories of biogenic bromocarbons. 2013

Impact of transport model errors on the global and regional methane emissions estimated by inverse modelling. 2013

Improvements in the stratospheric transport achieved by a chemistry transport model with ECMWF (re)analyses: identifying effects and remaining challenges. 2013

Off-line algorithm for calculation of vertical tracer transport in the troposphere due to deep convection. 2013

On the uses of a new linear scheme for stratospheric methane in global models: water source, transport tracer and radiative forcing. 2013

Plutonium-238 observations as a test of modeled transport and surface deposition of meteoric smoke particles. 2013

Stratospheric O-3 changes during 2001-2010: the small role of solar flux variations in a chemical transport model. 2013

The Mediterranean summertime ozone maximum: global emission sensitivities and radiative impacts. 2013

TransCom model simulations of methane: Comparison of vertical profiles with aircraft measurements. 2013

Analysis of stratospheric NO2 trends above Jungfraujoch using ground-based UV-visible, FTIR, and satellite nadir observations. 2012

Climate change projections and stratosphere-troposphere interaction. 2012

Evidence for El Nino-Southern Oscillation (ENSO) influence on Arctic CO interannual variability through biomass burning emissions. 2012

Interactions of meteoric smoke particles with sulphuric acid in the Earth’s stratosphere. 2012

Intercomparison of modal and sectional aerosol microphysics representations within the same 3-D global chemical transport model. 2012

Modelling future changes to the stratospheric source gas injection of biogenic bromocarbons. 2012

New Aura Microwave Limb Sounder observations of BrO and implications for Br-y. 2012

Observed and simulated time evolution of HCl, ClONO2, and HF total column abundances. 2012

Severe 2011 ozone depletion assessed with 11 years of ozone, NO2, and OClO measurements at 80 degrees N. 2012

The contribution of natural and anthropogenic very short-lived species to stratospheric bromine. 2012

The existence of the edge region of the Antarctic stratospheric vortex. 2012

Unusually low ozone, HCl, and HNO3 column measurements at Eureka, Canada during winter/spring 2011. 2012

A study of the Arctic NOy budget above Eureka, Canada. 2011

Analysis of reactive bromine production and ozone depletion in the Arctic boundary layer using 3-D simulations with GEM-AQ: inference from synoptic-scale patterns. 2011

Effects of sea surface temperature and greenhouse gas changes on the transport between the stratosphere and troposphere. 2011

Evaluation of cloud convection and tracer transport in a three-dimensional chemical transport model. 2011

Evaluation of stratospheric chlorine chemistry for the Arctic spring 2005 using modelled and measured OClO column densities. 2011

Impact of deep convection and dehydration on bromine loading in the upper troposphere and lower stratosphere. 2011

Improved predictability of the troposphere using stratospheric final warmings. 2011

Modelling the effect of denitrification on polar ozone depletion for Arctic winter 2004/2005. 2011

Multimodel climate and variability of the stratosphere. 2011

Projections of UV radiation changes in the 21st century: impact of ozone recovery and cloud effects. 2011

Representation of tropical deep convection in atmospheric models – Part 1: Meteorology and comparison with satellite observations. 2011

Representation of tropical deep convection in atmospheric models – Part 2: Tracer transport. 2011

Results from a new linear O-3 scheme with embedded heterogeneous chemistry compared with the parent full-chemistry 3-D CTM. 2011

Retrievals of chlorine chemistry kinetic parameters from Antarctic ClO microwave radiometer measurements. 2011

Solar response in tropical stratospheric ozone: a 3-D chemical transport model study using ERA reanalyses. 2011

TransCom model simulations of CH4 and related species: linking transport, surface flux and chemical loss with CH4 variability in the troposphere and lower stratosphere. 2011

Trends in atmospheric halogen containing gases since 2004. 2011

Using transport diagnostics to understand chemistry climate model ozone simulations. 2011

Aircraft measurements and model simulations of stratospheric ozone and N2O: implications for chemistry and transport processes in the models. 2010

Anthropogenic forcing of the Northern Annular Mode in CCMVal-2 models. 2010

Bromoform and dibromomethane in the tropics: a 3-D model study of chemistry and transport. 2010

Chemistry-Climate Model Simulations of Twenty-First Century Stratospheric Climate and Circulation Changes. 2010

Chemistry-climate model simulations of spring Antarctic ozone. 2010

Decline and recovery of total column ozone using a multimodel time series analysis. 2010

Description and evaluation of GLOMAP-mode: a modal global aerosol microphysics model for the UKCA composition-climate model. 2010

Effects of stratosphere-troposphere chemistry coupling on tropospheric ozone. 2010

Estimation of Antarctic ozone loss from ground-based total column measurements. 2010

Hydrogen fluoride total and partial column time series above the Jungfraujoch from long-term FTIR measurements: Impact of the line-shape model, characterization of the error budget and seasonal cycle, and comparison with satellite and model data. 2010

Impact of BrO on dimethylsulfide in the remote marine boundary layer. 2010

Impact of stratospheric ozone on Southern Hemisphere circulation change: A multimodel assessment. 2010

Influences of the Indian Summer Monsoon on Water Vapor and Ozone Concentrations in the UTLS as Simulated by Chemistry-Climate Models. 2010

Multi-model assessment of stratospheric ozone return dates and ozone recovery in CCMVal-2 models. 2010

Multimodel assessment of the factors driving stratospheric ozone evolution over the 21st century. 2010

Multimodel assessment of the upper troposphere and lower stratosphere: Extratropics. 2010

Multimodel assessment of the upper troposphere and lower stratosphere: Tropics and global trends. 2010

Review of the formulation of present-generation stratospheric chemistry-climate models and associated external forcings. 2010

Stratosphere-troposphere coupling and annular mode variability in chemistry-climate models. 2010

The potential to narrow uncertainty in projections of stratospheric ozone over the 21st century. 2010

Tracers and traceability: implementing the cirrus parameterisation from LACM in the TOMCAT/SLIMCAT chemistry transport model as an example of the application of quality assurance to legacy models. 2010

ATMOSPHERIC SCIENCE Nitrous oxide delays ozone recovery. 2009

An approach to retrieve information on the carbonyl fluoride (COF2) vertical distributions above Jungfraujoch by FTIR multi-spectrum multi-window fitting. 2009

Clear sky UV simulations for the 21st century based on ozone and temperature projections from Chemistry-Climate Models. 2009

Constraints on inorganic gaseous iodine in the tropical upper troposphere and stratosphere inferred from balloon-borne solar occultation observations. 2009

ENVISAT/SCIAMACHY VALIDATION WITH THE LPMA/DOAS/MINI-DOAS BALLOON GONDOLA: COMPARISON OF O-3, NO2 AND BRO PROFILES. 2009

Equatorial transport as diagnosed from nitrous oxide variability. 2009

Global carbon tetrachloride distributions obtained from the Atmospheric Chemistry Experiment (ACE). 2009

Impact of increasing stratospheric water vapor on ozone depletion and temperature change. 2009

Northern winter stratospheric temperature and ozone responses to ENSO inferred from an ensemble of Chemistry Climate Models. 2009

The contribution of anthropogenic bromine emissions to past stratospheric ozone trends: a modelling study. 2009

The relationship between aerosol and cloud drop number concentrations in a global aerosol microphysics model. 2009

A study of stratospheric chlorine partitioning based on new satellite measurements and modeling. 2008

Bromine in the tropical troposphere and stratosphere as derived from balloon-borne BrO observations. 2008

Contribution of particle formation to global cloud condensation nuclei concentrations. 2008

Coupled chemistry climate model simulations of the solar cycle in ozone and temperature. 2008

Effects of the Tibetan Plateau on total column ozone distribution. 2008

Impact of the new HNO(3)-forming channel of the HO(2)+NO reaction on tropospheric HNO(3), NO(x), HO(x) and ozone. 2008

Model evaluation of CO2 and SF6 in the extratropical UT/LS region. 2008

NO2 climatology in the northern subtropical region: diurnal, seasonal and interannual variability. 2008

Radiative effect of ozone change on stratosphere-troposphere exchange. 2008

Comparison of measured and modeled ozone above McMurdo Station, Antarctica, 1989-2003, during austral winter/spring. 2007

Comparison of polar ozone loss rates simulated by one-dimensional and three-dimensional models with Match observations in recent Antarctic and Arctic winters. 2007

Large chemical ozone loss in 2004/2005 Arctic winter/spring. 2007

Mean age of air and transport in a CTM: Comparison of different ECMWF analyses. 2007

Mid-latitude ozone changes: studies with a 3-D CTM forced by ERA-40 analyses. 2007

Multimodel projections of stratospheric ozone in the 21st century. 2007

Nitric acid measurements at Eureka obtained in winter 2001-2002 using solar and lunar Fourier transform infrared absorption spectroscopy: Comparisons with observations at Thule and Kiruna and with results from three-dimensional models. 2007

Quantifying Arctic ozone loss during the 2004-2005 winter using satellite observations and a chemical transport model. 2007

Regional and global trends in sulfate aerosol since the 1980s. 2007

Retrieval of stratospheric and tropospheric BrO profiles and columns using ground-based zenith-sky DOAS observations at Harestua, 60 degrees N. 2007

Statistical inference of OH concentrations and air mass dilution rates from successive observations of nonmethane hydrocarbons in single air masses. 2007

Validation of Aura Microwave Limb Sounder BrO observations in the stratosphere. 2007

Arctic winter 2005: Implications for stratospheric ozone loss and climate change. 2006

Assessment of temperature, trace species, and ozone in chemistry-climate model simulations of the recent past. 2006

Balloon-borne stratospheric BrO measurements: comparison with Envisat/SCIAMACHY BrO limb profiles. 2006

Chemical ozone loss in the Arctic winter 2002/2003 determined with Match. 2006

EOS Microwave Limb Sounder observations of upper stratospheric BrO: Implications for total bromine. 2006

Inter-comparison of stratospheric O-3 and NO2 abundances retrieved from balloon borne direct sun observations and Envisat/SCIAMACHY limb measurements. 2006

Long-term observations of stratospheric bromine reveal slow down in growth. 2006

New version of the TOMCAT/SLIMCAT off-line chemical transport model: Intercomparison of stratospheric tracer experiments. 2006

Quasi-biennial oscillation and tracer distributions in a coupled chemistry-climate model. 2006

Stratospheric water vapor trends in a coupled chemistry-climate model. 2006

Stratospheric water vapor trends in a coupled chemistry-climate model (vol 33, art no L06819, 2006). 2006

Testing our understanding of Arctic denitrification using MIPAS-E satellite measurements in winter 2002/2003. 2006

Tropospheric and stratospheric BrO columns over Arrival Heights, Antarctica, 2002. 2006

2002-2003 Arctic ozone loss deduced from POAM III satellite observations and the SLIMCAT chemical transport model. 2005

3-D microphysical model studies of Arctic denitrification: comparison with observations. 2005

A global off-line model of size-resolved aerosol microphysics: I. Model development and prediction of aerosol properties. 2005

A global off-line model of size-resolved aerosol microphysics: II. Identification of key uncertainties. 2005

A new coupled chemistry-climate model for the stratosphere: The importance of coupling for future O-3-climate predictions. 2005

A new software suite for NO2 vertical profile retrieval from ground-based zenith-sky spectrometers. 2005

A strategy for process-oriented validation of coupled chemistry-climate models. 2005

A three-dimensional model study of the effect of new temperature-dependent quantum yields for acetone photolysis. 2005

Arctic ozone loss and climate sensitivity: Updated three-dimensional model study. 2005

Early unusual ozone loss during the Arctic winter 2002/2003 compared to other winters. 2005

Large nitric acid trihydrate particles and denitrification caused by mountain waves in the Arctic stratosphere. 2005

NO3 vertical profile measurements from remote sensing balloon-borne spectrometers and comparison with model calculations. 2005

Retrieval of global hydrogen peroxide (H2O2) profiles using ENVISAT-MIPAS. 2005

Subtropical trace gas profiles determined by ground-based FTIR spectroscopy at Izana (28 degrees N, 16 degrees W): Five-year record, error analysis, and comparison with 3-D CTMs. 2005

Three-dimensional model study of the Antarctic ozone hole in 2002 and comparison with 2000. 2005

Three-dimensional model study of the Arctic ozone loss in 2002/2003 and comparison with 1999/2000 and 2003/2004. 2005

Arctic ozone loss and climate change. 2004

Model simulations of the northern extravortex ozone column: Influence of past changes in chemical composition. 2004

Modelling the effects of mixing processes on the composition of the free troposphere using a three-dimensional chemical transport model. 2004

Photodissociation of acetone: Atmospheric implications of temperature-dependent quantum yields. 2004

Pressure and temperature-dependent quantum yields for the photodissociation of acetone between 279 and 327.5 nm. 2004

Pressure and temperature-dependent quantum yields for the photodissociation of acetone between 279 and 327.5 nm (vol 31, art no L07110, 2004). 2004

A model study of the impact of magnetic field structure on atmospheric composition during solar proton events. 2003

A three-dimensional model study of long-term mid-high latitude lower stratosphere ozone changes. 2003

Comment on: Stratospheric Ozone Depletion at northern mid-latitudes in the 21st century: The importance of future concentrations of greenhouse gases nitrous oxide and methane. 2003

Effect of near-IR photolysis of HO2NO2 on stratospheric chemistry. 2003

Factors controlling Arctic denitrification in cold winters of the 1990s. 2003

Influence of polar ozone loss on northern midlatitude regions estimated by a high-resolution chemistry transport model during winter 1999/2000. 2003

Long-term trends of inorganic chlorine from ground-based infrared solar spectra: Past increases and evidence for stabilization. 2003

Upper limits of stratospheric IO and OIO inferred from center-to-limb-darkening-corrected balloon-borne solar occultation visible spectra: Implications for total gaseous iodine and stratospheric ozone. 2003

A characterization of the warm 1999 Arctic winter by observations and modeling: NOy partitioning and dynamics. 2002

A vortex-scale simulation of the growth and sedimentation of large nitric acid hydrate particles. 2002

Chemical depletion of Arctic ozone in winter 1999/2000. 2002

Climatology of the stratospheric BrO vertical distribution by balloon-borne UV-visible spectrometry. 2002

Comparison of measurements and model calculations of stratospheric bromine monoxide. 2002

Ground-based FTIR observations of chlorine activation and ozone depletion inside the Arctic vortex during the winter of 1999/2000. 2002

Intercomparison of BrO measurements from ERS-2 GOME, ground-based and balloon platforms. 2002

Modeling the effect of denitrification on Arctic ozone depletion during winter 1999/2000. 2002

Polar vortex concentricity as a controlling factor in Arctic denitrification. 2002

Sequential assimilation of stratospheric chemical observations in a three-dimensional model. 2002

Tracer-based determination of vortex descent in the 1999/2000 Arctic winter. 2002

A comparison of Match ozonesonde-derived and 3D model ozone loss rates in the Arctic polar vortex during the winters of 1994/95 and 1995/96. 2001

Balloon-borne DOAS measurements for the Validation of SCIAMACHY UV/Vis Data Products. 2001

Chemistry-transport model comparison with ozone observations in the midlatitude lowermost stratosphere. 2001

Comparison of measured and modeled stratospheric UV/visible actinic fluxes at large solar zenith angles. 2001

Diurnal variability and night detection of stratospheric hydroxyl radical from far infrared emission measurements. 2001

Modeling the ozone layer: A perspective on the northern hemisphere. 2001

A comparison of scavenging and deposition processes in global models: results from the WCRP Cambridge Workshop of 1995. 2000

A three-dimensional modeling study of the correlations of Pb-210 with HNO3 and peroxyacetylnitrate (PAN) at remote oceanic sites. 2000

Comparison of measured and modeled stratospheric BrO: Implications for the total amount of stratospheric bromine. 2000

First profile measurements of tropospheric BrO. 2000

Large loss of total ozone during the Arctic winter of 1999/2000. 2000

Lower stratospheric organic and inorganic bromine budget for the Arctic winter 1998/99. 2000

Modeled Arctic ozone depletion in winter 1997/1998 and comparison with previous winters. 2000

Ozone measurements during the Airborne Polar Experiment: Aircraft instrument validation, isentropic trends, and hemispheric fields prior to the 1997 Arctic ozone depletion. 2000

Seasonal observations of chlorine monoxide in the stratosphere over Antarctica during the 1996-1998 ozone holes and comparison with the SLIMCAT three-dimensional model. 2000

Stratospheric ClO across the edge of the arctic polar vortex: Measurements of the Airborne Submillimeter SIS Radiometer compared to 3-D model calculations. 2000

Temporal evolution of chlorine monoxide in the middle stratosphere. 2000

The effects of future supersonic aircraft on stratospheric chemistry modeled with varying meteorology. 2000

The effects of mixing on traces relationships in the polar vortices. 2000

A tropospheric chemical-transport model: Development and validation of the model transport schemes. 1999

Chemical ozone loss in the Arctic winter 1994/95 as determined by the Match technique. 1999

Ground based FTIR measurements of stratospheric species from Harestua, Norway during SESAME and comparison with models. 1999

Intercomparison of measured and modelled BrO slant column amounts for the Arctic winter and spring 1994/95. 1999

Measurements of stratospheric trace gas profiles at different latitudes and seasons using a new balloon-borne DOAS-instrument. 1999

Modelling NOx from lightning and its impact on global chemical fields. 1999

Multiannual simulations with a three-dimensional chemical transport model. 1999

Ozone depletion at the edge of the Arctic polar vortex 1996/1997. 1999

Relative influences of atmospheric chemistry and transport on Arctic ozone trends. 1999

Airborne remote sensing of NO2 in the Arctic winter of 1994-1995 and comparison with a three-dimensional chemical transport model. 1998

Ground-based FTIR measurements of stratospheric trace species from Aberdeen during winter and spring 1993/94 and 1994/95 and comparison with a 3D model. 1998

Ground-based FTIR measurements with high temporal resolution. 1998

Model calculations of stratospheric OBrO indicating very small abundances. 1998

Model sensitivity studies of Arctic ozone depletion. 1998

Polar stratospheric clouds climatology over Dumont d’Urville between 1989 and 1993 and the influence of volcanic aerosols on their formation. 1998

Stratosphere over Dumont d’Urville, Antarctica, in winter 1992. 1998

The impact of spatial averaging on calculated polar ozone loss – 1. Model experiments. 1998

The impact of spatial averaging on calculated polar ozone loss – 2. Theoretical analysis. 1998

Trends in stratospheric humidity and the sensitivity of ozone to these trends. 1998

Validation of an off-line three-dimensional chemical transport model using observed radon profiles – 2. Model results. 1998

A model study of the potential role of the reaction BrO+OH in the production of stratospheric HBr. 1997

Airborne heterodyne measurements of stratospheric ClO, HCl, O-3, and N2O during SESAME 1 over northern Europe. 1997

Coupled aerosol-chemical modeling of UARS HNO3 and N2O5 measurements in the arctic upper stratosphere. 1997

Effect of interannual meteorological variability on mid-latitude O-3. 1997

Evaluation and intercomparison of global atmospheric transport models using Rn-222 and other short-lived tracers. 1997

Evidence of substantial ozone depletion in winter 1995/96 over Northern Norway. 1997

Model studies of chlorine deactivation and formation of ClONO2 collar in the Arctic polar vortex. 1997

On the use of HF as a reference for the comparison of stratospheric observations and models. 1997

Prolonged stratospheric ozone loss in the 1995-96 Arctic winter. 1997

Three-dimensional chemical forecasting: A methodology. 1997

Three-dimensional studies of the 1991/1992 northern hemisphere winter using domain-filling trajectories with chemistry. 1997

Analysis of UARS data in the southern polar vortex in September 1992 using a chemical transport model. 1996

Chlorine deactivation in the lower stratospheric polar regions during late winter: Results from UARS. 1996

Dinitrogen pentoxide measurements from the improved stratospheric and mesospheric sounder: Validation of preliminary results. 1996

Heterogeneous atmospheric bromine chemistry. 1996

Measurements of stratospheric chlorine monoxide (ClO) from groundbased FTIR observations. 1996

Model calculations of ozone depletion in the Arctic polar vortex for 1991/92 to 1994/95. 1996

Stratospheric OClO measurements as a poor quantitative indicator of chlorine activation – Reply. 1996

3-DIMENSIONAL TRACER INITIALIZATION AND GENERAL DIAGNOSTICS USING EQUIVALENT PV LATITUDE-POTENTIAL-TEMPERATURE COORDINATES. 1995

Atmospheric chemistry: Measurements, mechanisms and models – General discussion. 1995

Early modelling results from the SESAME and ASHOE campaigns. 1995

Quantification of the transport of chemically activated air from the northern hemisphere polar vortex. 1995

STRATOSPHERIC OCLO MEASUREMENTS AS A POOR QUANTITATIVE INDICATOR OF CHLORINE ACTIVATION. 1995

THE POTENTIAL IMPACT OF THE REACTION OH+CLO-]HCL+O-2 ON POLAR OZONE PHOTOCHEMISTRY. 1995

THE VARIABILITY OF CLONO2 AND HNO3 IN THE ARCTIC POLAR VORTEX – COMPARISON OF TRANSALL MICHELSON INTERFEROMETER FOR PASSIVE ATMOSPHERIC SOUNDING MEASUREMENTS AND 3-DIMENSIONAL MODEL RESULTS. 1995

A 2-DIMENSIONAL MODEL STUDY OF THE QBO SIGNAL IN SAGE-II NO2 AND O3. 1994

A 3-DIMENSINAL TRANSPORT MODEL STUDY OF PSC PROCESSING DURING EASOE. 1994

A 3-DIMENSIONAL MODEL COMPARISON OF PSC PROCESSING DURING THE ARCTIC WINTERS OF 1991/1992 AND 1992/1993. 1994

A 3D TRANSPORT MODEL STUDY OF CHLORINE ACTIVATION DURING EASOE. 1994

1ST RESULTS FROM A 3-DIMENSIONAL MIDDLE ATMOSPHERE MODEL. 1993

A 3-DIMENSIONAL MODELING STUDY OF TRACE SPECIES IN THE ARCTIC LOWER STRATOSPHERE DURING WINTER 1989-1990. 1993

OZONE DEPLETION – SATELLITE MAPS OZONE DESTROYER. 1993

1ST RESULTS FROM A 3-DIMENSIONAL MIDDLE ATMOSPHERE MODEL. 1992

2-DIMENSIONAL MODEL STUDIES OF THE INTERANNUAL VARIABILITY OF TRACE GASES IN THE MIDDLE ATMOSPHERE. 1992

ATMOSPHERIC CHEMISTRY – STRATOSPHERIC OZONE DEPLETION OVER THE ARCTIC. 1991

2-DIMENSIONAL MODELING OF THE NORTHERN-HEMISPHERE HIGH-LATITUDE LOWER STRATOSPHERE. 1990

ON THE INTERANNUAL VARIABILITY OF TRACE GASES IN THE MIDDLE ATMOSPHERE. 1990

TWO-DIMENSIONAL MODELING OF THE ANTARCTIC LOWER STRATOSPHERE. 1988

Contact details

M.Chipperfield@leeds.ac.uk