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View article: Conditions Necessary for Chlorine Activation in the Midlatitude Summer Lower Stratosphere
Conditions Necessary for Chlorine Activation in the Midlatitude Summer Lower Stratosphere Open
Studies have suggested that ClO could be enhanced within convectively influenced air masses in the North American Monsoon Anticyclone due to low temperature and elevated water mixing ratio conditions that are conducive to chlorine activati…
View article: Observationally Constrained NO <sub>x</sub> ‐Catalyzed Ozone Production in the Upper Troposphere During the Asian Summer Monsoon
Observationally Constrained NO <sub>x</sub> ‐Catalyzed Ozone Production in the Upper Troposphere During the Asian Summer Monsoon Open
Intense and frequent convection occurring during the Asian Summer Monsoon (ASM) rapidly transports surface emissions to the upper troposphere (UT). Depending on their chemical reactivities, pollutants transported to the UT via this mechani…
View article: The Asian Summer Monsoon Chemical and Climate Impact Project (ACCLIP): An Overview
The Asian Summer Monsoon Chemical and Climate Impact Project (ACCLIP): An Overview Open
View article: Aircraft observations of biomass burning pollutants in the equatorial lower stratosphere over the tropical western Pacific during boreal winter
Aircraft observations of biomass burning pollutants in the equatorial lower stratosphere over the tropical western Pacific during boreal winter Open
Recent studies hypothesize that emissions from fires reaching the stratosphere can provide aerosols and aerosol precursors that initiate stratospheric ozone loss and lead to radiative heating of the stratosphere and cooling of the surface.…
View article: Highlighting the Impact of Anthropogenic OCS Emissions on the Stratospheric Sulfur Budget With In Situ Observations
Highlighting the Impact of Anthropogenic OCS Emissions on the Stratospheric Sulfur Budget With In Situ Observations Open
Carbonyl sulfide (OCS) is an important atmospheric sulfur species that plays a dominant role in the formation of (nonvolcanic) stratospheric sulfate aerosol in the middle stratosphere. Major uncertainties in surface sources and sinks and i…
View article: Transport by Asian Summer Monsoon Convection to the Upper Troposphere and Lower Stratosphere During ACCLIP (2022)
Transport by Asian Summer Monsoon Convection to the Upper Troposphere and Lower Stratosphere During ACCLIP (2022) Open
The Asian Summer Monsoon (ASM) has garnered attention in recent years for its impacts on the composition of the upper troposphere and lower stratosphere (UTLS) via deep convection. A recent observational effort into this mechanism, the Asi…
View article: Asian Summer Monsoon Anticyclone—The Primary Entryway for Chlorinated Very‐Short‐Lived Substances to the Stratosphere
Asian Summer Monsoon Anticyclone—The Primary Entryway for Chlorinated Very‐Short‐Lived Substances to the Stratosphere Open
Rapid growing emissions of dichloromethane (CH 2 Cl 2 ), a chlorinated very‐short‐lived substance (Cl‐VSLS) and an ozone depleting substance (ODS), has raised concerns as this increase offset a part of the stratospheric chlorine (Cl) reduc…
View article: Aircraft Observations of Continental Pollution In the Equatorial Lower Stratosphere over the Tropical Western Pacific During Boreal Winter
Aircraft Observations of Continental Pollution In the Equatorial Lower Stratosphere over the Tropical Western Pacific During Boreal Winter Open
Recent studies hypothesize that emissions from fires reaching the stratosphere can provide aerosols and aerosol precursors that initiate stratospheric ozone loss and lead to radiative heating of the stratosphere and cooling of the surface.…
View article: On the atmospheric budget of 1,2-dichloroethane and its impact on stratospheric chlorine and ozone (2002–2020)
On the atmospheric budget of 1,2-dichloroethane and its impact on stratospheric chlorine and ozone (2002–2020) Open
The chemical compound 1,2-dichloroethane (DCE), or ethylene dichloride, is an industrial very short-lived substance (VSLS) whose major use is as a feedstock in the production chain of polyvinyl chloride (PVC). Like other chlorinated VSLSs,…
View article: Chloromethanes in the North American Troposphere and Lower Stratosphere Over the Past Two Decades
Chloromethanes in the North American Troposphere and Lower Stratosphere Over the Past Two Decades Open
Aircraft observations of the four chloromethanes: carbon tetrachloride (CCl 4 ), methyl chloride (CH 3 Cl), dichloromethane (CH 2 Cl 2 ), and chloroform (CHCl 3 ), collected over North America between 2000 and 2022, were used to evaluate t…
View article: Airborne observations of upper troposphere and lower stratosphere composition change in active convection producing above-anvil cirrus plumes
Airborne observations of upper troposphere and lower stratosphere composition change in active convection producing above-anvil cirrus plumes Open
Tropopause-overshooting convection in the midlatitudes provides a rapid transport pathway for air from the lower troposphere to reach the upper troposphere and lower stratosphere (UTLS) and can result in the formation of above-anvil cirrus…
View article: East Asian summer monsoon delivers large abundances of very short-lived organic chlorine substances to the lower stratosphere
East Asian summer monsoon delivers large abundances of very short-lived organic chlorine substances to the lower stratosphere Open
Deep convection in the Asian summer monsoon is a significant transport process for lifting pollutants from the planetary boundary layer to the tropopause level. This process enables efficient injection into the stratosphere of reactive spe…
View article: On the atmospheric budget of ethylene dichloride and its impact on stratospheric chlorine and ozone (2002–2020)
On the atmospheric budget of ethylene dichloride and its impact on stratospheric chlorine and ozone (2002–2020) Open
Ethylene dichloride (EDC), or 1-2-dichloroethane, is an industrial very short-lived substance (VSLS) whose major use is as a feedstock in the production chain of polyvinyl chloride (PVC). Like other chlorinated VSLS, transport of EDC (or i…
View article: Supplementary material to "On the atmospheric budget of ethylene dichloride and its impact on stratospheric chlorine and ozone (2002–2020)"
Supplementary material to "On the atmospheric budget of ethylene dichloride and its impact on stratospheric chlorine and ozone (2002–2020)" Open
View article: Improving the in situ observation-based long-term record of stratospheric age of air&#160;
Improving the in situ observation-based long-term record of stratospheric age of air  Open
Stratospheric mean age of air is an important metric and much-used proxy for the speed of the residual overturning circulation in the stratosphere. Much effort has been put into better constraining observation-based estimates of age of air…
View article: Pan-Atlantic connectivity of marine biogeochemical and ecological processes and the impact of anthropogenic pressures
Pan-Atlantic connectivity of marine biogeochemical and ecological processes and the impact of anthropogenic pressures Open
B. Quack, D. Arevalo, H. Bange, K. Becker, W. Böhme, D. Booge, A. Engel, H. Hepach, R. Ingeniero, J. Karnatz, C. Marandino, T. Müller, B. Pontiller, L. Scheidemann, M. Hieronymi, R. Röttgers, G. Schulz, T. Bösch, M. Latsch, F. Wittrock, R.…
View article: Evaluating the Model Representation of Asian Summer Monsoon Upper Troposphere and Lower Stratosphere Transport and Composition Using Airborne In Situ Observations
Evaluating the Model Representation of Asian Summer Monsoon Upper Troposphere and Lower Stratosphere Transport and Composition Using Airborne In Situ Observations Open
Chemistry Climate Models (CCMs) are essential tools for characterizing and predicting the role of atmospheric composition and chemistry in Earth's climate system. This study demonstrates the use of airborne in situ observations to diagnose…
View article: Comment on egusphere-2023-2603
Comment on egusphere-2023-2603 Open
Abstract. Tropopause-overshooting convection in the midlatitudes provides a rapid transport pathway for air from the lower troposphere to reach the upper troposphere and lower stratosphere (UTLS), and can result in the for…
View article: Detailed Examination of Upper Troposphere Lower Stratosphere Composition Change from DCOTSS Airborne Observations of Active Convection on 31 May 2022
Detailed Examination of Upper Troposphere Lower Stratosphere Composition Change from DCOTSS Airborne Observations of Active Convection on 31 May 2022 Open
Tropopause-overshooting convection in the midlatitudes provides a rapid transport pathway for air from the lower troposphere to reach the upper troposphere and lower stratosphere (UTLS), and can result in the formation of above-anvil cirru…
View article: Intercomparison of Atmospheric Carbonyl Sulfide (TransCom‐COS): 2. Evaluation of Optimized Fluxes Using Ground‐Based and Aircraft Observations
Intercomparison of Atmospheric Carbonyl Sulfide (TransCom‐COS): 2. Evaluation of Optimized Fluxes Using Ground‐Based and Aircraft Observations Open
We present a comparison of atmospheric transport models that simulate carbonyl sulfide (COS). This is part II of the ongoing Atmospheric Transport Model Inter‐comparison Project (TransCom–COS). Differently from part I, we focus on seven mo…
View article: Evaluating the Model Representation of Asian Summer Monsoon UTLS Transport and Composition using Airborne In Situ Observations
Evaluating the Model Representation of Asian Summer Monsoon UTLS Transport and Composition using Airborne In Situ Observations Open
Chemistry transport models (CTMs) are essential tools for characterizing and predicting the role of atmospheric composition and chemistry in Earth’s climate system. This study demonstrates the use of airborne in situ observations to diagno…
View article: Intercomparison of atmospheric carbonyl sulfide (TransCom-COS; Part Two): Evaluation of optimized fluxes using ground-based and aircraft observations
Intercomparison of atmospheric carbonyl sulfide (TransCom-COS; Part Two): Evaluation of optimized fluxes using ground-based and aircraft observations Open
We present a comparison of atmospheric transport models that simulate carbonyl sulfide (COS). This is part II of the ongoing Atmospheric Transport Model (ATM) Inter-comparison Project (TransCom–COS). Differently from part I, we focus on se…
View article: N2O Temporal Variability from the Middle Troposphere to the Middle Stratosphere Based on Airborne and Balloon-Borne Observations during the Period 1987–2018
N2O Temporal Variability from the Middle Troposphere to the Middle Stratosphere Based on Airborne and Balloon-Borne Observations during the Period 1987–2018 Open
Nitrous oxide (N2O) is the fourth most important greenhouse gas in the atmosphere and is considered the most important current source gas emission for global stratospheric ozone depletion (O3). It has natural and anthropogenic sources, mai…
View article: Estimation of dichloromethane emissions in East Asia using recent high-altitude aircraft observations and synthesis inversion
Estimation of dichloromethane emissions in East Asia using recent high-altitude aircraft observations and synthesis inversion Open
Although the Montreal Protocol has been successful in reducing the emissions of long-lived ozone-depleting substances, certain unregulated, chlorinated very short-lived substances (VSLS, lifetimes < 6 months) are believed to be having an i…
View article: Organic trace gases collected using the Whole Air Sampler over North America (summer 2021, 2022), in the UTLS region, targeting deep convective regions
Organic trace gases collected using the Whole Air Sampler over North America (summer 2021, 2022), in the UTLS region, targeting deep convective regions Open
Whole Air Samples (WAS) were collected as part of the Dynamics and Chemistry of the Summer Stratosphere (DCOTSS) field campaign in the Upper Troposphere-Lower Stratosphere (UTLS) region during Summer 2021 and 2022. Grid-Rad and satellite i…
View article: The Dynamical Background to the 2022 Asian Summer Monsoon Chemical and Climate Impacts Project (ACCLIP)
The Dynamical Background to the 2022 Asian Summer Monsoon Chemical and Climate Impacts Project (ACCLIP) Open
The Asian summer monsoon Chemical and Climate Impact Project (ACCLIP) used the NSF/NCAR Gulfstream V (GV) research aircraft, the NASA WB-57f research aircraft, the Korean NARA King Air, and a broad set of balloon launches to investigate at…
View article: Impact of convection on trace gas composition during the summer monsoon season downwind of East Asia and over central North America
Impact of convection on trace gas composition during the summer monsoon season downwind of East Asia and over central North America Open
Airborne research missions were conducted during the summer season over the Western Pacific downwind of the Asian summer monsoon (ACCLIP, Asian Summer Monsoon Chemical & CLimate Impact Project, Aug/Sept., 2022) and over central N. America …
View article: Global seasonal distribution of CH2Br2 and CHBr3 in the upper troposphere and lower stratosphere
Global seasonal distribution of CH2Br2 and CHBr3 in the upper troposphere and lower stratosphere Open
Halogens from long-lived anthropogenic substances contribute to the depletion of stratospheric ozone. Besides these long-lived substances, chlorinated and brominated substances with lifetimes of less than 6 months are additional …
View article: Halocarbon dynamics from Las Palmas to Guayaquil in winter 2021/2022 – Results of SO287-CONNECT
Halocarbon dynamics from Las Palmas to Guayaquil in winter 2021/2022 – Results of SO287-CONNECT Open
Short-lived bromo-, chloro- and iodocarbons from marine and anthropogenic sources contribute to the atmospheric halogen budgets and to ozone depletion in the troposphere and stratosphere. Their spatial variations are poorly known, given th…
View article: Distribution of organic halogen and hydrocarbon trace gases in the UTLS in the northwestern Pacific from samples collected by the Whole Air Samplers during the ACCLIP campaign
Distribution of organic halogen and hydrocarbon trace gases in the UTLS in the northwestern Pacific from samples collected by the Whole Air Samplers during the ACCLIP campaign Open
<p>One of the scientific objectives of the Asian Summer Monsoon Chemical & CLimate Impact Project (ACCLIP) project was to sample the chemical content of air processed in the Asian Summer Monsoon (ASM) to ascertain its role in UTL…