Seasonality of global and Arctic black carbon processes in the Arctic Monitoring and Assessment Programme models
This study quantifies black carbon (BC) processes in three global climate models and one chemistry transport model, with focus on the seasonality of BC transport, emissions, wet and dry deposition in the Arctic. In the models, transport of BC to the Arctic from lower latitudes is the major BC source...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | http://www.osti.gov/servlets/purl/1324902 https://www.osti.gov/biblio/1324902 https://doi.org/10.1002/2016JD024849 |
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ftosti:oai:osti.gov:1324902 2023-07-30T04:00:22+02:00 Seasonality of global and Arctic black carbon processes in the Arctic Monitoring and Assessment Programme models Mahmood, Rashed von Salzen, Knut Flanner, Mark Sand, Maria Langner, Joakim Wang, Hailong Huang, Lin 2021-12-30 application/pdf http://www.osti.gov/servlets/purl/1324902 https://www.osti.gov/biblio/1324902 https://doi.org/10.1002/2016JD024849 unknown http://www.osti.gov/servlets/purl/1324902 https://www.osti.gov/biblio/1324902 https://doi.org/10.1002/2016JD024849 doi:10.1002/2016JD024849 54 ENVIRONMENTAL SCIENCES 2021 ftosti https://doi.org/10.1002/2016JD024849 2023-07-11T09:15:18Z This study quantifies black carbon (BC) processes in three global climate models and one chemistry transport model, with focus on the seasonality of BC transport, emissions, wet and dry deposition in the Arctic. In the models, transport of BC to the Arctic from lower latitudes is the major BC source for this region while Arctic emissions are very small. All models simulated a similar annual cycle of BC transport from lower latitudes to the Arctic, with maximum transport occurring in July. Substantial differences were found in simulated BC burdens and vertical distributions, with CanAM (NorESM) producing the strongest (weakest) seasonal cycle. CanAM also has the shortest annual mean residence time for BC in the Arctic followed by SMHI-MATCH, CESM and NorESM. The relative contribution of wet and dry deposition rates in removing BC varies seasonally and is one of the major factors causing seasonal variations in BC burdens in the Arctic. Overall, considerable differences in wet deposition efficiencies in the models exist and are a leading cause of differences in simulated BC burdens. Results from model sensitivity experiments indicate that scavenging of BC in convective clouds acts to substantially increase the overall efficiency of BC wet deposition in the Arctic, which leads to low BC burdens and a more pronounced seasonal cycle compared to simulations without convective BC scavenging. In contrast, the simulated seasonality of BC concentrations in the upper troposphere is only weakly influenced by wet deposition in stratiform (layer) clouds whereas lower tropospheric concentrations are highly sensitive. Other/Unknown Material Arctic black carbon SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Journal of Geophysical Research: Atmospheres 121 12 7100 7116 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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54 ENVIRONMENTAL SCIENCES |
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54 ENVIRONMENTAL SCIENCES Mahmood, Rashed von Salzen, Knut Flanner, Mark Sand, Maria Langner, Joakim Wang, Hailong Huang, Lin Seasonality of global and Arctic black carbon processes in the Arctic Monitoring and Assessment Programme models |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
This study quantifies black carbon (BC) processes in three global climate models and one chemistry transport model, with focus on the seasonality of BC transport, emissions, wet and dry deposition in the Arctic. In the models, transport of BC to the Arctic from lower latitudes is the major BC source for this region while Arctic emissions are very small. All models simulated a similar annual cycle of BC transport from lower latitudes to the Arctic, with maximum transport occurring in July. Substantial differences were found in simulated BC burdens and vertical distributions, with CanAM (NorESM) producing the strongest (weakest) seasonal cycle. CanAM also has the shortest annual mean residence time for BC in the Arctic followed by SMHI-MATCH, CESM and NorESM. The relative contribution of wet and dry deposition rates in removing BC varies seasonally and is one of the major factors causing seasonal variations in BC burdens in the Arctic. Overall, considerable differences in wet deposition efficiencies in the models exist and are a leading cause of differences in simulated BC burdens. Results from model sensitivity experiments indicate that scavenging of BC in convective clouds acts to substantially increase the overall efficiency of BC wet deposition in the Arctic, which leads to low BC burdens and a more pronounced seasonal cycle compared to simulations without convective BC scavenging. In contrast, the simulated seasonality of BC concentrations in the upper troposphere is only weakly influenced by wet deposition in stratiform (layer) clouds whereas lower tropospheric concentrations are highly sensitive. |
author |
Mahmood, Rashed von Salzen, Knut Flanner, Mark Sand, Maria Langner, Joakim Wang, Hailong Huang, Lin |
author_facet |
Mahmood, Rashed von Salzen, Knut Flanner, Mark Sand, Maria Langner, Joakim Wang, Hailong Huang, Lin |
author_sort |
Mahmood, Rashed |
title |
Seasonality of global and Arctic black carbon processes in the Arctic Monitoring and Assessment Programme models |
title_short |
Seasonality of global and Arctic black carbon processes in the Arctic Monitoring and Assessment Programme models |
title_full |
Seasonality of global and Arctic black carbon processes in the Arctic Monitoring and Assessment Programme models |
title_fullStr |
Seasonality of global and Arctic black carbon processes in the Arctic Monitoring and Assessment Programme models |
title_full_unstemmed |
Seasonality of global and Arctic black carbon processes in the Arctic Monitoring and Assessment Programme models |
title_sort |
seasonality of global and arctic black carbon processes in the arctic monitoring and assessment programme models |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/1324902 https://www.osti.gov/biblio/1324902 https://doi.org/10.1002/2016JD024849 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic black carbon |
genre_facet |
Arctic black carbon |
op_relation |
http://www.osti.gov/servlets/purl/1324902 https://www.osti.gov/biblio/1324902 https://doi.org/10.1002/2016JD024849 doi:10.1002/2016JD024849 |
op_doi |
https://doi.org/10.1002/2016JD024849 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
121 |
container_issue |
12 |
container_start_page |
7100 |
op_container_end_page |
7116 |
_version_ |
1772810876716318720 |