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...

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Published in:Journal of Geophysical Research: Atmospheres
Main Authors: Mahmood, Rashed, von Salzen, Knut, Flanner, Mark, Sand, Maria, Langner, Joakim, Wang, Hailong, Huang, Lin
Language:unknown
Published: 2021
Subjects:
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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spelling 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
institution Open Polar
collection SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
op_collection_id ftosti
language unknown
topic 54 ENVIRONMENTAL SCIENCES
spellingShingle 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
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