Cross-polar transport and scavenging of Siberian aerosols containing black carbon during the 2012 ACCESS summer campaign
During the ACCESS airborne campaign in July 2012, extensive boreal forest fires resulted in significant aerosol transport to the Arctic. A 10-day episode combining intense biomass burning over Siberia and low-pressure systems over the Arctic Ocean resulted in efficient transport of plumes containing...
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Online Access: | http://www.osti.gov/servlets/purl/1393750 https://www.osti.gov/biblio/1393750 https://doi.org/10.5194/acp-17-10969-2017 |
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ftosti:oai:osti.gov:1393750 2023-07-30T04:01:13+02:00 Cross-polar transport and scavenging of Siberian aerosols containing black carbon during the 2012 ACCESS summer campaign Raut, Jean -Christophe Marelle, Louis Fast, Jerome D. Thomas, Jennie L. Weinzierl, Bernadett Law, Katharine S. Berg, Larry K. Roiger, Anke Easter, Richard C. Heimerl, Katharina Onishi, Tatsuo Delanoe, Julien Schlager, Hans 2023-06-27 application/pdf http://www.osti.gov/servlets/purl/1393750 https://www.osti.gov/biblio/1393750 https://doi.org/10.5194/acp-17-10969-2017 unknown http://www.osti.gov/servlets/purl/1393750 https://www.osti.gov/biblio/1393750 https://doi.org/10.5194/acp-17-10969-2017 doi:10.5194/acp-17-10969-2017 54 ENVIRONMENTAL SCIENCES 2023 ftosti https://doi.org/10.5194/acp-17-10969-2017 2023-07-11T09:21:19Z During the ACCESS airborne campaign in July 2012, extensive boreal forest fires resulted in significant aerosol transport to the Arctic. A 10-day episode combining intense biomass burning over Siberia and low-pressure systems over the Arctic Ocean resulted in efficient transport of plumes containing black carbon (BC) towards the Arctic, mostly in the upper troposphere (6–8 km). Here, a combination of in situ observations (DLR Falcon aircraft), satellite analysis and WRF-Chem simulations is used to understand the vertical and horizontal transport mechanisms of BC with a focus on the role of wet removal. Between the northwestern Norwegian coast and the Svalbard archipelago, the Falcon aircraft sampled plumes with enhanced CO concentrations up to 200 ppbv and BC mixing ratios up to 25 ng kg –1 . During transport to the Arctic region, a large fraction of BC particles are scavenged by two wet deposition processes, namely wet removal by large-scale precipitation and removal in wet convective updrafts, with both processes contributing almost equally to the total accumulated deposition of BC. Our results underline that applying a finer horizontal resolution (40 instead of 100 km) improves the model performance, as it significantly reduces the overestimation of BC levels observed at a coarser resolution in the mid-troposphere. According to the simulations at 40 km, the transport efficiency of BC (TE BC ) in biomass burning plumes was larger (60 %), because it was impacted by small accumulated precipitation along trajectory (1 mm). In contrast TE BC was small (< 30 %) and accumulated precipitation amounts were larger (5–10 mm) in plumes influenced by urban anthropogenic sources and flaring activities in northern Russia, resulting in transport to lower altitudes. TE BC due to large-scale precipitation is responsible for a sharp meridional gradient in the distribution of BC concentrations. Wet removal in cumulus clouds is the cause of modeled vertical gradient of TE BC , especially in the mid-latitudes, reflecting the ... Other/Unknown Material Arctic Arctic Ocean black carbon Svalbard Siberia SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Arctic Ocean Svalbard Svalbard Archipelago Atmospheric Chemistry and Physics 17 18 10969 10995 |
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 Raut, Jean -Christophe Marelle, Louis Fast, Jerome D. Thomas, Jennie L. Weinzierl, Bernadett Law, Katharine S. Berg, Larry K. Roiger, Anke Easter, Richard C. Heimerl, Katharina Onishi, Tatsuo Delanoe, Julien Schlager, Hans Cross-polar transport and scavenging of Siberian aerosols containing black carbon during the 2012 ACCESS summer campaign |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
During the ACCESS airborne campaign in July 2012, extensive boreal forest fires resulted in significant aerosol transport to the Arctic. A 10-day episode combining intense biomass burning over Siberia and low-pressure systems over the Arctic Ocean resulted in efficient transport of plumes containing black carbon (BC) towards the Arctic, mostly in the upper troposphere (6–8 km). Here, a combination of in situ observations (DLR Falcon aircraft), satellite analysis and WRF-Chem simulations is used to understand the vertical and horizontal transport mechanisms of BC with a focus on the role of wet removal. Between the northwestern Norwegian coast and the Svalbard archipelago, the Falcon aircraft sampled plumes with enhanced CO concentrations up to 200 ppbv and BC mixing ratios up to 25 ng kg –1 . During transport to the Arctic region, a large fraction of BC particles are scavenged by two wet deposition processes, namely wet removal by large-scale precipitation and removal in wet convective updrafts, with both processes contributing almost equally to the total accumulated deposition of BC. Our results underline that applying a finer horizontal resolution (40 instead of 100 km) improves the model performance, as it significantly reduces the overestimation of BC levels observed at a coarser resolution in the mid-troposphere. According to the simulations at 40 km, the transport efficiency of BC (TE BC ) in biomass burning plumes was larger (60 %), because it was impacted by small accumulated precipitation along trajectory (1 mm). In contrast TE BC was small (< 30 %) and accumulated precipitation amounts were larger (5–10 mm) in plumes influenced by urban anthropogenic sources and flaring activities in northern Russia, resulting in transport to lower altitudes. TE BC due to large-scale precipitation is responsible for a sharp meridional gradient in the distribution of BC concentrations. Wet removal in cumulus clouds is the cause of modeled vertical gradient of TE BC , especially in the mid-latitudes, reflecting the ... |
author |
Raut, Jean -Christophe Marelle, Louis Fast, Jerome D. Thomas, Jennie L. Weinzierl, Bernadett Law, Katharine S. Berg, Larry K. Roiger, Anke Easter, Richard C. Heimerl, Katharina Onishi, Tatsuo Delanoe, Julien Schlager, Hans |
author_facet |
Raut, Jean -Christophe Marelle, Louis Fast, Jerome D. Thomas, Jennie L. Weinzierl, Bernadett Law, Katharine S. Berg, Larry K. Roiger, Anke Easter, Richard C. Heimerl, Katharina Onishi, Tatsuo Delanoe, Julien Schlager, Hans |
author_sort |
Raut, Jean -Christophe |
title |
Cross-polar transport and scavenging of Siberian aerosols containing black carbon during the 2012 ACCESS summer campaign |
title_short |
Cross-polar transport and scavenging of Siberian aerosols containing black carbon during the 2012 ACCESS summer campaign |
title_full |
Cross-polar transport and scavenging of Siberian aerosols containing black carbon during the 2012 ACCESS summer campaign |
title_fullStr |
Cross-polar transport and scavenging of Siberian aerosols containing black carbon during the 2012 ACCESS summer campaign |
title_full_unstemmed |
Cross-polar transport and scavenging of Siberian aerosols containing black carbon during the 2012 ACCESS summer campaign |
title_sort |
cross-polar transport and scavenging of siberian aerosols containing black carbon during the 2012 access summer campaign |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1393750 https://www.osti.gov/biblio/1393750 https://doi.org/10.5194/acp-17-10969-2017 |
geographic |
Arctic Arctic Ocean Svalbard Svalbard Archipelago |
geographic_facet |
Arctic Arctic Ocean Svalbard Svalbard Archipelago |
genre |
Arctic Arctic Ocean black carbon Svalbard Siberia |
genre_facet |
Arctic Arctic Ocean black carbon Svalbard Siberia |
op_relation |
http://www.osti.gov/servlets/purl/1393750 https://www.osti.gov/biblio/1393750 https://doi.org/10.5194/acp-17-10969-2017 doi:10.5194/acp-17-10969-2017 |
op_doi |
https://doi.org/10.5194/acp-17-10969-2017 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
17 |
container_issue |
18 |
container_start_page |
10969 |
op_container_end_page |
10995 |
_version_ |
1772811968827097088 |