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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ftdoajarticles:oai:doaj.org/article:f14cb84dd97241fda050403e3b85cf2b 2023-05-15T14:52:58+02:00 Cross-polar transport and scavenging of Siberian aerosols containing black carbon during the 2012 ACCESS summer campaign J.-C. Raut L. Marelle J. D. Fast J. L. Thomas B. Weinzierl K. S. Law L. K. Berg A. Roiger R. C. Easter K. Heimerl T. Onishi J. Delanoë H. Schlager 2017-09-01T00:00:00Z https://doi.org/10.5194/acp-17-10969-2017 https://doaj.org/article/f14cb84dd97241fda050403e3b85cf2b EN eng Copernicus Publications https://www.atmos-chem-phys.net/17/10969/2017/acp-17-10969-2017.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-17-10969-2017 1680-7316 1680-7324 https://doaj.org/article/f14cb84dd97241fda050403e3b85cf2b Atmospheric Chemistry and Physics, Vol 17, Pp 10969-10995 (2017) Physics QC1-999 Chemistry QD1-999 article 2017 ftdoajarticles https://doi.org/10.5194/acp-17-10969-2017 2022-12-31T01:33:23Z 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). 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 ... Article in Journal/Newspaper Arctic Arctic Ocean black carbon Svalbard Siberia Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Svalbard Svalbard Archipelago Atmospheric Chemistry and Physics 17 18 10969 10995 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 J.-C. Raut L. Marelle J. D. Fast J. L. Thomas B. Weinzierl K. S. Law L. K. Berg A. Roiger R. C. Easter K. Heimerl T. Onishi J. Delanoë H. Schlager Cross-polar transport and scavenging of Siberian aerosols containing black carbon during the 2012 ACCESS summer campaign |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
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). 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 ... |
format |
Article in Journal/Newspaper |
author |
J.-C. Raut L. Marelle J. D. Fast J. L. Thomas B. Weinzierl K. S. Law L. K. Berg A. Roiger R. C. Easter K. Heimerl T. Onishi J. Delanoë H. Schlager |
author_facet |
J.-C. Raut L. Marelle J. D. Fast J. L. Thomas B. Weinzierl K. S. Law L. K. Berg A. Roiger R. C. Easter K. Heimerl T. Onishi J. Delanoë H. Schlager |
author_sort |
J.-C. Raut |
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 |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/acp-17-10969-2017 https://doaj.org/article/f14cb84dd97241fda050403e3b85cf2b |
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_source |
Atmospheric Chemistry and Physics, Vol 17, Pp 10969-10995 (2017) |
op_relation |
https://www.atmos-chem-phys.net/17/10969/2017/acp-17-10969-2017.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-17-10969-2017 1680-7316 1680-7324 https://doaj.org/article/f14cb84dd97241fda050403e3b85cf2b |
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 |
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1766324370754502656 |