Measurement of black carbon at Syowa station, Antarctica: seasonal variation, transport processes and pathways
International audience Measurement of black carbon (BC) was carried out at Syowa station Antarctica (69° S, 39° E) from February 2004 until January 2007. The BC concentration at Syowa ranged from below detection to 176 ng m ?3 during the measurements. Higher BC concentrations were observed mostly un...
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ftinsu:oai:HAL:hal-00304203v1 2023-11-12T04:00:59+01:00 Measurement of black carbon at Syowa station, Antarctica: seasonal variation, transport processes and pathways Hara, K. Osada, K. Yabuki, M. Hayashi, M. Yamanouchi, T. Shiobara, M. Wada, M. National Institute of Polar Research Tokyo (NiPR) Department of Earth System Science and Technology Fukuoka (ESST) Kyushu University Environmental Science 2008-05-28 https://hal.science/hal-00304203 https://hal.science/hal-00304203/document https://hal.science/hal-00304203/file/acpd-8-9883-2008.pdf en eng HAL CCSD European Geosciences Union hal-00304203 https://hal.science/hal-00304203 https://hal.science/hal-00304203/document https://hal.science/hal-00304203/file/acpd-8-9883-2008.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00304203 Atmospheric Chemistry and Physics Discussions, 2008, 8 (3), pp.9883-9929 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2008 ftinsu 2023-10-25T16:26:12Z International audience Measurement of black carbon (BC) was carried out at Syowa station Antarctica (69° S, 39° E) from February 2004 until January 2007. The BC concentration at Syowa ranged from below detection to 176 ng m ?3 during the measurements. Higher BC concentrations were observed mostly under strong wind (blizzard) conditions due to the approach of a cyclone and blocking event. The BC-rich air masses traveled from the lower troposphere of the Atlantic and Indian Oceans to Syowa (Antarctic coast). During the summer (November?February), the BC concentration showed a diurnal variation together with surface wind speed and increased in the katabatic wind from the Antarctic continent. Considering the low BC source strength in the Antarctic continent, the higher BC concentration in the continental air (katabatic wind) might be caused by long range transport of BC via the free troposphere from mid- and low- latitudes. The seasonal variation of BC at Syowa had a maximum in August, while at the other coastal stations (Halley, Neumayer, and Ferraz) and the continental station (Amundsen-Scott), the maximum occurred in October. This difference may result from different transport pathways and scavenging of BC by precipitation during the transport from the source regions. During the austral summer, long-range transport of BC via the free troposphere is likely to make an important contribution to the ambient BC concentration. The BC transport flux indicated that BC injection into the Antarctic region strongly depended on the frequency of storm (blizzard) conditions. The seasonal variation of BC transport flux increased by 290 mg m ?2 month ?1 in winter?spring when blizzards frequently occurred, whereas the flux decreased to lower than 50 mg m ?2 month ?1 in the summer with infrequent blizzards. Article in Journal/Newspaper Amundsen-Scott Antarc* Antarctic Antarctica Institut national des sciences de l'Univers: HAL-INSU Antarctic The Antarctic Austral Neumayer Syowa Station Indian Amundsen-Scott ENVELOPE(0.000,0.000,-90.000,-90.000) Ferraz ENVELOPE(-64.117,-64.117,-65.117,-65.117) |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Hara, K. Osada, K. Yabuki, M. Hayashi, M. Yamanouchi, T. Shiobara, M. Wada, M. Measurement of black carbon at Syowa station, Antarctica: seasonal variation, transport processes and pathways |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Measurement of black carbon (BC) was carried out at Syowa station Antarctica (69° S, 39° E) from February 2004 until January 2007. The BC concentration at Syowa ranged from below detection to 176 ng m ?3 during the measurements. Higher BC concentrations were observed mostly under strong wind (blizzard) conditions due to the approach of a cyclone and blocking event. The BC-rich air masses traveled from the lower troposphere of the Atlantic and Indian Oceans to Syowa (Antarctic coast). During the summer (November?February), the BC concentration showed a diurnal variation together with surface wind speed and increased in the katabatic wind from the Antarctic continent. Considering the low BC source strength in the Antarctic continent, the higher BC concentration in the continental air (katabatic wind) might be caused by long range transport of BC via the free troposphere from mid- and low- latitudes. The seasonal variation of BC at Syowa had a maximum in August, while at the other coastal stations (Halley, Neumayer, and Ferraz) and the continental station (Amundsen-Scott), the maximum occurred in October. This difference may result from different transport pathways and scavenging of BC by precipitation during the transport from the source regions. During the austral summer, long-range transport of BC via the free troposphere is likely to make an important contribution to the ambient BC concentration. The BC transport flux indicated that BC injection into the Antarctic region strongly depended on the frequency of storm (blizzard) conditions. The seasonal variation of BC transport flux increased by 290 mg m ?2 month ?1 in winter?spring when blizzards frequently occurred, whereas the flux decreased to lower than 50 mg m ?2 month ?1 in the summer with infrequent blizzards. |
author2 |
National Institute of Polar Research Tokyo (NiPR) Department of Earth System Science and Technology Fukuoka (ESST) Kyushu University Environmental Science |
format |
Article in Journal/Newspaper |
author |
Hara, K. Osada, K. Yabuki, M. Hayashi, M. Yamanouchi, T. Shiobara, M. Wada, M. |
author_facet |
Hara, K. Osada, K. Yabuki, M. Hayashi, M. Yamanouchi, T. Shiobara, M. Wada, M. |
author_sort |
Hara, K. |
title |
Measurement of black carbon at Syowa station, Antarctica: seasonal variation, transport processes and pathways |
title_short |
Measurement of black carbon at Syowa station, Antarctica: seasonal variation, transport processes and pathways |
title_full |
Measurement of black carbon at Syowa station, Antarctica: seasonal variation, transport processes and pathways |
title_fullStr |
Measurement of black carbon at Syowa station, Antarctica: seasonal variation, transport processes and pathways |
title_full_unstemmed |
Measurement of black carbon at Syowa station, Antarctica: seasonal variation, transport processes and pathways |
title_sort |
measurement of black carbon at syowa station, antarctica: seasonal variation, transport processes and pathways |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/hal-00304203 https://hal.science/hal-00304203/document https://hal.science/hal-00304203/file/acpd-8-9883-2008.pdf |
long_lat |
ENVELOPE(0.000,0.000,-90.000,-90.000) ENVELOPE(-64.117,-64.117,-65.117,-65.117) |
geographic |
Antarctic The Antarctic Austral Neumayer Syowa Station Indian Amundsen-Scott Ferraz |
geographic_facet |
Antarctic The Antarctic Austral Neumayer Syowa Station Indian Amundsen-Scott Ferraz |
genre |
Amundsen-Scott Antarc* Antarctic Antarctica |
genre_facet |
Amundsen-Scott Antarc* Antarctic Antarctica |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00304203 Atmospheric Chemistry and Physics Discussions, 2008, 8 (3), pp.9883-9929 |
op_relation |
hal-00304203 https://hal.science/hal-00304203 https://hal.science/hal-00304203/document https://hal.science/hal-00304203/file/acpd-8-9883-2008.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782329095493779456 |