Maritime aerosol optical thickness measured during Antarctic research cruises of R/V Umitaka-Maru
Aerosol optical thickness (AOT) was measured during Antarctic research cruises of R V Umitaka-Maru. The measured AOTs at 500 nm in the Indian sector of the Antarctic Ocean ranged from 0.02 to 0.12. In Antarctic coastal waters, the AOTs were as low as around 0.05. On the other hand, the some AOTs wer...
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National Institute of Polar Research
2010
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fttriple:oai:gotriple.eu:oai:doaj.org/article:c44a1e2fdb72469cb8b60d69bb5bab8b 2023-05-15T14:04:32+02:00 Maritime aerosol optical thickness measured during Antarctic research cruises of R/V Umitaka-Maru Hiroshi Kobayashi Toru Hirawake Masanori Yabuki Sayako Ueda Kazuo Osada Masataka Shiobara Mitsuo Fukuchi 2010-12-01 https://doi.org/10.15094/00009568 https://doaj.org/article/c44a1e2fdb72469cb8b60d69bb5bab8b en other eng National Institute of Polar Research doi:10.15094/00009568 0085-7289 2432-079X https://doaj.org/article/c44a1e2fdb72469cb8b60d69bb5bab8b undefined Antarctic Record, Vol 54, Iss special issue, Pp 465-473 (2010) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2010 fttriple https://doi.org/10.15094/00009568 2023-01-22T18:59:55Z Aerosol optical thickness (AOT) was measured during Antarctic research cruises of R V Umitaka-Maru. The measured AOTs at 500 nm in the Indian sector of the Antarctic Ocean ranged from 0.02 to 0.12. In Antarctic coastal waters, the AOTs were as low as around 0.05. On the other hand, the some AOTs were higher than 0.1 from 40゜S to 60゜S. In middle and low latitude regions of the Indian Ocean, the AOTs ranged from 0.05 to 0.15. The AOTs were correlated with wind speed. It is indicated that sea-salt particles, generated by wind, dominated optically and wind speed affected the AOT in the Antarctic Ocean. Angstro¨m exponent decreased with increasing AOT. In the AOT wavelength spectra, some AOTs in 380 nm and 870 nm tended to deviate from the power function. Comparing calculation methods of Rayleigh optical thickness suggested a possibility of reducing the deviations of these AOTs. In the future, accuracy check of the instrument constant and review of the calculation method of Rayleigh optical thickness are recommended to enhance the accuracy of maritime AOT measurement. Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean Unknown Antarctic Antarctic Ocean Indian The Antarctic |
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language |
English |
topic |
geo envir |
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geo envir Hiroshi Kobayashi Toru Hirawake Masanori Yabuki Sayako Ueda Kazuo Osada Masataka Shiobara Mitsuo Fukuchi Maritime aerosol optical thickness measured during Antarctic research cruises of R/V Umitaka-Maru |
topic_facet |
geo envir |
description |
Aerosol optical thickness (AOT) was measured during Antarctic research cruises of R V Umitaka-Maru. The measured AOTs at 500 nm in the Indian sector of the Antarctic Ocean ranged from 0.02 to 0.12. In Antarctic coastal waters, the AOTs were as low as around 0.05. On the other hand, the some AOTs were higher than 0.1 from 40゜S to 60゜S. In middle and low latitude regions of the Indian Ocean, the AOTs ranged from 0.05 to 0.15. The AOTs were correlated with wind speed. It is indicated that sea-salt particles, generated by wind, dominated optically and wind speed affected the AOT in the Antarctic Ocean. Angstro¨m exponent decreased with increasing AOT. In the AOT wavelength spectra, some AOTs in 380 nm and 870 nm tended to deviate from the power function. Comparing calculation methods of Rayleigh optical thickness suggested a possibility of reducing the deviations of these AOTs. In the future, accuracy check of the instrument constant and review of the calculation method of Rayleigh optical thickness are recommended to enhance the accuracy of maritime AOT measurement. |
format |
Article in Journal/Newspaper |
author |
Hiroshi Kobayashi Toru Hirawake Masanori Yabuki Sayako Ueda Kazuo Osada Masataka Shiobara Mitsuo Fukuchi |
author_facet |
Hiroshi Kobayashi Toru Hirawake Masanori Yabuki Sayako Ueda Kazuo Osada Masataka Shiobara Mitsuo Fukuchi |
author_sort |
Hiroshi Kobayashi |
title |
Maritime aerosol optical thickness measured during Antarctic research cruises of R/V Umitaka-Maru |
title_short |
Maritime aerosol optical thickness measured during Antarctic research cruises of R/V Umitaka-Maru |
title_full |
Maritime aerosol optical thickness measured during Antarctic research cruises of R/V Umitaka-Maru |
title_fullStr |
Maritime aerosol optical thickness measured during Antarctic research cruises of R/V Umitaka-Maru |
title_full_unstemmed |
Maritime aerosol optical thickness measured during Antarctic research cruises of R/V Umitaka-Maru |
title_sort |
maritime aerosol optical thickness measured during antarctic research cruises of r/v umitaka-maru |
publisher |
National Institute of Polar Research |
publishDate |
2010 |
url |
https://doi.org/10.15094/00009568 https://doaj.org/article/c44a1e2fdb72469cb8b60d69bb5bab8b |
geographic |
Antarctic Antarctic Ocean Indian The Antarctic |
geographic_facet |
Antarctic Antarctic Ocean Indian The Antarctic |
genre |
Antarc* Antarctic Antarctic Ocean |
genre_facet |
Antarc* Antarctic Antarctic Ocean |
op_source |
Antarctic Record, Vol 54, Iss special issue, Pp 465-473 (2010) |
op_relation |
doi:10.15094/00009568 0085-7289 2432-079X https://doaj.org/article/c44a1e2fdb72469cb8b60d69bb5bab8b |
op_rights |
undefined |
op_doi |
https://doi.org/10.15094/00009568 |
_version_ |
1766275699588464640 |