Secular trends and seasonal variations of partial pressure of carbon dioxide in the surface sea water in the Australian secutor of the Southern Ocean
In order to elucidate the secular trends of oceanic CO_2 uptake in the Indian sector of the Southern Ocean, pCO_2, the partial pressure of CO_2 in the ocean surface layer, has been measured since 1987 on board the icebreaker Shirase. Meridional distributions of pCO_2 along 110゜E in early December cl...
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National Institute of Polar Research
2010
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fttriple:oai:gotriple.eu:oai:doaj.org/article:579c3e5e33ba4949883bceefb2672fc5 2023-05-15T13:41:05+02:00 Secular trends and seasonal variations of partial pressure of carbon dioxide in the surface sea water in the Australian secutor of the Southern Ocean Gen Hashida Shin-ichiro Nakaoka Hisashi Ono Takakiyo Nakazawa Hisayuki Yoshikawa Shuji Aoki Shinji Morimoto Takashi Yamanouchi Tsuneo Odate Mitsuo Fukuchi 2010-12-01 https://doi.org/10.15094/00009566 https://doaj.org/article/579c3e5e33ba4949883bceefb2672fc5 en other eng National Institute of Polar Research doi:10.15094/00009566 0085-7289 2432-079X https://doaj.org/article/579c3e5e33ba4949883bceefb2672fc5 undefined Antarctic Record, Vol 54, Iss special issue, Pp 438-448 (2010) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2010 fttriple https://doi.org/10.15094/00009566 2023-01-22T19:14:29Z In order to elucidate the secular trends of oceanic CO_2 uptake in the Indian sector of the Southern Ocean, pCO_2, the partial pressure of CO_2 in the ocean surface layer, has been measured since 1987 on board the icebreaker Shirase. Meridional distributions of pCO_2 along 110゜E in early December clearly show steep changes at such fronts as the subtropical front, subantarctic front, and polar front. Although pCO_2 of each zone shows interannual variation, secular trend is detectable. For example, the estimated rate of increase of pCO_2 in the permanent open ocean zone between the polar front (around 53゜S) and the northern edge of winter ice cover (63゜S) is about 1.3 μatm y, which is slightly lower than the rate of increase of the atmospheric CO_2 concentration. From the results obtained by multi-ship observations with 4 research vessels in the Southern Ocean in summer, we found that the values of pCO_2 off the coast of the Antarctic Continent (66゜S) varied temporally by 100 μatm for 5 months. We also found that nDIC decreased with time from December 2001 to March 2002 in the upper layer from 100 to 200 m due to biological activity during summer. Article in Journal/Newspaper Antarc* Antarctic Icebreaker Southern Ocean Unknown Antarctic Indian Southern Ocean The Antarctic |
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geo envir Gen Hashida Shin-ichiro Nakaoka Hisashi Ono Takakiyo Nakazawa Hisayuki Yoshikawa Shuji Aoki Shinji Morimoto Takashi Yamanouchi Tsuneo Odate Mitsuo Fukuchi Secular trends and seasonal variations of partial pressure of carbon dioxide in the surface sea water in the Australian secutor of the Southern Ocean |
topic_facet |
geo envir |
description |
In order to elucidate the secular trends of oceanic CO_2 uptake in the Indian sector of the Southern Ocean, pCO_2, the partial pressure of CO_2 in the ocean surface layer, has been measured since 1987 on board the icebreaker Shirase. Meridional distributions of pCO_2 along 110゜E in early December clearly show steep changes at such fronts as the subtropical front, subantarctic front, and polar front. Although pCO_2 of each zone shows interannual variation, secular trend is detectable. For example, the estimated rate of increase of pCO_2 in the permanent open ocean zone between the polar front (around 53゜S) and the northern edge of winter ice cover (63゜S) is about 1.3 μatm y, which is slightly lower than the rate of increase of the atmospheric CO_2 concentration. From the results obtained by multi-ship observations with 4 research vessels in the Southern Ocean in summer, we found that the values of pCO_2 off the coast of the Antarctic Continent (66゜S) varied temporally by 100 μatm for 5 months. We also found that nDIC decreased with time from December 2001 to March 2002 in the upper layer from 100 to 200 m due to biological activity during summer. |
format |
Article in Journal/Newspaper |
author |
Gen Hashida Shin-ichiro Nakaoka Hisashi Ono Takakiyo Nakazawa Hisayuki Yoshikawa Shuji Aoki Shinji Morimoto Takashi Yamanouchi Tsuneo Odate Mitsuo Fukuchi |
author_facet |
Gen Hashida Shin-ichiro Nakaoka Hisashi Ono Takakiyo Nakazawa Hisayuki Yoshikawa Shuji Aoki Shinji Morimoto Takashi Yamanouchi Tsuneo Odate Mitsuo Fukuchi |
author_sort |
Gen Hashida |
title |
Secular trends and seasonal variations of partial pressure of carbon dioxide in the surface sea water in the Australian secutor of the Southern Ocean |
title_short |
Secular trends and seasonal variations of partial pressure of carbon dioxide in the surface sea water in the Australian secutor of the Southern Ocean |
title_full |
Secular trends and seasonal variations of partial pressure of carbon dioxide in the surface sea water in the Australian secutor of the Southern Ocean |
title_fullStr |
Secular trends and seasonal variations of partial pressure of carbon dioxide in the surface sea water in the Australian secutor of the Southern Ocean |
title_full_unstemmed |
Secular trends and seasonal variations of partial pressure of carbon dioxide in the surface sea water in the Australian secutor of the Southern Ocean |
title_sort |
secular trends and seasonal variations of partial pressure of carbon dioxide in the surface sea water in the australian secutor of the southern ocean |
publisher |
National Institute of Polar Research |
publishDate |
2010 |
url |
https://doi.org/10.15094/00009566 https://doaj.org/article/579c3e5e33ba4949883bceefb2672fc5 |
geographic |
Antarctic Indian Southern Ocean The Antarctic |
geographic_facet |
Antarctic Indian Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Icebreaker Southern Ocean |
genre_facet |
Antarc* Antarctic Icebreaker Southern Ocean |
op_source |
Antarctic Record, Vol 54, Iss special issue, Pp 438-448 (2010) |
op_relation |
doi:10.15094/00009566 0085-7289 2432-079X https://doaj.org/article/579c3e5e33ba4949883bceefb2672fc5 |
op_rights |
undefined |
op_doi |
https://doi.org/10.15094/00009566 |
_version_ |
1766145558339125248 |