The impact of sea ice melt on the evolution of surface pCO2 in a polar ocean basin
The strong CO2 sink in Arctic Ocean plays a significant role in the global carbon budget. As a high-latitude oceanic ecosystem, the features of sea surface pCO2 and air-sea CO2 flux are significantly influenced by sea ice melt; however, our understanding of pCO2 evolution during sea ice melt remains...
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ftdoajarticles:oai:doaj.org/article:98f7bdb3ffe14490ad3488d94c840083 2024-09-15T17:53:27+00:00 The impact of sea ice melt on the evolution of surface pCO2 in a polar ocean basin Wei Yang Yu Zhao Yingxu Wu Zijie Chen Xiang Gao Hongmei Lin Zhangxian Ouyang Weijun Cai Liqi Chen Di Qi 2024-02-01T00:00:00Z https://doi.org/10.3389/fmars.2024.1307295 https://doaj.org/article/98f7bdb3ffe14490ad3488d94c840083 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2024.1307295/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2024.1307295 https://doaj.org/article/98f7bdb3ffe14490ad3488d94c840083 Frontiers in Marine Science, Vol 11 (2024) Western Arctic Ocean pCO2 dynamics sea ice melt sea ice concentration wind speed Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2024 ftdoajarticles https://doi.org/10.3389/fmars.2024.1307295 2024-08-05T17:50:05Z The strong CO2 sink in Arctic Ocean plays a significant role in the global carbon budget. As a high-latitude oceanic ecosystem, the features of sea surface pCO2 and air-sea CO2 flux are significantly influenced by sea ice melt; however, our understanding of pCO2 evolution during sea ice melt remains limited. In this study, we investigate the dynamics of pCO2 during the progression of sea ice melt in the western Arctic Ocean based on data from two cruises conducted in 2010 and 2012. Our findings reveal substantial spatiotemporal variability in surface pCO2 on the Chukchi Sea shelf and Canada Basin, with a boundary along the shelf breaks at depths of 250-500 m isobaths. On the Chukchi Sea shelf, strong biological consumption dominates pCO2 variability. Moreover, in Canada Basin, the pCO2 dynamics are modulated by various processes. During the active sea ice melt stage before sea ice concentration decreases to 15%, biological production through photosynthetic processes and dilution of ice melt water lead to a reduction in DIC concentration and subsequent decline in pCO2. Further, these effects are counteracted by the air-sea CO2 exchange at the sea surface which tends to increase seawater DIC and subsequently elevate surface pCO2. Compared to the pCO2 reduction resulting from biological production and dilution effects, the contribution of air-sea CO2 exchange is significantly lower. The combined effects of these factors have a significant impact on reducing pCO2 during this stage. Conversely, during the post sea ice melt stage, an increase in pCO2 resulting from high temperatures and air-sea CO2 exchange outweighs its decrease caused by biological production. Their combined effects result in a prevailing increase in sea surface pCO2. We argue that enhanced air-sea CO2 uptake under high wind speeds also contributes to the high sea surface pCO2 observed in 2012, during both active sea ice melt stage and post sea ice melt stage. The present study reports, for the first time, the carbonate dynamics and pCO2 controlling ... Article in Journal/Newspaper Arctic Ocean canada basin Chukchi Chukchi Sea Sea ice Directory of Open Access Journals: DOAJ Articles Frontiers in Marine Science 11 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Western Arctic Ocean pCO2 dynamics sea ice melt sea ice concentration wind speed Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Western Arctic Ocean pCO2 dynamics sea ice melt sea ice concentration wind speed Science Q General. Including nature conservation geographical distribution QH1-199.5 Wei Yang Yu Zhao Yingxu Wu Zijie Chen Xiang Gao Hongmei Lin Zhangxian Ouyang Weijun Cai Liqi Chen Di Qi The impact of sea ice melt on the evolution of surface pCO2 in a polar ocean basin |
topic_facet |
Western Arctic Ocean pCO2 dynamics sea ice melt sea ice concentration wind speed Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
The strong CO2 sink in Arctic Ocean plays a significant role in the global carbon budget. As a high-latitude oceanic ecosystem, the features of sea surface pCO2 and air-sea CO2 flux are significantly influenced by sea ice melt; however, our understanding of pCO2 evolution during sea ice melt remains limited. In this study, we investigate the dynamics of pCO2 during the progression of sea ice melt in the western Arctic Ocean based on data from two cruises conducted in 2010 and 2012. Our findings reveal substantial spatiotemporal variability in surface pCO2 on the Chukchi Sea shelf and Canada Basin, with a boundary along the shelf breaks at depths of 250-500 m isobaths. On the Chukchi Sea shelf, strong biological consumption dominates pCO2 variability. Moreover, in Canada Basin, the pCO2 dynamics are modulated by various processes. During the active sea ice melt stage before sea ice concentration decreases to 15%, biological production through photosynthetic processes and dilution of ice melt water lead to a reduction in DIC concentration and subsequent decline in pCO2. Further, these effects are counteracted by the air-sea CO2 exchange at the sea surface which tends to increase seawater DIC and subsequently elevate surface pCO2. Compared to the pCO2 reduction resulting from biological production and dilution effects, the contribution of air-sea CO2 exchange is significantly lower. The combined effects of these factors have a significant impact on reducing pCO2 during this stage. Conversely, during the post sea ice melt stage, an increase in pCO2 resulting from high temperatures and air-sea CO2 exchange outweighs its decrease caused by biological production. Their combined effects result in a prevailing increase in sea surface pCO2. We argue that enhanced air-sea CO2 uptake under high wind speeds also contributes to the high sea surface pCO2 observed in 2012, during both active sea ice melt stage and post sea ice melt stage. The present study reports, for the first time, the carbonate dynamics and pCO2 controlling ... |
format |
Article in Journal/Newspaper |
author |
Wei Yang Yu Zhao Yingxu Wu Zijie Chen Xiang Gao Hongmei Lin Zhangxian Ouyang Weijun Cai Liqi Chen Di Qi |
author_facet |
Wei Yang Yu Zhao Yingxu Wu Zijie Chen Xiang Gao Hongmei Lin Zhangxian Ouyang Weijun Cai Liqi Chen Di Qi |
author_sort |
Wei Yang |
title |
The impact of sea ice melt on the evolution of surface pCO2 in a polar ocean basin |
title_short |
The impact of sea ice melt on the evolution of surface pCO2 in a polar ocean basin |
title_full |
The impact of sea ice melt on the evolution of surface pCO2 in a polar ocean basin |
title_fullStr |
The impact of sea ice melt on the evolution of surface pCO2 in a polar ocean basin |
title_full_unstemmed |
The impact of sea ice melt on the evolution of surface pCO2 in a polar ocean basin |
title_sort |
impact of sea ice melt on the evolution of surface pco2 in a polar ocean basin |
publisher |
Frontiers Media S.A. |
publishDate |
2024 |
url |
https://doi.org/10.3389/fmars.2024.1307295 https://doaj.org/article/98f7bdb3ffe14490ad3488d94c840083 |
genre |
Arctic Ocean canada basin Chukchi Chukchi Sea Sea ice |
genre_facet |
Arctic Ocean canada basin Chukchi Chukchi Sea Sea ice |
op_source |
Frontiers in Marine Science, Vol 11 (2024) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2024.1307295/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2024.1307295 https://doaj.org/article/98f7bdb3ffe14490ad3488d94c840083 |
op_doi |
https://doi.org/10.3389/fmars.2024.1307295 |
container_title |
Frontiers in Marine Science |
container_volume |
11 |
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1810295562529931264 |