globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2000658117
论文题名:
Subpolar marginal seas fuel the North Pacific through the intermediate water at the termination of the global ocean circulation
作者: Nishioka J.; Obata H.; Ogawa H.; Ono K.; Yamashita Y.; Lee K.; Takeda S.; Yasuda I.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:23
起始页码: 12665
结束页码: 12673
语种: 英语
英文关键词: Dissolved iron ; GEOTRACES ; Island chains mixing ; Macronutrients ; North Pacific Ocean
Scopus关键词: iron ; Article ; Bering Sea ; carbon cycle ; microbial degradation ; nutrient dynamics ; ocean current ; Pacific Ocean ; priority journal ; Sea of Okhotsk ; sea surface waters ; thermocline ; turbulent flow
英文摘要: The mechanism by which nutrients in the deep ocean are uplifted to maintain nutrient-rich surface waters in the subarctic Pacific has not been properly described. The iron (Fe) supply processes that control biological production in the nutrient-rich waters are also still under debate. Here, we report the processes that determine the chemical properties of intermediate water and the uplift of Fe and nutrients to the main thermocline, which eventually maintains surface biological productivity. Extremely nutrient-rich water is pooled in intermediate water (26.8 to 27.6 σθ) in the western subarctic area, especially in the Bering Sea basin. Increases of two to four orders in the upward turbulent fluxes of nutrients were observed around the marginal sea island chains, indicating that nutrients are uplifted to the surface and are returned to the subarctic intermediate nutrient pool as sinking particles through the biological production and microbial degradation of organic substances. This nutrient circulation coupled with the dissolved Fe in upper-intermediate water (26.6 to 27.0 σθ) derived from the Okhotsk Sea evidently constructs an area that has one of the largest biological CO2 drawdowns in the world ocean. These results highlight the pivotal roles of the marginal seas and the formation of intermediate water at the end of the ocean conveyor belt. © 2020 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164182
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作者单位: Nishioka, J., Pan-Okhotsk Research Center, Institute of Low Temperature Science, Hokkaido University, Sapporo, 060-0819, Japan, Arctic Research Center, Hokkaido University, Sapporo, 001-0021, Japan; Obata, H., Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, 277-8564, Japan; Ogawa, H., Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, 277-8564, Japan; Ono, K., Pan-Okhotsk Research Center, Institute of Low Temperature Science, Hokkaido University, Sapporo, 060-0819, Japan; Yamashita, Y., Faculty of Environmental Earth Science, Hokkaido University, Sapporo, 060-0810, Japan; Lee, K., Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, 277-8564, Japan; Takeda, S., Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, 852-8521, Japan; Yasuda, I., Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, 277-8564, Japan

Recommended Citation:
Nishioka J.,Obata H.,Ogawa H.,et al. Subpolar marginal seas fuel the North Pacific through the intermediate water at the termination of the global ocean circulation[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(23)
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