气候变化领域集成服务门户(CCPortal): Subpolar marginal seas fuel the North Pacific through the intermediate water at the termination of the global ocean circulation

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DOI	10.1073/pnas.2000658117
	Subpolar marginal seas fuel the North Pacific through the intermediate water at the termination of the global ocean circulation
	Nishioka J.; Obata H.; Ogawa H.; Ono K.; Yamashita Y.; Lee K.; Takeda S.; Yasuda I.
发表日期	2020
ISSN	0027-8424
起始页码	12665
结束页码	12673
卷号	117 期号:23
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.
英文关键词	Dissolved iron; GEOTRACES; Island chains mixing; Macronutrients; North Pacific Ocean
语种	英语
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
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160931
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
推荐引用方式 GB/T 7714	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],2020,117(23).
APA	Nishioka J..,Obata H..,Ogawa H..,Ono K..,Yamashita Y..,...&Yasuda I..(2020).Subpolar marginal seas fuel the North Pacific through the intermediate water at the termination of the global ocean circulation.Proceedings of the National Academy of Sciences of the United States of America,117(23).
MLA	Nishioka J.,et al."Subpolar marginal seas fuel the North Pacific through the intermediate water at the termination of the global ocean circulation".Proceedings of the National Academy of Sciences of the United States of America 117.23(2020).