Storage and redistribution of anthropogenic CO2 in the western North Pacific:The role of subtropical mode water transportation

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外文摘要：Oceanic uptake and storage of anthropogenic CO2(CANT)are regulated by ocean circulation and ventilation.To decipher the storage and redistribution of CANT in the western North Pacific,where a major CANT sink develops,we investigated the water column carbonate system,dissolved inorganic radiocarbon and ancillary parameters in May and August 2018,spanning the Kuroshio Extension(KE,35-39 °N),Kuroshio Recirculation(KR,27-35 °N)and subtropical(21-27 °N)zones.Water column CANT inventories were estimated to be 40.5±1.1 mol m-2 in the KR zone and 37.2±0.9 mol m-2 in the subtropical zone.In comparison with historical data obtained in 2005,relatively high rates of increase of the CANT inventory of 1.05±0.20 and 1.03±0.12 mol m-2 yr-1 in the recent decade were obtained in the KR and subtropical zones,respectively.Our water-mass-based analyses suggest that formation and transport of subtropical mode water dominate the deep penetration,storage,and redistribution of CANT in those two regions.In the KE zone,however,both the water column CANT inventory and the decadal CANT accumulation rate were small and uncertain owing to the dynamic hydrology,where the naturally uplifting isopycnal surfaces make CANT penetration relatively shallow.The findings of this study improve the understanding of the spatiotemporal variations of CANT distribution,storage,and transport in the western North Pacific.

外文关键词：

Oceanic CO2 uptakeAnthropogenic CO2 storageSubtropical mode waterKuroshio extensionKuroshio recirculationWestern North Pacific

作者：

Cheng-long Li、Lei Han、Wei-dong Zhai、Di Qi、Xu-chen Wang、Hong-mei Lin、Li-wen Zheng

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作者单位：

Institute of Marine Science and Technology,Shandong University,Qingdao 266237,China

China-ASEAN College of Marine Science and Technology,Xiamen University Malaysia,Selangor,Malaysia

Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519080,China

Polar and Marine Research Institute,Jimei University,Xiamen 361021,China

Key Laboratory of Marine Chemistry Theory and Technology,and Frontiers Science Center for Deep Ocean Multispheres and Earth System,Ministry of Education,Ocean University of China,Qingdao 266100,China

Center for Isotope Geochemistry and Geochronology,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China

Weihai Institute of Marine Ecology and Economy Research,Weihai 264400,China

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基金：

国家自然科学基金国家自然科学基金Laboratory of Marine Isotopic Technology and Environmental Risk Assessment,Third Institute of Oceanography,Ministry of NaturSurvey Project of Environmental Radioactivity Detection in the Western PacificSurvey Project of Environmental Radioactivity Detection in the Western Pacific

项目编号：

4214100191858210R/V Xiangyanghong 3R/V Tan Kah Kee

出版年：

2024

DOI：

10.1016/j.fmre.2022.05.001

自然科学基础研究(英文)

CSTPCD

ISSN：

年,卷(期)：2024.(1)

参考文献量67