A modelling assessment from glacial North Pacific deep water to modern intermediate water formation process


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GongXun.Allen [ at ] awi.de

Abstract

North Pacific Intermediate water (NPIW) is a dominant water mass controlling ∼400-1200m depth North Pacific Ocean, meanwhile there is a cessation of North Pacific deep water (NPDW) formation in in modern observations. In contrast, paleoceanographic evidences have recorded NPDW formations during last glacial periods. This sug- gests either a rapid or gradual shutting down process of NPDW formation during the last deglaciation. Here, we use an Earth System Model to diagnose the physical and corresponding biogeochemical evolutions in the North Pacific Ocean before and after the last deglaciation, as well as potential changes during rapid climate shifts of the last deglaciation. Linked to different background climate conditions and varying Atlantic Meridional Over- turning Circulation states, we characterize the modelled NPIW and NPDW changes and builds up linkages to marine records. Our results further develop our understanding about the deglacial switch from NPDW to modern NPIW-only formation process.



Item Type
Conference (Talk)
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Not peer-reviewed
Publication Status
Published
Event Details
European Geosciences Union (EGU) General Assembly, 08 Apr 2018 - 13 Apr 2018, Vienna, Austria.
Eprint ID
47383
Cite as
Gong, X. , Lohmann, G. and Lembke-Jene, L. (2018): A modelling assessment from glacial North Pacific deep water to modern intermediate water formation process , European Geosciences Union (EGU) General Assembly, Vienna, Austria, 8 April 2018 - 13 April 2018 .


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