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DOI | 10.1007/s00382-015-2780-1 |
Enhancement of the southward return flow of the Atlantic Meridional Overturning Circulation by data assimilation and its influence in an assimilative ocean simulation forced by CORE-II atmospheric forcing | |
Fujii, Yosuke; Tsujino, Hiroyuki; Toyoda, Takahiro; Nakano, Hideyuki | |
2017-08-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 49期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | This paper examines the difference in the Atlantic Meridional Overturning Circulation (AMOC) mean state between free and assimilative simulations of a common ocean model using a common interannual atmospheric forcing. In the assimilative simulation, the reproduction of cold cores in the Nordic Seas, which is absent in the free simulation, enhances the overflow to the North Atlantic and improves AMOC with enhanced transport of the deeper part of the southward return flow. This improvement also induces an enhanced supply of North Atlantic Deep Water (NADW) and causes better representation of the Atlantic deep layer despite the fact that correction by the data assimilation is applied only to temperature and salinity above a depth of 1750 m. It also affects Circumpolar Deep Water in the Southern Ocean. Although the earliest influence of the improvement propagated by coastal waves reaches the Southern Ocean in 10-15 years, substantial influence associated with the arrival of the renewed NADW propagates across the Atlantic Basin in several decades. Although the result demonstrates that data assimilation is able to improve the deep ocean state even if there is no data there, it also indicates that long-term integration is required to reproduce variability in the deep ocean originating from variations in the upper ocean. This study thus provides insights on the reliability of AMOC and the ocean state in the Atlantic deep layer reproduced by data assimilation systems. |
英文关键词 | Atlantic Meridional Overturning Circulation (AMOC) Ocean Reanalyses Intercomparison Project (ORA-IP) Coordinated Ocean-ice Reference Experiment II (CORE-II) Data assimilation Ocean general circulation model |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000407244700009 |
WOS关键词 | DENMARK STRAIT OVERFLOW ; FAROE BANK CHANNEL ; NORTH-ATLANTIC ; ABYSSAL OCEAN ; NORDIC SEAS ; MODELS ; TEMPERATURE ; ADVECTION ; PARAMETERIZATION ; VARIABILITY |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35299 |
专题 | 气候变化 |
作者单位 | Japan Meteorol Agcy, Meteorol Res Inst, Oceanog & Geochem Res Dept, 1-1 Nagamine, Tsukuba, Ibaraki 3050052, Japan |
推荐引用方式 GB/T 7714 | Fujii, Yosuke,Tsujino, Hiroyuki,Toyoda, Takahiro,et al. Enhancement of the southward return flow of the Atlantic Meridional Overturning Circulation by data assimilation and its influence in an assimilative ocean simulation forced by CORE-II atmospheric forcing[J]. CLIMATE DYNAMICS,2017,49(3). |
APA | Fujii, Yosuke,Tsujino, Hiroyuki,Toyoda, Takahiro,&Nakano, Hideyuki.(2017).Enhancement of the southward return flow of the Atlantic Meridional Overturning Circulation by data assimilation and its influence in an assimilative ocean simulation forced by CORE-II atmospheric forcing.CLIMATE DYNAMICS,49(3). |
MLA | Fujii, Yosuke,et al."Enhancement of the southward return flow of the Atlantic Meridional Overturning Circulation by data assimilation and its influence in an assimilative ocean simulation forced by CORE-II atmospheric forcing".CLIMATE DYNAMICS 49.3(2017). |
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