DOI: 10.1016/j.gloplacha.2016.10.005
论文题名: The regional patterns of the global dynamic and steric sea level variation in twenty-first century projections
作者: Li J. ; Tan W. ; Chen M. ; Zuo J. ; Yang Y.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2016
卷: 146 起始页码: 133
结束页码: 139
语种: 英语
英文关键词: AMOC
; DSL
; RCP4.5
; Sea level
; SSL
Scopus关键词: Climate models
; DSL
; Ocean currents
; Sea level
; Wind stress
; AMOC
; Atlantic meridional overturning circulations
; Community climate system model
; Halosteric sea level
; North Atlantic Currents
; RCP4.5
; Sea level variations
; Thermosteric sea level
; Oceanography
英文摘要: This study discusses the regional sea-level variation associated with possible influence factors using Community Climate System Model version 4 (CCSM4) in the 21st century. Under the moderate emission scenario of the IPCC's Representative Concentration Pathway 4.5 (RCP4.5), the predicted sea-level variation is spatially non-uniform. The most remarkable variation of the dynamic sea level (DSL) is observed in three typical regions (North Pacific, Southern Ocean, and North Atlantic). In the North Pacific, the DSL rises significantly around Kuroshio and Kuroshio extension, while declines in the subpolar gyre. The DSL variation shows an out-of-phase relationship with the Sverdrup transport, indicating that the wind stress induced Sverdrup transport is generally responsible for the DSL variation. In the Southern Ocean, the DSL variation performs a belt-like pattern, it rises around 40°S zonal band, while declines in its southern side, this is related to the enhancement of westerly wind stress. In the North Atlantic, the DSL variation acts as a dipole mode, it rises in the north of the North Atlantic Current (NAC), and declines in the south. This dipole pattern can be also interpreted by the Sverdrup transport except in the northeast of the NAC, where the DSL rise is more affected by the weakening of the Atlantic Meridional Overturning Circulation (AMOC). Compared with the DSL, the steric sea level (SSL) rises in most of the ocean, and the thermosteric sea level (TSL) is the major contributor. Only in the Southern Ocean, the SSL descends. The decreased SSL is affected by the halosteric sea level (HSL), which is mainly attributed to the weakly increased salinity from 300 m to the bottom. To some extent, the HSL also contributes to the SSL rise in the Pacific, this is caused by the seawater freshening and warming in the upper 1500 m. However, in the Atlantic, the HSL declines, thus partly offsets the rising effect of the TSL. These opposite variations are associated with the weakened AMOC. © 2016 URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84992053149&doi=10.1016%2fj.gloplacha.2016.10.005&partnerID=40&md5=f54e74ec3d5ce22a6a9dfc9c816b631c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11601
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
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作者单位: South China Sea Marine Prediction Center, State Oceanic Administration, Guangzhou, China
Recommended Citation:
Li J.,Tan W.,Chen M.,et al. The regional patterns of the global dynamic and steric sea level variation in twenty-first century projections[J]. Global and Planetary Change,2016-01-01,146.