DOI: 10.1002/2015GL063299
论文题名: Heat content variability in the North Atlantic Ocean in ocean reanalyses
作者: Häkkinen S. ; Rhines P.B. ; Worthen D.L.
刊名: Geophysical Research Letters
ISSN: 0094-9603
EISSN: 1944-9334
出版年: 2015
卷: 42, 期: 8 起始页码: 2901
结束页码: 2909
语种: 英语
英文关键词: heat content
Scopus关键词: Enthalpy
; Content variability
; Multidecadal variability
; Neutral density surfaces
; North Atlantic Ocean
; Observational data
; Potential density
; Potential temperature
; Subtropical mode waters
; Oceanography
; convergence
; global ocean
; heat flow
; heat transfer
; volume change
; water mass
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: Warming of the North Atlantic Ocean from the 1950s to 2012 is analyzed on neutral density surfaces and vertical levels in the upper 2000 m. Three reanalyses and two observational data sets are compared. The net gain of 5 × 1022 J in the upper 2000 m is roughly 30% of the global ocean warming over this period. Upper ocean heat content (OHC) is dominated in most regions by heat transport convergence without widespread changes in the potential temperature/salinity relation. The heat convergence is associated with sinking of midthermocline isopycnals, with maximum sinking occurring at potential densities σ0 = 26.4-27.3, which contain subtropical mode waters. Water masses lighter than σ0 = 27.3 accumulate heat by increasing their volume, while heavier waters lose heat by decreasing their volume. Spatially, the OHC trend is nonuniform: the low latitudes, 0-30°N are warming steadily while large multidecadal variability occurs at latitudes 30-65°N. ©2015. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84929512805&doi=10.1002%2f2015GL063299&partnerID=40&md5=70dc4cd61eb5006e689351ee484d43dc
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9218
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: NASA Goddard Space Flight Center, Greenbelt, MD, United States
Recommended Citation:
Häkkinen S.,Rhines P.B.,Worthen D.L.. Heat content variability in the North Atlantic Ocean in ocean reanalyses[J]. Geophysical Research Letters,2015-01-01,42(8).