DOI: 10.1175/JCLI-D-11-00148.1
Scopus记录号: 2-s2.0-84867677428
论文题名: On the observed trends and changes in global sea surface temperature and air-sea heat fluxes (1984-2006)
作者: Large W.G. ; Yeager S.G.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 18 起始页码: 6123
结束页码: 6135
语种: 英语
Scopus关键词: Air sea interactions
; Decadal variability
; Oceanic variability
; Surface flux
; Trends
; Atmospheric temperature
; Climate change
; Feedback
; Oceanography
; Heat flux
; air-sea interaction
; atmosphere-ocean coupling
; decadal variation
; global change
; heat flux
; observational method
; ocean basin
; satellite imagery
; sea surface temperature
; timescale
; trend analysis
英文摘要: Global satellite observations show the sea surface temperature (SST) increasing since the 1970s in all ocean basins, while the net air-sea heat fluxQdecreases. Over the period 1984-2006 the global changes are 0.288C in SST and 29.1 W m -2 in Q, giving an effective air-sea coupling coefficient of 232 W m -2 8C -1. The global response in Q expected from SST alone is determined to be 212.9 W m -2, and the global distribution of the associated coupling coefficient is shown. Typically, about one-half (6.8 W m -2) of this SST effect on heat flux is compensated by changes in the overlying near-surface atmosphere. Slab Ocean Models (SOMs) assume that ocean heating processes do not change from year to year so that a constant annual heat flux would maintain a linear trend in annual SST. However, the necessary 6.1 W m -2 increase is not found in the downwelling longwave and shortwave fluxes, which combined show a 23 W m -2 decrease. The SOM assumptions are revisited to determine the most likely source of the inconsistency with observations of (212.91 6.8 2 3) 5 29.1 W m -2. The indirect inference is that diminished ocean cooling due to vertical ocean processes played an important role in sustaining the observed positive trend in global SST from 1984 through 2006, despite the decrease in global surface heat flux. A similar situation is found in the individual basins, though magnitudes differ. A conclusion is that natural variability, rather than long-term climate change, dominates the SST and heat flux changes over this 23-yr period. On shorter time scales the relationship between SST and heat flux exhibits a variety of behaviors. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52267
Appears in Collections: 气候变化事实与影响
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作者单位: National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Large W.G.,Yeager S.G.. On the observed trends and changes in global sea surface temperature and air-sea heat fluxes (1984-2006)[J]. Journal of Climate,2012-01-01,25(18)