DOI: 10.1175/JCLI-D-15-0015.1
Scopus记录号: 2-s2.0-84957801104
论文题名: Estimates of air-sea feedbacks on sea surface temperature anomalies in the Southern Ocean
作者: Hausmann U. ; Czaja A. ; Marshall J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 2 起始页码: 439
结束页码: 454
语种: 英语
Scopus关键词: Air entrainment
; Atmospheric temperature
; Atmospheric thermodynamics
; Climate change
; Coastal zones
; Damping
; Feedback
; Heat flux
; Sea ice
; Submarine geophysics
; Surface properties
; Surface waters
; Atmosphere-ocean interactions
; Climate variability
; Geographic location
; Sea surface temperature (SST)
; Southern ocean
; Variability
; Oceanography
; air-sea interaction
; climate variation
; entrainment
; heat flux
; polar front
; sea surface temperature
; temperature anomaly
; Antarctica
; Southern Ocean
英文摘要: Sea surface temperature (SST) air-sea feedback strengths and associated decay time scales in the Southern Ocean (SO) are estimated from observations and reanalysis datasets of SST, air-sea heat fluxes, and ocean mixed layer depths. The spatial, seasonal, and scale dependence of the air-sea heat flux feedbacks is mapped in circumpolar bands and implications for SST persistence times are explored. It is found that the damping effect of turbulent heat fluxes dominates over that due to radiative heat fluxes. The turbulent heat flux feedback acts to damp SSTs in all bands and spatial scales and in all seasons, at rates varying between 5 and 25Wm-2K-1, while the radiative heat flux feedback has a more uniform spatial distribution with a magnitude rarely exceeding 5Wm-2K-1. In particular, the implied net air-sea feedback (turbulent1radiative) on SST south of the polar front, and in the region of seasonal sea ice, is as weak as 5-10Wm-2K-1 in the summertime on large spatial scales. Air-sea interaction alone thus allows SST signals induced around Antarctica in the summertime to persist for several seasons. The damping effect of mixed layer entrainment on SST anomalies averages to approximately 20Wm-2K-1 across the ACC bands in the summer-to-winter entraining season and thereby reduces summertime SST persistence to less than half of that predicted by air- sea interaction alone (i.e., 3-6 months). © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50081
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; Department of Physics, Imperial College London, London, United Kingdom
Recommended Citation:
Hausmann U.,Czaja A.,Marshall J.. Estimates of air-sea feedbacks on sea surface temperature anomalies in the Southern Ocean[J]. Journal of Climate,2016-01-01,29(2)