DOI: 10.1007/s00382-017-3651-8
Scopus记录号: 2-s2.0-85016474214
论文题名: Coupling between marine boundary layer clouds and summer-to-summer sea surface temperature variability over the North Atlantic and Pacific
作者: Myers T.A. ; Mechoso C.R. ; DeFlorio M.J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-03-04 起始页码: 955
结束页码: 969
语种: 英语
英文关键词: Climate models
; Climate variability
; Clouds
; Marine boundary layer
; Sea surface temperature
Scopus关键词: annual variation
; boundary layer
; climate modeling
; cloud cover
; cloud microphysics
; cloud radiative forcing
; computer simulation
; decadal variation
; numerical model
; sea surface temperature
; shortwave radiation
; summer
; Atlantic Ocean
; Pacific Ocean
英文摘要: Climate modes of variability over the Atlantic and Pacific may be amplified by a positive feedback between sea-surface temperature (SST) and marine boundary layer clouds. However, it is well known that climate models poorly simulate this feedback. Does this deficiency contribute to model-to-model differences in the representation of climate modes of variability? Over both the North Atlantic and Pacific, typical summertime interannual to interdecadal SST variability exhibits horseshoe-like patterns of co-located anomalies of shortwave cloud radiative effect (CRE), low-level cloud fraction, SST, and estimated inversion strength over the subtropics and midlatitudes that are consistent with a positive cloud feedback. During winter over the midlatitudes, this feedback appears to be diminished. Models participating in the Coupled Model Intercomparison Project phase 5 that simulate a weak feedback between subtropical SST and shortwave CRE produce smaller and less realistic amplitudes of summertime SST and CRE variability over the northern oceans compared to models with a stronger feedback. The change in SST amplitude per unit change in CRE amplitude among the models and observations may be understood as the temperature response of the ocean mixed layer to a unit change in radiative flux over the course of a season. These results highlight the importance of boundary layer clouds in interannual to interdecadal atmosphere–ocean variability over the northern oceans during summer. The results also suggest that deficiencies in the simulation of these clouds in coupled climate models contribute to underestimation in their simulation of summer-to-summer SST variability. © 2017, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109478
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Atmospheric and Oceanic Sciences, University of California, 520 Portola Plaza, 7127 Math Sciences Building, Los Angeles, CA 90095, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
Recommended Citation:
Myers T.A.,Mechoso C.R.,DeFlorio M.J.. Coupling between marine boundary layer clouds and summer-to-summer sea surface temperature variability over the North Atlantic and Pacific[J]. Climate Dynamics,2018-01-01,50(2018-03-04)