DOI: 10.1175/JCLI-D-14-00495.1
Scopus记录号: 2-s2.0-84944073510
论文题名: The influence of cloud feedbacks on equatorial atlantic variability
作者: Bellomo K. ; Clement A.C. ; Mauritsen T. ; Rädel G. ; Stevens B.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 7 起始页码: 2725
结束页码: 2744
语种: 英语
Scopus关键词: Atmospheric temperature
; Climate change
; Climatology
; Clouds
; Earth atmosphere
; Feedback
; Fluxes
; Nickel
; Surface waters
; Atmospheric fields
; Atmospheric general circulation models
; Climate variability
; Cloud forcing
; Equatorial climate
; Interannual variability
; Multidecadal variability
; Sea surface temperature anomalies
; Oceanography
; annual variation
; atmospheric general circulation model
; climate feedback
; climate forcing
; climate variation
; cloud cover
; cloud microphysics
; decadal variation
; sea surface temperature
; stratocumulus
; temperature anomaly
; Atlantic Ocean
; Atlantic Ocean (Equatorial)
; Namibia
英文摘要: Observations show that cloud feedback over the Namibian stratocumulus region is positive because cloud cover is anticorrelated with local sea surface temperature (SST) anomalies. Moreover, regressions of observed atmospheric fields on equatorial Atlantic SST anomalies indicate that cloud feedbacks over the Namibian stratocumulus region covary with Atlantic Niño. However, from observations alone, it is not possible to quantify the influence of regional cloud feedbacks on equatorial climate variability. To address this question, a set of sensitivity experiments are conducted using an atmospheric general circulation model (ECHAM6) coupled to a slab ocean in which the strength of positive cloud feedback is enhanced over several regions in the South Atlantic basin. Enhanced positive cloud feedback over the Namibian stratocumulus region increases local as well as equatorial SST variability, whereas enhanced cloud feedback over other regions in the South Atlantic increases local SST variability but exhibits negligible responses at the equator. The authors' results indicate that the Namibian region plays a central role in enhancing equatorial SST variability because it is located where the SST anomalies associated with the simulated Atlantic Niño in the slab-ocean model develop. These results highlight the important role of the regional coupling of cloud cover over the Namibian region with local SSTs and its effects on equatorial Atlantic climate variability. © 2015 American Meteorological Society. 资助项目: NSF, Bundesministerium für Bildung und Frauen
; BMBF, Bundesministerium für Bildung und Frauen
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50582
Appears in Collections: 气候变化事实与影响
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作者单位: Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States; Max Planck Institute for Meteorology, Hamburg, Germany
Recommended Citation:
Bellomo K.,Clement A.C.,Mauritsen T.,et al. The influence of cloud feedbacks on equatorial atlantic variability[J]. Journal of Climate,2015-01-01,28(7)