DOI: 10.1002/joc.5726
论文题名: Upscaling impact of wind/sea surface temperature mesoscale interactions on southern Africa austral summer climate
作者: Desbiolles F. ; Blamey R. ; Illig S. ; James R. ; Barimalala R. ; Renault L. ; Reason C.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 12 起始页码: 4651
结束页码: 4660
语种: 英语
英文关键词: atmospheric circulation
; mesoscale SST forcing
; rainfall variability
; southern Africa summer climate
; upscaling effects of mesoscale air–sea interactions
Scopus关键词: Atmospheric boundary layer
; Atmospheric movements
; Climatology
; Oceanography
; Rain
; Surface properties
; Surface waters
; Tropics
; Atmospheric circulation
; Atmospheric conditions
; Atmospheric simulations
; Mesoscale
; Rainfall variability
; Sea surface temperature (SST)
; Summer climate
; Thermodynamic process
; Atmospheric temperature
; accuracy assessment
; air-sea interaction
; atmospheric circulation
; climate forcing
; climatology
; mesoscale meteorology
; precipitation intensity
; rainfall
; sea surface temperature
; summer
; temperature gradient
; upscaling
; wind field
; Southern Africa
英文摘要: Mesoscale sea surface temperature (SST) variability plays an important role in shaping local atmospheric boundary layers through thermodynamic processes. This study focuses on the upscaling effects of mesoscale SST gradients in sensitive areas on the southern Africa regional atmospheric circulation. Using regional atmospheric model sensitivity experiments which differ only in the mesoscale SST forcing characteristics (either the full spectrum of SST variability or only its large-scale components are included), we first quantify the importance of SST gradients on regional atmospheric conditions. Agulhas eddies and meanders influence the vertical air column up to the troposphere, and mesoscale ocean patterns significantly modify incoming landwards moisture fluxes. The austral summer mean state is then modified in terms of air temperature, cloud cover and mean rainfall, with notable differences in tropical rainbands over southwestern Africa. Mesoscale SST variability favours tropical–extra-tropical interactions and cloudband development over the continent. These results stress the importance of high-resolution ocean forcing for accurate atmospheric simulations. © 2018 The Authors. International Journal of Climatology published by John Wiley & Sons Ltd on behalf of the Royal Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116779
Appears in Collections: 气候减缓与适应
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作者单位: Department of Oceanography, University of Cape Town, Cape Town, South Africa; Laboratoire d'Etudes en Géophysique et Océanographie Spatiale (LEGOS), ICEMASA/CNRS/IRD/UPS/CNES, Toulouse, France; School of Geography and the Environment, University of Oxford, Oxford, United Kingdom; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States
Recommended Citation:
Desbiolles F.,Blamey R.,Illig S.,et al. Upscaling impact of wind/sea surface temperature mesoscale interactions on southern Africa austral summer climate[J]. International Journal of Climatology,2018-01-01,38(12)