DOI: 10.1002/2015GL066903
论文题名: The impact of equilibrating hemispheric albedos on tropical performance in the HadGEM2-ES coupled climate model
作者: Haywood J.M. ; Jones A. ; Dunstone N. ; Milton S. ; Vellinga M. ; Bodas-Salcedo A. ; Hawcroft M. ; Kravitz B. ; Cole J. ; Watanabe S. ; Stephens G.
刊名: Geophysical Research Letters
ISSN: 0094-9517
EISSN: 1944-9248
出版年: 2016
卷: 43, 期: 1 起始页码: 395
结束页码: 403
语种: 英语
英文关键词: couple climate models
; HadGEM2-ES
; hemispheric albedo
; hurricane frequency
; tropical precipitation
Scopus关键词: Atmospheric movements
; Atmospheric thermodynamics
; Hurricanes
; Precipitation (meteorology)
; Reflection
; Solar radiation
; Tropics
; Atmospheric moisture
; Coupled climate model
; Hemispheric albedo
; Hurricane frequency
; Monsoon precipitation
; Northern Hemispheres
; Tropical precipitation
; West African Monsoon
; Climate models
; albedo
; climate modeling
; cloud cover
; energy flux
; frequency analysis
; hurricane
; Northern Hemisphere
; precipitation (climatology)
; reflectance
; Southern Hemisphere
; tropical region
; Sahel [Sub-Saharan Africa]
; West Africa
英文摘要: The Earth's hemispheric reflectances are equivalent to within ± 0.2 Wm-2, even though the Northern Hemisphere contains a greater proportion of higher reflectance land areas, because of greater cloud cover in the Southern Hemisphere. This equivalence is unlikely to be by chance, but the reasons are open to debate. Here we show that equilibrating hemispheric albedos in the Hadley Centre Global Environment Model version 2-Earth System coupled climate model significantly improves what have been considered longstanding and apparently intractable model biases. Monsoon precipitation biases over all continental land areas, the penetration of monsoon rainfall across the Sahel, the West African monsoon "jump", and indicators of hurricane frequency are all significantly improved. Mechanistically, equilibrating hemispheric albedos improves the atmospheric cross-equatorial energy transport and increases the supply of tropical atmospheric moisture to the Hadley cell. We conclude that an accurate representation of the cross-equatorial energy transport appears to be critical if tropical performance is to be improved. © 2015. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84957727701&doi=10.1002%2f2015GL066903&partnerID=40&md5=1ae6c96d710ca13597b4a588578aaec5
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10480
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Met Office Hadley Centre, Exeter, United Kingdom
Recommended Citation:
Haywood J.M.,Jones A.,Dunstone N.,et al. The impact of equilibrating hemispheric albedos on tropical performance in the HadGEM2-ES coupled climate model[J]. Geophysical Research Letters,2016-01-01,43(1).