| DOI: | 10.5194/cp-8-535-2012
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| Scopus记录号: | 2-s2.0-84858786303
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| 论文题名: | A critical humidity threshold for monsoon transitions |
| 作者: | Schewe J.; Levermann A.; Cheng H.
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| 刊名: | Climate of the Past
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| ISSN: | 18149324
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| 出版年: | 2012
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| 卷: | 8, 期:2 | | 起始页码: | 535
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| 结束页码: | 544
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| 语种: | 英语
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| Scopus关键词: | advection
; climate change
; climate feedback
; conceptual framework
; evaporation
; humidity
; marine atmosphere
; moisture
; monsoon
; numerical model
; proxy climate record
; rainfall
; sea surface temperature
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| 英文摘要: | Monsoon systems around the world are governed by the so-called moisture-advection feedback. Here we show that, in a minimal conceptual model, this feedback implies a critical threshold with respect to the atmospheric specific humidity q c o over the ocean adjacent to the monsoon region. If q c o falls short of this critical value q c oc, monsoon rainfall over land cannot be sustained. Such a case could occur if evaporation from the ocean was reduced, e.g. due to low sea surface temperatures. Within the restrictions of the conceptual model, we estimate q c oc from present-day reanalysis data for four major monsoon systems, and demonstrate how this concept can help understand abrupt variations in monsoon strength on orbital timescales as found in proxy records. © Author(s) 2012. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/49617
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| Appears in Collections: | 气候变化与战略
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| Recommended Citation: | |
Schewe J.,Levermann A.,Cheng H.. A critical humidity threshold for monsoon transitions[J]. Climate of the Past,2012-01-01,8(2)
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