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DOI | 10.1088/1748-9326/aac178 |
Feedback mechanisms of shallow convective clouds in a warmer climate as demonstrated by changes in buoyancy | |
Dagan, G.1; Koren, I.1; Altaratz, O.1; Feingold, G.2 | |
2018-05-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS
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ISSN | 1748-9326 |
出版年 | 2018 |
卷号 | 13期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | Israel; USA |
英文摘要 | Cloud feedbacks could influence significantly the overall response of the climate system to global warming. Here we study the response of warm convective clouds to a uniform temperature change under constant relative humidity (RH) conditions. We show that an increase in temperature drives competing effects at the cloud scale: a reduction in the thermal buoyancy term and an increase in the humidity buoyancy term. Both effects are driven by the increased contrast in the water vapor content between the cloud and its environment, under warming with constant RH. The increase in the moisture content contrast between the cloud and its environment enhances the evaporation at the cloud margins, increases the entrainment, and acts to cool the cloud. Hence, there is a reduction in the thermal buoyancy term, despite the fact that theoretically this term should increase. |
英文关键词 | cloud feedback shallow convection buoyancy |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000432438700002 |
WOS关键词 | WATER-VAPOR ; CUMULUS CLOUDS ; MODEL ; CYCLE ; TEMPERATURE ; ENTRAINMENT ; SENSITIVITY ; SIMULATION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/15073 |
专题 | 气候变化 |
作者单位 | 1.Weizmann Inst Sci, Dept Earth & Planetary Sci, IL-76100 Rehovot, Israel; 2.NOAA, Earth Syst Res Lab, Chem Sci Div, Boulder, CO USA |
推荐引用方式 GB/T 7714 | Dagan, G.,Koren, I.,Altaratz, O.,et al. Feedback mechanisms of shallow convective clouds in a warmer climate as demonstrated by changes in buoyancy[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(5). |
APA | Dagan, G.,Koren, I.,Altaratz, O.,&Feingold, G..(2018).Feedback mechanisms of shallow convective clouds in a warmer climate as demonstrated by changes in buoyancy.ENVIRONMENTAL RESEARCH LETTERS,13(5). |
MLA | Dagan, G.,et al."Feedback mechanisms of shallow convective clouds in a warmer climate as demonstrated by changes in buoyancy".ENVIRONMENTAL RESEARCH LETTERS 13.5(2018). |
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