DOI: 10.1007/s00382-013-1703-2
Scopus记录号: 2-s2.0-84886727091
论文题名: Changes in gross moist stability in the tropics under global warming
作者: Chou C. ; Wu T.-C. ; Tan P.-H.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 41, 期: 2017-09-10 起始页码: 2481
结束页码: 2496
语种: 英语
英文关键词: Atmospheric stability
; Global warming
; Gross moist stability
; Tropical circulation
英文摘要: Gross moist stability, an effective static stability, in the tropics is examined in observations and model simulations. Under convective quasi-equilibrium closure, gross moist stability, a vertical integration of the vertical moist static energy gradient weighted by pressure velocity, is derived based on an approximately moist adiabatic process associated with deep convection. In climatology, gross moist stability is generally similar to the spatial distribution of mean precipitation. In global warming simulations, gross moist stability tends to increase in the tropics. It implies a more stable atmosphere, which is consistent with the weakening of tropical circulation found in climate models. Main effects, which induce the changes in gross moist stability, include the low-level moisture effect, the maximum level of convection (MLC) effect, i.e., the depth of deep convection, and the dry static energy effect associated with stratification of temperature, with the first two also found in climatology. Because of the strong cancellation between the effects of low-level moisture and dry static energy due to the moist adiabatic process of deep convection, the effect of MLC, which has been overlooked in measuring atmospheric stability, is crucial in determining the sign of changes in gross moist stability. Gross moist stability is a better index to represent changes in atmospheric stability in the tropics under global warming, compared to both dry and moist static stability. © 2013 Springer-Verlag Berlin Heidelberg. 资助项目: DOE, U.S. Department of Energy
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54737
Appears in Collections: 过去全球变化的重建
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作者单位: Research Center for Environmental Changes, Academia Sinica, P.O. Box 1-48, Taipei, 11529, Taiwan; Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan; Department of History and Geography, National Chiayi University, Chiayi, Taiwan
Recommended Citation:
Chou C.,Wu T.-C.,Tan P.-H.. Changes in gross moist stability in the tropics under global warming[J]. Climate Dynamics,2013-01-01,41(2017-09-10)