| DOI: | 10.1002/2016MS000763
|
| Scopus记录号: | 2-s2.0-84995655013
|
| 论文题名: | Moisture-radiative cooling instability |
| 作者: | Beucler T; , Cronin T; W
|
| 刊名: | Journal of Advances in Modeling Earth Systems
|
| ISSN: | 19422466
|
| 出版年: | 2016
|
| 卷: | 8, 期:4 | | 起始页码: | 1620
|
| 结束页码: | 1640
|
| 语种: | 英语
|
| 英文关键词: | Clouds
; Heat radiation
; Meteorology
; Moisture
; Plasma stability
; Radiative transfer
; Stability
; Tropical engineering
; Tropics
; Climate
; Large-scale circulation
; Radiative transfer equations
; Radiative transfer model
; Radiative-convective equilibrium
; Statistical equilibrium state
; Tropical atmospheres
; Tropical meteorology
; Water vapor
; atmosphere
; atmospheric convection
; atmospheric modeling
; clear sky
; climate change
; cloud cover
; cooling
; instability
; meteorology
; radiative transfer
; underwater vehicle
; water vapor
|
| 英文摘要: | Radiative-convective equilibrium (RCE)—the statistical equilibrium state of the atmosphere where convection and radiation interact in the absence of lateral transport—is widely used as a basic-state model of the tropical atmosphere. The possibility that RCE may be unstable to development of large-scale circulation has been raised by recent modeling, theoretical, and observational studies, and could have profound consequences for our understanding of tropical meteorology and climate. Here, we study the interaction between moisture and radiative cooling as a contributor to instability of RCE. We focus on whether the total atmospheric radiative cooling decreases with column water vapor; this condition, which we call moisture-radiative cooling instability (MRCI), provides the potential for unstable growth of moist or dry perturbations. Analytic solutions to the gray-gas radiative transfer equations show that MRCI is satisfied when the total column optical depth—linked to column water vapor—exceeds a critical threshold. Both the threshold and the growth rate of the instability depend strongly on the shape of the water vapor perturbation. Calculations with a realistic radiative transfer model confirm the existence of MRCI for typical tropical values of column water vapor, but show even stronger dependence on the vertical structure of water vapor perturbation. Finally, we analyze the sensitivity of atmospheric radiative cooling to variability in column water vapor in observed tropical soundings. We find that clear-sky MRCI is satisfied across a range of locations and seasons in the real tropical atmosphere, with a partial growth rate of ∼1 month. © 2016. The Authors. |
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/75846
|
| Appears in Collections: | 影响、适应和脆弱性
气候变化与战略
|
|
There are no files associated with this item.
|
|
作者单位: | Program in Atmospheres, Oceans and Climate, Massachusetts Institute of Technology, Cambridge, MA, United States
|
| Recommended Citation: | |
Beucler T,, Cronin T,W. Moisture-radiative cooling instability[J]. Journal of Advances in Modeling Earth Systems,2016-01-01,8(4)
|
|
|