globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2016MS000855
Scopus记录号: 2-s2.0-85016420908
论文题名:
A toy model of tropical convection with a moisture storage closure
作者: Masunaga H; , Sumi Y
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期:1
起始页码: 647
结束页码: 667
语种: 英语
英文关键词: Advection ; Benchmarking ; Precipitation (meteorology) ; Tropical engineering ; Tropics ; Conceptual model ; Delayed response ; Diabatic forcing ; Model performance ; Moist convection ; Moisture advection ; Tropical convection ; Zero-dimensional ; Moisture ; advection ; array ; atmospheric convection ; benchmarking ; conceptual framework ; model test ; moisture ; performance assessment ; precipitation (climatology) ; stratification ; tropical meteorology ; water vapor
英文摘要: A time-dependent, zero-dimensional toy model is constructed to study the large-scale variability in association with tropical moist convection. Case studies from sounding-array observations are analyzed as a benchmark to test the model performance. The model predicts the vertical integral of vertical moisture advection decomposed into the deep convective and congestus/stratiform modes. A closure representing the consumption efficiency of water vapor into precipitation is introduced using the moisture storage ratio, or the degree to which the vertical moisture advection associated with each vertical mode accounts for moisture storage. The observations suggest that this moisture consumption is highly inefficient for the convective/stratiform mode while efficient for the deep convective mode. The model solution is interpreted as a delayed response to the diabatic forcing, unless the sum of the moisture storage ratio and gross moist stability is negative, in which case the system is unstable. Baseline experiments with a fixed moisture storage closure overall reproduce the vertical moisture advection and precipitation as observed, but fail to simulate a sharp pickup of precipitation in the well-known moisture-rainfall curve. This deficiency is eliminated when the moisture storage ratio is allowed to vary as convection intensifies and dissipates. © 2017. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75822
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan; Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan

Recommended Citation:
Masunaga H,, Sumi Y. A toy model of tropical convection with a moisture storage closure[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(1)
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