气候变化领域集成服务门户(CCPortal): Stochastic Differential Equations for the Variability of Atmospheric Convection Fluctuating Around the Equilibrium

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DOI	10.1029/2019MS001638
	Stochastic Differential Equations for the Variability of Atmospheric Convection Fluctuating Around the Equilibrium
	Machulskaya E.; Seifert A.
发表日期	2019
ISSN	19422466
起始页码	2708
结束页码	2727
卷号	11 期号:8
英文摘要	Most convection parameterization schemes used within current atmospheric models make a convective equilibrium assumption, which breaks at the resolutions currently used by many numerical weather prediction models. To account for fluctuations of the cloud base mass flux about its equilibrium value, stochastic convection schemes have been developed for both deep (Plant & Craig, 2008, https://doi.org/10.1175/2007JAS2263.1) and shallow (Sakradzija et al., 2015, https://doi.org/10.5194/npg-22-65-2015) convection. Due to the need to explicitly track individual clouds in each grid box, these schemes can be computationally expensive. Motivated by the above considerations, the present study demonstrates how the machinery of the above schemes can be reduced to the solution of two ordinary stochastic differential equations for the cloud number and the total cloud base mass flux. The properties of the resulting stochastic processes for the cloud number and the total mass flux are not exactly equivalent to those of the original schemes but recover them to a very good approximation. © 2019. The Authors.
英文关键词	coarse-graining; stochastic convection; stochastic differential equations
语种	英语
scopus关键词	HTTP; Machinery; Natural convection; Ordinary differential equations; Random processes; Weather forecasting; Atmospheric convection; Atmospheric model; Coarse Graining; Convection parameterization; Convective equilibriums; Equilibrium value; Numerical weather prediction models; Stochastic differential equations; Stochastic systems; atmospheric convection; atmospheric modeling; climate modeling; stochasticity
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156873
作者单位	Deutscher Wetterdienst, Offenbach-am-Main, Germany
推荐引用方式 GB/T 7714	Machulskaya E.,Seifert A.. Stochastic Differential Equations for the Variability of Atmospheric Convection Fluctuating Around the Equilibrium[J],2019,11(8).
APA	Machulskaya E.,&Seifert A..(2019).Stochastic Differential Equations for the Variability of Atmospheric Convection Fluctuating Around the Equilibrium.Journal of Advances in Modeling Earth Systems,11(8).
MLA	Machulskaya E.,et al."Stochastic Differential Equations for the Variability of Atmospheric Convection Fluctuating Around the Equilibrium".Journal of Advances in Modeling Earth Systems 11.8(2019).