气候变化领域集成服务门户(CCPortal): Evolution of squall line variability and error growth in an ensemble of large eddy simulations

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DOI	10.5194/acp-23-565-2023
	Evolution of squall line variability and error growth in an ensemble of large eddy simulations
	Groot, Edward; Tost, Holger
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	565
结束页码	585
卷号	23 期号:1 页码:21
英文摘要	A chain of processes is identified that regulates much of the spread in an ensemble of squall lines in large eddy simulations with tight initial conditions. Patterns of gravity wave propagation de-correlate and restructure the initial condition spread until a second phase of convective initiation is taking place, i.e. after 30 min of simulation time. Subsequently, variability in this convective initiation and mass overturn is associated with differences in cold pool propagation within the ensemble (propagation at 2-4 m s(-1).An ensemble sensitivity analysis reveals that anomalies in squall-line-relative flow with respect to the ensemble mean are also associated with the secondary convective initiation. Downdraughts are fed with extra air by a convergence zone on the rearward flank of the updraughts. An analysis of difference growth within the ensemble shows that a substantial proportion of variability is explained by cold pool propagation contrasts during this stage (30-80 min), which is partly removed when a feature-relative perspective is taken. The patterns of coherent variability exist on the timescale of an hour and dissipate subsequently (80-100 min).
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000913064000001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273804
作者单位	Johannes Gutenberg University of Mainz
推荐引用方式 GB/T 7714	Groot, Edward,Tost, Holger. Evolution of squall line variability and error growth in an ensemble of large eddy simulations[J],2023,23(1):21.
APA	Groot, Edward,&Tost, Holger.(2023).Evolution of squall line variability and error growth in an ensemble of large eddy simulations.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(1),21.
MLA	Groot, Edward,et al."Evolution of squall line variability and error growth in an ensemble of large eddy simulations".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.1(2023):21.