globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2015MS000621
Scopus记录号: 2-s2.0-84979520538
论文题名:
Effects of cumulus parameterization closures on simulations of summer precipitation over the United States coastal oceans
作者: Qiao F; , Liang X; -Z
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2016
卷: 8, 期:2
起始页码: 764
结束页码: 785
语种: 英语
英文关键词: Algorithms ; Climate models ; Clouds ; Geographical distribution ; Moisture ; Parameterization ; Rain ; Stability ; Systematic errors ; Velocity ; Closure assumptions ; Coastal ocean ; Cumulus parameterization ; Moisture convergence ; Precipitation patterns ; Regional climate model simulation ; Spatio-temporal variation ; Summer precipitation ; Precipitation (meteorology) ; algorithm ; climate modeling ; closure ; cumulus ; diurnal variation ; instability ; parameterization ; precipitation (climatology) ; precipitation assessment ; precipitation intensity ; regional climate ; simulation ; summer ; Atlantic Coast [North America] ; Atlantic Coast [United States] ; Atlantic Ocean ; Gulf of Mexico ; United States
英文摘要: This study evaluates the effects of major cumulus parameterization closures on summer precipitation simulations over the U.S. Atlantic Coasts and Gulf of Mexico. A series of mesoscale regional climate model simulations using an Ensemble Cumulus Parameterization (ECP) that incorporates multiple alternate closure schemes into a single cloud model formulation are conducted and compared to determine the systematic errors and relative performances of individual and combined closures in capturing precipitation spatiotemporal variations. The results show that closure algorithms largely affect precipitation's geographic distribution, frequency and intensity, and diurnal cycle. The quasi-equilibrium and total instability adjustment closures simulate widespread wet biases, while the instability tendency closure produces systematic dry biases. Two closure algorithms based on the average vertical velocity at the cloud base and column moisture convergence complementarily reproduce the observed precipitation pattern and amount, and capture the frequency of heavy rainfall events better than other closures. In contrast, the instability tendency closures are better at capturing the diurnal phase but yield much larger deficits in amount. Therefore, cloud base vertical velocity and moisture convergence may be the primary factors controlling precipitation seasonal mean and daily variation, while the instability tendency may play a critical role in regulating the diurnal cycle phase. © 2016. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75891
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: Key Laboratory of Geographic Information Science, Ministry of Education, East China Normal University, Shanghai, China; Department of Atmospheric Sciences, University of Illinois at Urbana-Champaign, Champaign, IL, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; Department of Atmospheric and Oceanic Science, University of Maryland at College Park, College Park, MD, United States

Recommended Citation:
Qiao F,, Liang X,-Z. Effects of cumulus parameterization closures on simulations of summer precipitation over the United States coastal oceans[J]. Journal of Advances in Modeling Earth Systems,2016-01-01,8(2)
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