气候变化领域集成服务门户(CCPortal): Shear-Parallel Tropical Convective Systems: Importance of Cold Pools and Wind Shear

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DOI	10.1029/2020GL087720
	Shear-Parallel Tropical Convective Systems: Importance of Cold Pools and Wind Shear
	Grant L.D.; Moncrieff M.W.; Lane T.P.; van den Heever S.C.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:12
英文摘要	The impact of cold pools on line-orientated convective systems is assessed using idealized simulations of tropical oceanic convection under weak, moderate, and strong wind shear regimes. Cold pools are weakened by suppressing evaporation in the shallow subcloud layer. Analysis of objectively identified convective systems reveals that the convection with weaker cold pools is more often oriented parallel, rather than perpendicular, to the wind shear. The cold pool-induced orientation changes are most pronounced in the strong shear environment. Interactions between convective orientation and the tropical atmosphere are assessed. Simulations with shear-parallel convection demonstrate more top-of-atmosphere upwelling longwave radiation and less reflected shortwave radiation due to changes in convective anvils, faster-propagating larger-scale gravity waves, narrower cross-shear moisture distributions, and differences in convective momentum fluxes. The results highlight critical interactions across convective scales, mesoscales, and climate scales, as well as avenues for parameterizing structural modes of mesoscale-organized convection in global models. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Climate models; Lakes; Tropics; Induced orientation; Long-wave radiation; Moisture distribution; Shear environments; Short-wave radiation; Top of atmospheres; Tropical atmospheres; Tropical oceanic convection; Shear flow; atmospheric convection; cold pool; evaporation; gravity wave; longwave radiation; oceanic convection; shortwave radiation; top of atmosphere; tropical environment; wind shear
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170208
作者单位	Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; National Center for Atmospheric Research, Boulder, CO, United States; School of Earth Science, The University of Melbourne, Parkville, VIC, Australia; ARC Centre of Excellence for Climate Extremes, Parkville, VIC, Australia
推荐引用方式 GB/T 7714	Grant L.D.,Moncrieff M.W.,Lane T.P.,et al. Shear-Parallel Tropical Convective Systems: Importance of Cold Pools and Wind Shear[J],2020,47(12).
APA	Grant L.D.,Moncrieff M.W.,Lane T.P.,&van den Heever S.C..(2020).Shear-Parallel Tropical Convective Systems: Importance of Cold Pools and Wind Shear.Geophysical Research Letters,47(12).
MLA	Grant L.D.,et al."Shear-Parallel Tropical Convective Systems: Importance of Cold Pools and Wind Shear".Geophysical Research Letters 47.12(2020).