气候变化领域集成服务门户(CCPortal): Cold Pools as Conveyor Belts of Moisture

CCPortal

DOI	10.1029/2020GL087319
	Cold Pools as Conveyor Belts of Moisture
	Fuglestvedt H.F.; Haerter J.O.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:12
英文摘要	Observations and simulations have found convective cold pools to trigger and organize subsequent updrafts by modifying boundary layer temperature and moisture as well as by lifting air parcels at the outflow boundaries. We study the causality between cold pools and subsequent deep convection in idealized large-eddy simulations by tracking colliding outflow boundaries preceding hundreds of deep convection events. When outflow boundaries collide, their common front position remains immobile, whereas the internal cold pool dynamics continues for hours. We analyze how this dynamics “funnels” moisture from a relatively large volume into a narrow convergence zone. We quantify moisture convergence and separate the contribution from surface fluxes, which we find to play a secondary role. Our results highlight that dynamical effects are crucial in triggering convection, even in radiative-convective equilibrium. However, it is the low-level convergence resulting from this dynamics that removes inhibition, moistens the atmosphere aloft, and ultimately permits deep convection. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Belt conveyors; Boundary layers; Large eddy simulation; Moisture; Natural convection; Boundary layer temperature; Convergence zones; Conveyor belts; Deep convection; Dynamical effects; Moisture convergence; Outflow boundary; Radiative-convective equilibrium; Lakes; air temperature; atmospheric convection; atmospheric dynamics; boundary layer; cold pool
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/170237
作者单位	Department of Geosciences, University of Oslo, Oslo, Norway; Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark; Complexity and Climate, Leibniz Centre for Tropical Marine Research, Bremen, Germany; Physics & Earth Sciences, Jacobs University Bremen, Bremen, Germany
推荐引用方式 GB/T 7714	Fuglestvedt H.F.,Haerter J.O.. Cold Pools as Conveyor Belts of Moisture[J],2020,47(12).
APA	Fuglestvedt H.F.,&Haerter J.O..(2020).Cold Pools as Conveyor Belts of Moisture.Geophysical Research Letters,47(12).
MLA	Fuglestvedt H.F.,et al."Cold Pools as Conveyor Belts of Moisture".Geophysical Research Letters 47.12(2020).