气候变化领域集成服务门户(CCPortal): Cascading Toward a Kilometer-Scale GCM: Impacts of a Scale-Aware Convection Parameterization in the Goddard Earth Observing System GCM

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DOI	10.1029/2020GL087682
	Cascading Toward a Kilometer-Scale GCM: Impacts of a Scale-Aware Convection Parameterization in the Goddard Earth Observing System GCM
	Freitas S.R.; Putman W.M.; Arnold N.P.; Adams D.K.; Grell G.A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	The National Aeronautics and Space Administration (NASA) Goddard Earth Observing System global circulation model (GCM) is evaluated through a cascade of simulations with increasing horizontal resolution. This model employs a nonhydrostatic dynamical core and includes a scale-aware, deep convection parameterization (DPCP). The 40-day simulations at six resolutions (100 km to 3 km) with unvarying model formulation were produced. At the highest resolution, extreme experiments were carried out: one with no DPCP and one with its scale awareness eliminated. Simulated precipitation, radiative balance, and atmospheric thermodynamic and dynamical variables are well reproduced with respect to both observational and reanalysis data. As model resolution increases, the convective precipitation smoothly transitions from being mostly produced by the convection parameterization to the cloud microphysics parameterization. However, contrary to current thought, these extreme cases argue for maintaining, to some extent, the scale-aware DPCP even at 3-km scale, as the run relying solely on explicit grid-scale production of rainfall performs more poorly at this resolution. ©2020. American Geophysical Union. All Rights Reserved. This article has been contributed to by US Government employees and their work is in the public domain in the USA.
英文关键词	Earth (planet); NASA; Precipitation (meteorology); Cloud microphysics; Convection parameterization; Convective precipitation; Dynamical variables; Global circulation model; Goddard earth observing systems; Highest resolutions; Horizontal resolution; Parameterization; cloud microphysics; EOS; general circulation model; parameterization; rainfall; simulation
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/169812
作者单位	Goddard Earth Sciences Technology and Research, Universities Space Research Association, Columbia, MD, United States; Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Centro de Ciencias de la Atmósfera, UNAM, Mexico City, Mexico; Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, United States
推荐引用方式 GB/T 7714	Freitas S.R.,Putman W.M.,Arnold N.P.,et al. Cascading Toward a Kilometer-Scale GCM: Impacts of a Scale-Aware Convection Parameterization in the Goddard Earth Observing System GCM[J],2020,47(17).
APA	Freitas S.R.,Putman W.M.,Arnold N.P.,Adams D.K.,&Grell G.A..(2020).Cascading Toward a Kilometer-Scale GCM: Impacts of a Scale-Aware Convection Parameterization in the Goddard Earth Observing System GCM.Geophysical Research Letters,47(17).
MLA	Freitas S.R.,et al."Cascading Toward a Kilometer-Scale GCM: Impacts of a Scale-Aware Convection Parameterization in the Goddard Earth Observing System GCM".Geophysical Research Letters 47.17(2020).