气候变化领域集成服务门户(CCPortal): Challenging and Improving the Simulation of Mid-Level Mixed-Phase Clouds Over the High-Latitude Southern Ocean

CCPortal

DOI	10.1029/2020JD033490
	Challenging and Improving the Simulation of Mid-Level Mixed-Phase Clouds Over the High-Latitude Southern Ocean
	Vignon É.; Alexander S.P.; DeMott P.J.; Sotiropoulou G.; Gerber F.; Hill T.C.J.; Marchand R.; Nenes A.; Berne A.
发表日期	2021
ISSN	2169897X
卷号	126 期号:7
英文摘要	Climate models exhibit major radiative biases over the Southern Ocean owing to a poor representation of mixed-phase clouds. This study uses the remote-sensing dataset from the Measurements of Aerosols, Radiation and Clouds over the Southern Ocean (MARCUS) campaign to assess the ability of the Weather Research and Forecasting (WRF) model to reproduce frontal clouds off Antarctica. It focuses on the modeling of thin mid-level supercooled liquid water layers which precipitate ice. The standard version of WRF produces almost fully glaciated clouds and cannot reproduce cloud top turbulence. Our work demonstrates the importance of adapting the ice nucleation parameterization to the pristine austral atmosphere to reproduce the supercooled liquid layers. Once simulated, droplets significantly impact the cloud radiative effect by increasing downwelling longwave fluxes and decreasing downwelling shortwave fluxes at the surface. The net radiative effect is a warming of snow and ice covered surfaces and a cooling of the ocean. Despite improvements in our simulations, the local turbulent circulation related to cloud-top radiative cooling is not properly reproduced, advocating for the need to develop a parameterization for top-down convection to capture the turbulence-microphysics interplay at cloud top. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Antarctica; ice nuclei particles; microphysics; mixed-phase clouds; Southern Ocean
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185357
作者单位	Environmental Remote Sensing Laboratory (LTE), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; Laboratoire de Météorologie Dynamique/IPSL/Sorbone Université/CNRS, UMR 8539, Paris, France; Australian Antarctic Division, Kingston, TAS, Australia; Australian Antarctic Program Partnership, Institute for Marine and Antarctic Science, University of Tasmania, Hobart, TAS, Australia; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Laboratory of Atmospheric Processes and their Impacts (LAPI), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; Department of Meteorology and Bolin Center for Climate Research, Stockholm University, Stockholm, Sweden; WSL Institute for Snow and Avalanche Research SLF, Davos, Switzerland; Laboratory of Cryospheric Sciences (CRYOS), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Cente...
推荐引用方式 GB/T 7714	Vignon É.,Alexander S.P.,DeMott P.J.,et al. Challenging and Improving the Simulation of Mid-Level Mixed-Phase Clouds Over the High-Latitude Southern Ocean[J],2021,126(7).
APA	Vignon É..,Alexander S.P..,DeMott P.J..,Sotiropoulou G..,Gerber F..,...&Berne A..(2021).Challenging and Improving the Simulation of Mid-Level Mixed-Phase Clouds Over the High-Latitude Southern Ocean.Journal of Geophysical Research: Atmospheres,126(7).
MLA	Vignon É.,et al."Challenging and Improving the Simulation of Mid-Level Mixed-Phase Clouds Over the High-Latitude Southern Ocean".Journal of Geophysical Research: Atmospheres 126.7(2021).