气候变化领域集成服务门户(CCPortal): Increasing Resolution and Resolving Convection Improve the Simulation of Cloud-Radiative Effects Over the North Atlantic

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DOI	10.1029/2020JD032667
	Increasing Resolution and Resolving Convection Improve the Simulation of Cloud-Radiative Effects Over the North Atlantic
	Senf F.; Voigt A.; Clerbaux N.; Hünerbein A.; Deneke H.
发表日期	2020
ISSN	2169897X
卷号	125 期号:19
英文摘要	Clouds interact with atmospheric radiation and substantially modify the Earth's energy budget. Cloud formation processes occur over a vast range of spatial and temporal scales, which make their thorough numerical representation challenging. Therefore, the impact of parameter choices for simulations of cloud-radiative effects is assessed in the current study. Numerical experiments are carried out using the ICOsahedral Nonhydrostatic (ICON) model with varying grid spacings between 2.5 and 80 km and with different subgrid-scale parameterization approaches. Simulations are performed over the North Atlantic with either one-moment or two-moment microphysics and with convection being parameterized or explicitly resolved by grid-scale dynamics. Simulated cloud-radiative effects are compared to products derived from Meteosat measurements. Furthermore, a sophisticated cloud classification algorithm is applied to understand the differences and dependencies of simulated and observed cloud-radiative effects. The cloud classification algorithm developed for the satellite observations is also applied to the simulation output based on synthetic infrared brightness temperatures, a novel approach that is not impacted by changing insolation and guarantees a consistent and fair comparison. It is found that flux biases originate equally from clear-sky and cloudy parts of the radiation field. Simulated cloud amounts and cloud-radiative effects are dominated by marine, shallow clouds, and their behavior is highly resolution dependent. Bias compensation between shortwave and longwave flux biases, seen in the coarser simulations, is significantly diminished for higher resolutions. Based on the analysis results, it is argued that cloud-microphysical and cloud-radiative properties have to be adjusted to further improve agreement with observed cloud-radiative effects. © 2020. The Authors.
英文关键词	Bias Decomposition; Cloud Classification; Cloud-Radiative Effects; High-Resolution Simulations; Meteosat Observations; TOA Energy Budget
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/185708
作者单位	Leibniz Institute for Tropospheric Research, Leipzig, Germany; Institute for Meteorology and Climate Research - Department Troposphere Research, Karlsruhe Institute of Technology, Karlsruhe, Germany; Lamont-Doherty Earth Observatory, Columbia University, New York City, NY, United States; Royal Meteorological Institute of Belgium, Brussels, Belgium
推荐引用方式 GB/T 7714	Senf F.,Voigt A.,Clerbaux N.,et al. Increasing Resolution and Resolving Convection Improve the Simulation of Cloud-Radiative Effects Over the North Atlantic[J],2020,125(19).
APA	Senf F.,Voigt A.,Clerbaux N.,Hünerbein A.,&Deneke H..(2020).Increasing Resolution and Resolving Convection Improve the Simulation of Cloud-Radiative Effects Over the North Atlantic.Journal of Geophysical Research: Atmospheres,125(19).
MLA	Senf F.,et al."Increasing Resolution and Resolving Convection Improve the Simulation of Cloud-Radiative Effects Over the North Atlantic".Journal of Geophysical Research: Atmospheres 125.19(2020).