气候变化领域集成服务门户(CCPortal): Effect of shallow convection parametrization on cloud resolving NWP forecasts over the Eastern Mediterranean

CCPortal

DOI	10.1016/j.atmosres.2020.105213
	Effect of shallow convection parametrization on cloud resolving NWP forecasts over the Eastern Mediterranean
	Khain P.; Levi Y.; Muskatel H.; Shtivelman A.; Vadislavsky E.; Stav N.
发表日期	2021
ISSN	0169-8095
卷号	247
英文摘要	Numerical Weather Prediction (NWP) models with coarser resolution than ~4 km use convection parametrization to describe both deep and shallow convection. Convection permitting models with grid spacing below ~4 km usually describe deep convection on grid scale, but still parametrize the shallow convection, being sub-grid scale process. Many of these parametrizations are based on the mass-flux approach. The artificial combination of resolved and parametrized convection might deteriorate the model forecast skill, particularly precipitation. In this study, we are using the COSMO 2.5 km resolution limited area NWP model over the eastern Mediterranean region to analyze the effect of the mass-flux shallow convection parametrization (SCP) on the forecasts skill. We show that SCP entrainment rate, as well as restrictions on the shallow convection development height and maximum updraft speed, have a crucial effect on the forecasts of precipitation, temperature and moisture. Physically motivated tuning of these parameters can improve the model forecasts significantly. Finally, we estimate the climatic zones and seasons where SCP is expected to be particularly important for NWP. © 2020 Elsevier B.V.
语种	英语
scopus关键词	Earth atmosphere; Meteorology; Cloud-resolving; Coarser resolution; Eastern Mediterranean; Entrainment rates; Numerical weather prediction models; Parametrizations; Shallow convection; Sub-grid scale process; Weather forecasting; atmospheric convection; climate modeling; climate prediction; parameterization; precipitation (climatology); satellite data; weather forecasting; Mediterranean Region
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141750
作者单位	Israel Meteorological Service, Beit Dagan, Israel
推荐引用方式 GB/T 7714	Khain P.,Levi Y.,Muskatel H.,et al. Effect of shallow convection parametrization on cloud resolving NWP forecasts over the Eastern Mediterranean[J],2021,247.
APA	Khain P.,Levi Y.,Muskatel H.,Shtivelman A.,Vadislavsky E.,&Stav N..(2021).Effect of shallow convection parametrization on cloud resolving NWP forecasts over the Eastern Mediterranean.Atmospheric Research,247.
MLA	Khain P.,et al."Effect of shallow convection parametrization on cloud resolving NWP forecasts over the Eastern Mediterranean".Atmospheric Research 247(2021).