气候变化领域集成服务门户(CCPortal): WRF Gray-Zone Simulations of Precipitation Over the Middle-East and the UAE: Impacts of Physical Parameterizations and Resolution

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DOI	10.1029/2021JD034648
	WRF Gray-Zone Simulations of Precipitation Over the Middle-East and the UAE: Impacts of Physical Parameterizations and Resolution
	Taraphdar S.; Pauluis O.M.; Xue L.; Liu C.; Rasmussen R.; Ajayamohan R.S.; Tessendorf S.; Jing X.; Chen S.; Grabowski W.W.
发表日期	2021
ISSN	2169897X
卷号	126 期号:10
英文摘要	Several single-year-long (2017) simulations with different configurations of the Weather Research and Forecasting (WRF) model over the United Arab Emirates (UAE) and the Middle-East at the convective gray-zone resolution (9 km) are evaluated in their ability to capture the temporal and spatial distributions of precipitation. Annual rainfall over the Middle-East is dominated by wintertime precipitation and is mostly initiated by the frontal systems intrusion. WRF at 9 km resolution shows good skill in capturing the synoptic and meso-scale precipitation distributions. The aerosol-aware Thompson microphysics scheme outperforms the WRF double moment 6 class microphysics by about 20% in annual mean precipitation over the Middle-East. Different Planetary Boundary Layer (PBL) physics leads to large differences in the annual rainfall over both the Middle-East (about 30%) and the UAE (about 45%). The Quasi-Normal Scale Elimination (QNSE) PBL scheme produces stronger precipitation than the Asymmetrical Convective Model and is in better agreement with observations. This difference is attributed to the former scheme producing a warmer and moister lower-level atmosphere that builds more substantial instability. Regions of stronger instability also depict decreases in lifting condensation level heights and increases in boundary layer height, suggesting that the boundary layer reaching the cloud base helps to trigger the convection and increase precipitation. Refinement in grid spacing (5 km) marginally improves the summertime precipitation over the Middle-East but significantly increases the computational cost. Current study also indicates that gray-zone simulations can perform as good as convection-permitting simulations by carefully choosing the right model physics packages for the synoptic and meso-scale precipitation. © 2021. The Authors.
英文关键词	Gray-zone; Middle-East; precipitation; WRF
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/185206
作者单位	Center for Prototype Climate Modeling, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates; Courant Institute of Mathematical Science, New York University, New York, NY, United States; Hua Xin Chuang Zhi Science and Technology LLC, Beijing, China; Research Application Laboratory, National Center for Atmospheric Research, Boulder, United States; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing, China
推荐引用方式 GB/T 7714	Taraphdar S.,Pauluis O.M.,Xue L.,et al. WRF Gray-Zone Simulations of Precipitation Over the Middle-East and the UAE: Impacts of Physical Parameterizations and Resolution[J],2021,126(10).
APA	Taraphdar S..,Pauluis O.M..,Xue L..,Liu C..,Rasmussen R..,...&Grabowski W.W..(2021).WRF Gray-Zone Simulations of Precipitation Over the Middle-East and the UAE: Impacts of Physical Parameterizations and Resolution.Journal of Geophysical Research: Atmospheres,126(10).
MLA	Taraphdar S.,et al."WRF Gray-Zone Simulations of Precipitation Over the Middle-East and the UAE: Impacts of Physical Parameterizations and Resolution".Journal of Geophysical Research: Atmospheres 126.10(2021).