气候变化领域集成服务门户(CCPortal): The diurnal cycle of East Asian summer monsoon precipitation simulated by the Met Office Unified Model at convection-permitting scales

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DOI	10.1007/s00382-018-4368-z
	The diurnal cycle of East Asian summer monsoon precipitation simulated by the Met Office Unified Model at convection-permitting scales
	Li P.; Furtado K.; Zhou T.; Chen H.; Li J.; Guo Z.; Xiao C.
发表日期	2020
ISSN	0930-7575
起始页码	131
结束页码	151
卷号	55
英文摘要	A limited area convection permitting model (CPM) based on the Met Office Unified Model, with a 0.04° (4.4 km) horizontal grid spacing, is used to simulate an entire warm-season of the East Asian monsoon (from April to September 2009). The simulations are compared to rain gauge observations, reanalysis and to a lower resolution regional model with a 0.12° (13.2 km) grid spacing that has a parametrization of subgrid-scale convective clouds and precipitation. The 13.2 km simulation underestimates precipitation intensity, produces rainfall too frequently, and shows evident biases in reproducing the diurnal cycle of precipitation and low-level wind fields. In comparison, the CPM shows significant improvements in the spatial distribution of precipitation intensity, although it overestimates the intensity magnitude and has a wet bias over central eastern China. The diurnal cycle of precipitation over Mei-yu region, southern China and the eastern periphery of the Tibetan Plateau, as well as the diurnal cycle of low-level winds over both the Mei-yu region and southern China are better simulated by the CPM. Over the Mei-yu region, in both simulations and observations, the local atmospheric instability in the afternoon is favorable for upward motion and rainfall. The CPM receives more sensible heat flux from the surface, has a stronger upward motion, and overestimates water vapor convergence based on moisture budget diagnosis. All these processes help explain the excessive late afternoon rainfall over the Mei-yu region in the CPM simulation. © 2018, The Author(s).
英文关键词	Convection permitting model; Diurnal cycle; Moisture budget diagnosis; Precipitation characteristics; Water vapor transport
语种	英语
scopus关键词	climate modeling; convective cloud; diurnal variation; monsoon; precipitation intensity; rainfall; sensible heat flux; software; summer; wind field; China; Qinghai-Xizang Plateau; Citrus maxima
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145418
作者单位	LASG, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing, 100029, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Met Office, Exeter, United Kingdom; Chinese Academy of Meteorological Sciences, China Meteorological Administration, Beijing, 100081, China; National Climate Center, China Meteorological Administration, Beijing, China; Climate Change Research Center, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
推荐引用方式 GB/T 7714	Li P.,Furtado K.,Zhou T.,et al. The diurnal cycle of East Asian summer monsoon precipitation simulated by the Met Office Unified Model at convection-permitting scales[J],2020,55.
APA	Li P..,Furtado K..,Zhou T..,Chen H..,Li J..,...&Xiao C..(2020).The diurnal cycle of East Asian summer monsoon precipitation simulated by the Met Office Unified Model at convection-permitting scales.Climate Dynamics,55.
MLA	Li P.,et al."The diurnal cycle of East Asian summer monsoon precipitation simulated by the Met Office Unified Model at convection-permitting scales".Climate Dynamics 55(2020).