气候变化领域集成服务门户(CCPortal): 3D-var assimilation of GTS observation with the gravity wave drag scheme improves summer high resolution climate simulation over the Tibetan Plateau

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DOI	10.1007/s00382-021-05720-0
	3D-var assimilation of GTS observation with the gravity wave drag scheme improves summer high resolution climate simulation over the Tibetan Plateau
	Xie, Qian; Yang, Yi; Qiu, Xiaobin; Ma, Yuanyuan; Lai, Anwei; Lin, Erliang; Mai, Xiaoping
通讯作者	Yang, Y (通讯作者)，Lanzhou Univ, Res Ctr Dev Earth Syst Model, Coll Atmospher Sci, Lanzhou 730000, Peoples R China. ; Yang, Y (通讯作者)，Lanzhou Univ, Coll Atmospher Sci, Key Lab Climate Resource Dev & Disaster Prevent G, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0930-7575
EISSN	1432-0894
起始页码	469
结束页码	487
卷号	57 期号:1-2
英文摘要	The Tibetan Plateau (TP) is one of the most complicated orographic regions worldwide, and due to the lack of quantitative observations, the different simulation biases are still existing via various climate models over the TP. In this study, a one-summer-month 6-km dynamical downscaling simulation is conducted to evaluate the improvement of the new gravity wave drag (GWD) scheme and cycled assimilation of observations from the Global Telecommunications System (GTS) by the three-dimensional variational data assimilation (3D-Var) method. The updated GWD scheme provides better simulation results for surface and vertical winds, temperature, and humidity. 3D-Var cycled assimilation of GTS observations with the GWD scheme further improves the wind forecasting at the upper atmosphere levels but enhances temperature cold bias over the TP, and the latter may be partly related to less surface sensible and latent heat flux after assimilation. Notably, it obviously performs better at the spatial distribution and temporal variation of daily precipitation, thus effectively reduces the precipitation wet bias, especially for the eastern TP. This benefits from the more accurate simulation of different precipitation categories by data assimilation, especially for the light rain (1-10 mm/day). The mechanism of less precipitation wet bias is that assimilation of GTS observation results in weaker monsoon flow water vapor transport from low-latitude oceans, weaker Tibetan High with more accurate circulation fields and less upward vertical velocity. This research may provide guidance for establishing a downscaling dataset of higher spatiotemporal resolution for the TP.
英文关键词	Tibetan Plateau; Dynamical downscaling; Data assimilation; High resolution; Summer precipitation
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000630664200001
来源期刊	CLIMATE DYNAMICS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/255106
作者单位	[Xie, Qian; Yang, Yi; Lin, Erliang] Lanzhou Univ, Res Ctr Dev Earth Syst Model, Coll Atmospher Sci, Lanzhou 730000, Peoples R China; [Xie, Qian; Yang, Yi; Lin, Erliang] Lanzhou Univ, Coll Atmospher Sci, Key Lab Climate Resource Dev & Disaster Prevent G, Lanzhou 730000, Peoples R China; [Qiu, Xiaobin] Tianjin Inst Meteorol Sci, Tianjin 300074, Peoples R China; [Qiu, Xiaobin] Tianjin Key Lab Ocean Meteorol, Tianjin 300074, Peoples R China; [Ma, Yuanyuan] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou 730000, Peoples R China; [Lai, Anwei] China Meteorol Adm, Hubei Key Lab Heavy Rain Monitoring & Warning Res, Inst Heavy Rain, Wuhan 430205, Peoples R China; [Mai, Xiaoping] Natl Marine Environm Forecasting Ctr, Key Lab Res Marine Hazards Forecasting, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Xie, Qian,Yang, Yi,Qiu, Xiaobin,et al. 3D-var assimilation of GTS observation with the gravity wave drag scheme improves summer high resolution climate simulation over the Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2021,57(1-2).
APA	Xie, Qian.,Yang, Yi.,Qiu, Xiaobin.,Ma, Yuanyuan.,Lai, Anwei.,...&Mai, Xiaoping.(2021).3D-var assimilation of GTS observation with the gravity wave drag scheme improves summer high resolution climate simulation over the Tibetan Plateau.CLIMATE DYNAMICS,57(1-2).
MLA	Xie, Qian,et al."3D-var assimilation of GTS observation with the gravity wave drag scheme improves summer high resolution climate simulation over the Tibetan Plateau".CLIMATE DYNAMICS 57.1-2(2021).