气候变化领域集成服务门户(CCPortal): Diagnostic analysis of a regional heavy snowfall event over the Tibetan Plateau using NCEP reanalysis data and WRF

CCPortal

DOI	10.1007/s00382-020-05598-4
	Diagnostic analysis of a regional heavy snowfall event over the Tibetan Plateau using NCEP reanalysis data and WRF
	Liu, Lian; Ma, Yaoming; Yao, Nan; Ma, Weiqiang
通讯作者	Ma, YM (通讯作者)
发表日期	2021
ISSN	0930-7575
EISSN	1432-0894
起始页码	2451
结束页码	2467
卷号	56 期号:7-8
英文摘要	Snowstorms frequently occur in spring over the heterogeneous underlying surface of the Tibetan Plateau, causing both economic and societal damage. What the intensity of factors triggering snowstorms remains poorly understood. This study quantitatively diagnoses water vapor, the thermodynamic and dynamic conditions of a large-scale heavy snowfall event over the Tibetan Plateau using reanalysis data. Here we show, a cold vortex, the Southern Branch Trough and a meridional shear line are favorable synoptic systems. The snowfall is characterized by low-layer (- 8.3 x 10(-7) g s(-1) hPa(-1) cm(-2)) and whole-layer (- 4.5 x 10(-4) g s(-1) cm(-2)) moisture convergence, low-level atmospheric convergence and high-level divergence (+/- 3 x 10(-4) s(-1)), low-level positive vorticity (4.8 x 10(-4) s(-1)) and strong vertical velocity (- 4 Pa s(-1)). Although the convectively-stable stratification acted to suppress snowfall, the abundant water vapor and strong orographic uplift of Himalayas and the downhill wind speed convergence overcome this to trigger the heavy snowfall event witnessed in March 2017. These diagnostic results are well consistent with those from WRF simulation. Our study acknowledges the importance of WRF in diagnostic analysis, deepens the understanding of evolution mechanisms and provides theoretical references for accurate forecasting of such events over the Tibetan Plateau. It would aid the development of effective strategies for sustainable livestock, and the mitigation and prevention of snow disasters in this region.
关键词	INTERANNUAL VARIABILITY SYNOPTIC CONDITIONS CLIMATE-CHANGE WESTERLY JET DEPTH COVER PRECIPITATION CIRCULATION SNOWSTORM CHINA
英文关键词	Tibetan Plateau; Snowfall; Water vapor; Dynamic mechanism; WRF
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000605902300001
来源期刊	CLIMATE DYNAMICS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260134
推荐引用方式 GB/T 7714	Liu, Lian,Ma, Yaoming,Yao, Nan,et al. Diagnostic analysis of a regional heavy snowfall event over the Tibetan Plateau using NCEP reanalysis data and WRF[J]. 中国科学院青藏高原研究所,2021,56(7-8).
APA	Liu, Lian,Ma, Yaoming,Yao, Nan,&Ma, Weiqiang.(2021).Diagnostic analysis of a regional heavy snowfall event over the Tibetan Plateau using NCEP reanalysis data and WRF.CLIMATE DYNAMICS,56(7-8).
MLA	Liu, Lian,et al."Diagnostic analysis of a regional heavy snowfall event over the Tibetan Plateau using NCEP reanalysis data and WRF".CLIMATE DYNAMICS 56.7-8(2021).