干旱区生态环境知识资源中心(Arid): Evaluation of Phase Discrimination Methods and Snow Fraction Perturbations in Arid Regions of Northwest China

Arid

DOI	10.1175/JHM-D-20-0118.1
	Evaluation of Phase Discrimination Methods and Snow Fraction Perturbations in Arid Regions of Northwest China
	Saydi, Muattar; Tang, Guoping; Qin, Yan; Fang, Hong; Chen, Xiaohua
通讯作者	Tang, GP (corresponding author), Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou, Peoples R China.
来源期刊	JOURNAL OF HYDROMETEOROLOGY
ISSN	1525-755X
EISSN	1525-7541
出版年	2021
卷号	22 期号:2 页码:353-369
英文摘要	Snow fraction has a direct impact on water resources in arid regions. The selection of proper methods for estimating snow fraction is thus essential. Two temperature-based and two humidity-based approaches to discriminate precipitation phase were evaluated using daily meteorological observations over the past six decades in Xinjiang in arid northwest China. The main findings included that 1) the finest discrimination was achieved by the wet-bulb temperature (T-w) method whereas the single temperature threshold at 0 degrees C produces the poorest result; the performances of the Dai and humidity-dependent empirical method (T-RH) methods were between them, with slightly lower error using the Dai method. Also, the T-w method is the least sensitive to regional heterogeneity and less affected by distinct changes in elevation; the other three methods, however, are biased mostly toward underestimating snow and show larger variations due to the regional discrepancies. Careful adjustment of snow discrimination thresholds based on the local properties of observation spots is needed for these methods. 2) Despite widespread warming, snow fraction perturbations in Xinjiang are characterized mainly by insignificant changes plus pronounced reductions at high mountain sites. Proxy drivers of such changes can be better explained by considering the hydrothermal diversity and changing climatic factors. Across the wetter subregions, snowfall has been significantly increasing, and the positive impact of which on snow fraction was hindered by significant warming, particularly in winter, and summer rainfall; across the drier subregions, however, insignificant change in snow fraction corresponds to a slow and insignificant increase in snowfall joined by the negative impacts of significant winter warming and summer rainfall.
英文关键词	Precipitation Snow Climate change Trends Asia
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000646373400007
WOS关键词	PRECIPITATION PHASE ; CLIMATE-CHANGE ; CENTRAL-ASIA ; TEMPERATURE ; RAIN ; SURFACE ; VARIABILITY ; XINJIANG ; TRENDS ; CHALLENGES
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350918
作者单位	[Saydi, Muattar; Tang, Guoping; Fang, Hong; Chen, Xiaohua] Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou, Peoples R China; [Qin, Yan] Xinjiang Univ, Coll Resource & Environm Sci, Urumqi, Peoples R China
推荐引用方式 GB/T 7714	Saydi, Muattar,Tang, Guoping,Qin, Yan,et al. Evaluation of Phase Discrimination Methods and Snow Fraction Perturbations in Arid Regions of Northwest China[J]. 新疆大学,2021,22(2):353-369.
APA	Saydi, Muattar,Tang, Guoping,Qin, Yan,Fang, Hong,&Chen, Xiaohua.(2021).Evaluation of Phase Discrimination Methods and Snow Fraction Perturbations in Arid Regions of Northwest China.JOURNAL OF HYDROMETEOROLOGY,22(2),353-369.
MLA	Saydi, Muattar,et al."Evaluation of Phase Discrimination Methods and Snow Fraction Perturbations in Arid Regions of Northwest China".JOURNAL OF HYDROMETEOROLOGY 22.2(2021):353-369.