Discriminating the precipitation phase based on different temperature thresholds in the Songhua River Basin, China

doi:10.1016/j.atmosres.2018.02.002

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	Discriminating the precipitation phase based on different temperature thresholds in the Songhua River Basin, China
	Chao Qin 1; Keyuan Zhong 1; Fenli Zheng 1,2; Ximeng Xu 1; Zheng, FL (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
刊名	ATMOSPHERIC RESEARCH
	2018
卷号	205 页码:48-59
关键词	Precipitation Phase Threshold Temperature Snowfall Hydrologic Process Hydrological Model The Songhua River Basin
ISSN号	0169-8095
DOI	10.1016/j.atmosres.2018.02.002
文献子类	Article
英文摘要	Different precipitation phases (rain, snow or sleet) differ greatly in their hydrological and erosional processes. Therefore, accurate discrimination of the precipitation phase is highly important when researching hydrologic processes and climate change at high latitudes and mountainous regions. The objective of this study was to identify suitable temperature thresholds for discriminating the precipitation phase in the Songhua River Basin (SRB) based on 20-year daily precipitation collected from 60 meteorological stations located in and around the basin. Two methods, the air temperature method (AT method) and the wet bulb temperature method (WBT method), were used to discriminate the precipitation phase. Thirteen temperature thresholds were used to discriminate snowfall in the SRB. These thresholds included air temperatures from 0 to 5.5 degrees C at intervals of 0.5 degrees C and the wet bulb temperature (WBT). Three evaluation indices, the error percentage of discriminated snowfall days (Ep), the relative error of discriminated snowfall (Re) and the determination coefficient (R-2), were applied to assess the discrimination accuracy. The results showed that 2.5 degrees C was the optimum threshold temperature for discriminating snowfall at the scale of the entire basin. Due to differences in the landscape conditions at the different stations, the optimum threshold varied by station. The optimal threshold ranged 1.5-4.0 degrees C, and 19 stations, 17 stations and 18 stations had optimal thresholds of 2.5 degrees C, 3.0 degrees C, and 3.5 degrees C respectively, occupying 90% of all stations. Compared with using a single suitable temperature threshold to discriminate snowfall throughout the basin, it was more accurate to use the optimum threshold at each station to estimate snowfall in the basin. In addition, snowfall was underestimated when the temperature threshold was the wBT and when the temperature threshold was below 2.5 degrees C, whereas snowfall was overestimated when the temperature threshold exceeded 4.0 degrees C at most stations. The results of this study provide information for climate change research and hydrological process simulations in the SRB, as well as provide reference information for discriminating precipitation phase in other regions.
学科主题	Meteorology & Atmospheric Sciences
出版地	360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000429512200006
资助机构	National Key R&D Program of China [2016YFE0202900] ; National Key R&D Program of China [2016YFE0202900] ; National Natural Science Foundation of China [41571263] ; National Natural Science Foundation of China [41571263] ; National Key R&D Program of China [2016YFE0202900] ; National Key R&D Program of China [2016YFE0202900] ; National Natural Science Foundation of China [41571263] ; National Natural Science Foundation of China [41571263]
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/8244]
专题	水保所科研产出--SCI_2018--SCI
通讯作者	Zheng, FL (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China 2.CAS & MWR, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Chao Qin,Keyuan Zhong,Fenli Zheng,et al. Discriminating the precipitation phase based on different temperature thresholds in the Songhua River Basin, China[J]. ATMOSPHERIC RESEARCH,2018,205:48-59.
APA	Chao Qin,Keyuan Zhong,Fenli Zheng,Ximeng Xu,&Zheng, FL .(2018).Discriminating the precipitation phase based on different temperature thresholds in the Songhua River Basin, China.ATMOSPHERIC RESEARCH,205,48-59.
MLA	Chao Qin,et al."Discriminating the precipitation phase based on different temperature thresholds in the Songhua River Basin, China".ATMOSPHERIC RESEARCH 205(2018):48-59.