Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Arid Meteorology》 2017-04
Add to Favorite Get Latest Update

Spatial and Temporal Variation Characteristics of the Onset and Melting Dates of Snow Cover and Its Relationship with Air Temperature and Precipitation in Jilin Province During 1960-2015

FU Shuai;JIANG Yong;XU Shiqi;ZHANG Xiaoquan;Institute of Space Weather,Nanjing University of Information Science & Technology;Jilin Provincial Climate Center;Wuyi Meteorological Station of Zhejiang Province;  
Based on the observations of snow cover onset date(SCOD) and melting date(SCMD) and daily average air temperature,precipitation from 45 meteorological stations in Jilin Province during 1960-2015,the temporal and spatial variation characteristics of SCOD,SCMD and its response to climate change were investigated. Results are as follows:(1) The spatial distributions of SCOD and SCMD were significantly different. SCOD was earlier and SCMD was later in the southeast mountain area of Jinlin Province,which resulted in longer possible snow cover duration(SCD). On the contrary,SCOD was later and SCMD was earlier in the northwest plains,which caused a relatively short possible SCD.(2) The average SCOD and SCMD were November 9 and April 1,respectively,and the mean SCD was 144 days in Jilin Province.(3) In the past 56 years,the change trends of SCOD and SCMD weren't obvious on the whole,but the stage characteristic was significant. SCOD was earlier and SCMD was later before the 1980 s,but it was the opposite after the 1990 s,which indicated that the possible SCD shortened. The significant mutations of SCOD and SCMD occurred in 1983 and1991,respectively.(4) SCOD and SCMD were quite sensitive to the temperature change during 1960-2015. SCOD was positively correlated with monthly average air temperature from August to November,while SCOD was negatively correlated with average temperature in March and April. SCOD and SCMD were separately controlled by the starting date of 0 ℃ temperature and the ending date of 10℃ temperature. In addition,the correlation between SCOD and precipitation in October was negative and very significant,while that between SCMD and precipitation in April was positive and remarkable.
【Fund】: 国家自然科学基金项目(41174165);; 公益性行业(气象)科研专项(GYHY201306073)共同资助
【CateGory Index】: P426.635;P468.02
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved