Plateau Meteorology

Plateau Meteorology >

2018 , Vol. 37 >Issue 4: 936 - 945

DOI: https://doi.org/10.7522/j.issn.1000-0534.2018.00001

Dynamic Snow Melting Process and Its Relationship with Air Temperature in the Hinterland of Sanjiangyuan Region in Qinghai-Tibetan Plateau

  • ZHANG Juan ,
  • XU Weixin ,
  • WANG Li ,
  • ZHOU Huakun
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  • Meteorological Instutute of Qinghai Province, Xining 810001, Qinghai, China;Laboratory of Disaster Prevention and Reduction of Qinghai Province, Xining 810001, Qinghai, China;Chengdu University of Information Technology, Chengdu 610225, Sichuan, China;laboratory of cold recovery ecology of Qinghai province, Northwest Plateau Institute of biology, Chinese Academy of Sciences, Xining 810001, Qinghai, China

Received date: 2017-08-31

  Online published: 2018-08-28

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Abstract

The data of 30 mins snow depth and air temperature in winter half year during 2013 to 2014 derived from the field automatic observing site in the hinterland of the Sanjiangyuan Region in Qinghai-Tibetan Plateau were used in this study. We mainly analyzed the relationship between snow depth and air temperature in the time level of half hour based on one long snow melting period with 16 days in this area from 21 February to 1 March in 2014. The melting process of snow in this area is characterized by slow first and fast later. It was found that snow melting is slow while snow depth above on 10 cm, but it was changed obviously when snow depth is less than 10 cm and snow depth melting will more remarkable along with more low snow depth. During the snowmelt period, the snow depth drops rapidly at 10:00 (Beijing time, the same as after) -11:00 and 14:00-15:30. In this area, the relationship between snow depth and air temperature show a weak correlation before 9:00, the correlation becomes obvious after 9:00 and it is gradually stronger after 10:00 until 18:00. The time from 13:00 to 14:00 is a main period contribute to snow melt in a day. The advance lag analysis showed that the temperature within 240 mins before the melting period would significantly influence the change of snow depth. We found that the decrease of snow depth can be observed even though at -12℃ in this area.

Key words： Sanjiangyuan; snow; snow melting; temperature

Cite this article

ZHANG Juan , XU Weixin , WANG Li , ZHOU Huakun . Dynamic Snow Melting Process and Its Relationship with Air Temperature in the Hinterland of Sanjiangyuan Region in Qinghai-Tibetan Plateau[J]. Plateau Meteorology, 2018 , 37(4) : 936 -945 . DOI: 10.7522/j.issn.1000-0534.2018.00001

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