Abstracts for the 5th International GAME Conf.
3-5 October 2001
Aichi Trade Center
Nagoya Japan
A Preliminary Analysis of the Heavy Snow and the Ground Temperature Anomaly in Northern Tibetan Plateau
Meixue YANG (1), Tandong YAO (1), Toshio KOIKE (3), Katsunory TAMAGAWA (3), Yuanqing HE (1)
(1) Laboratory of Ice Core and Cold Region Environment, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, China
(3) University of Tokyo, Japan
The GAME-Tibet project, which has been carried out by the joint team of Chinese and Japanese scientists, started in 1996. The POP experiment has been conducted during July to September 1997. In this period, the soil moisture and soil temperature measurement systems (SMTMS) and automation weather stations (AWS) had been installed at different sites on the northern part of Tibetan Plateau. Because the very severe snow disaster occurred in Amduo-Naqu region in winter 1997-1998, enormous sheep and yaks were died due to the starvation and coldness. Such strict situation has brought too many difficulties to the local resident. Some observation sites of GAME-Tibet are located within the above area. In this paper, based on the GAME-Tibet in-situ observation data at different sites, the anomaly variation of the ground temperature on the northern part of Tibetan Plateau and its relationship with the heavy snow cover has been preliminary analyzed.
The results showed that significant differences in temporal and spatial of the variations of the ground daily maximum temperature, daily minimum temperature and the daily range of the ground temperature were existed from the winter season in 1997-1998 at northern part of the Tibetan Plateau. Especially at site D110, the daily range of the ground temperature just fluctuated within 0.2(C from the end December 1997 to the middle April 1998. But in its north, at site D66, the daily range of the ground temperature fluctuated within 5(C(20(C at the same depth and same period. At the south most site MS3637, the daily range of the ground temperature fluctuated within 1.0(C from the middle November to the early February. From the middle February to the middle March, the daily range of the ground temperature increased. The highest could reach to 8.1(C. Comparing the snow depth estimated from AMSR and ground temperature showed that the temperature anomaly was related to the heavy snow occurred in northern Tibetan Plateau in winter, 1997. According to the anomaly variation of the ground temperature in shallow layer, the snow cover condition in different sites of northern Tibetan Plateau could be evaluated quantitatively.
Submittal Information
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Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, China. | |
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Donggang West Road 260, Lanzhou 730000, China | |
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