Climate Change Research ›› 2018, Vol. 14 ›› Issue (2): 137-143.doi: 10.12006/j.issn.1673-1719.2017.088

• Changes in Climate System • Previous Articles     Next Articles

Spatio-temporal changes of snow phenology in the Qinghai-Tibetan Plateau during the hydrological year of 1980-2009

De-Jing QIAO1,2(), Nian-Qin WANG1, Zhen LI2, Jian-Min ZHOU2, Xi-You FU2   

  1. 1 College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China;
    2 Laboratory of Digital Earth Sciences, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100094, China;
  • Received:2017-05-05 Revised:2017-07-25 Online:2018-03-30 Published:2018-03-30


Taking the Qinghai-Tibetan Plateau as the object of study, based on the daily dataset of snow depth from 1980 to 2009, the mean snow depth, snow cover start (SCS) and snow cover end (SCE) dates were calculated for each hydrological year, and the spatial and temporal variations and distribution anomaly of them were analyzed by using the spatial and statistics analysis function of GIS. The results showed that, mean snow depth decreased during the period of 1980-1989, and started to increase from the 1990s. In the 1980s, the SCS showed a significantly advanced trend, which mainly occurred in the high altitude region of the Qinghai-Tibetan Plateau except the Altun Mountains and Kunlun Mountains. The SCE showed a significantly delay, occurred in the high altitude region. In the 1990s, the advanced trend of SCS in the high altitude region showed a slightly delayed trend, but the SCS in the central plateau hinterland showed a significantly advanced trend. The SCE in the high altitude region became weak. And the SCE in the central plateau hinterland showed a delayed trend. In the beginning of the 21st century, the SCS in the Pamir Plateau, Nyainqentanglula Mountains and Transverse Mountains showed a significantly delay trend. The SCE in the Hengduan Mountain, Nianqing Tanggula and Bayan Hara Mountain showed a significantly advanced trend. Generally, the snow phenology showed different spatial patterns and evolution trends in different regions.

Key words: Qinghai-Tibetan Plateau, Snow depth, Snow phenology variability, Passive microwave

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