Resources Science ›› 2016, Vol. 38 ›› Issue (6): 1160-1168.doi: 10.18402/resci.2016.06.15

• Orginal Article • Previous Articles     Next Articles

Change in snow coverage and responses to climate change from 2001 to 2013 in the upper reaches of Kaidu River Basin

LI Fei(), LIU Miaomiao, WANG Shuixian()   

  1. Key Laboratory of Western China's Environmental Systems (Ministry of Education),College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China
  • Received:2015-11-12 Revised:2016-03-12 Online:2016-06-20 Published:2016-06-18

Abstract:

Based on precipitation and temperature data for the upper reaches of the Kaidu River Basin from 1958 to 2013 and MODIS (Moderate-resolution Imaging Spectroradiometer)snow product data MOD10A2 from 2001 to 2013,we investigated snow coverage dynamics and trends in different seasons and regions using linear regression analysis and non-parametric Mann-Kendall tests from 2001 to 2013. Trends in climate change between precipitation and temperature were analyzed over the past 50 years and correlation analysis between precipitation,temperature and snow coverage data was conducted. We found that all elevation zones show decreasing trends,except for B (2000~2900 m)for which the increasing trend was the main focus. In the whole study zone and all elevation zones except for D (3800~4794m),changes in snow coverage are common single-peak curves in the whole year. The maximum value for snow coverage occurred in winter and the minimum in summer. However,D shows a double-peak curve. Its peak occurred in November and April,and the valley occurred in February. The increasing trend is significant and obvious for annual snow coverage of B in autumn. For other elevation zones,a decreasing trend is dominant. There is a central trend from A (1098~2000m),C (2900~3800m)and D to B. Obvious correlations between snow coverage and precipitation in winter and temperature in spring are clear. There may be an increasing run-off and flood frequency in spring.

Key words: upper reaches of the Kaidu River basin, snow coverage, MODIS, temperature, precipitation, spatial and temporal distribution, climate change