JOURNAL OF NATURAL RESOURCES ›› 2012, Vol. 27 ›› Issue (11): 1962-1970.doi: 10.11849/zrzyxb.2012.11.015

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Remote Sensing Monitoring of the Qinghai Lake Based on EOS/MODIS Data in Recent 10 Years

LI Xiao-dong, XIAO Jian-she, LI Feng-xia, XIAO Rui-xiang, XU Wei-xin, WANG Li   

  1. Institute of Qinghai Meteorological Science Research, Xining 810001, China
  • Received:2011-10-10 Revised:2012-01-16 Online:2012-11-20 Published:2012-11-20

Abstract:

The meteorological and MODIS data in recent 10 years were used to analyze change of the area of water surface, water level, annual average temperature and annual rainfall, and reveal trend of the area of water surface of the Qinghai Lake. Results of the analysis of remote sensing monitoring data of the Qinghai Lake and climate factors around it showed that the annual average temperature increased significantly in recent 10 years, the average increase per year for the annual average temperature about 0.12℃. The annual rainfall showed an increasing trend in fluctuation. It is found that water level of the Qinghai Lake showed a continued declining trend in recent 50 years, but enhanced from 2001 to 2010 and the increasing trend was remarkable. The results indicated that area of water surface monitoring show significant increase in the Qinghai Lake from MODIS data in April and September in the past 10 years, and area of water surface was significantly correlated with water level,the correlation coefficients are 0.818 and 0.875 respectively(P<0.05). As a result of climate change, rainfall increased or climate changed wet in some areas of northern Qinghai. Because of warm-wet climate leading to rainfall increase, this may cause water level rising and such a trend of climate change made area of water surface enlarged in the nearly 10 years.

Key words: remote sensing monitoring, Qinghai Lake, area of water surface, water level

CLC Number: 

  • P332