RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2016, Vol. 25 >> Issue (04): 599-605.doi: 10.11870/cjlyzyyhj201604009

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A STUDY ON THE CHARACTERISTICS OF CLIMATE CHANGE AROUND THE ERHAI AREA, CHINA

DING Wen-rong   

  1. College of Tourism and Geography Science, Yunnan Normal University, Kunming 650500, China
  • Received:2015-08-03 Revised:2015-11-25 Online:2016-04-20
  • Supported by:
    National Natural Science Foundation of China (On Spatial Evolution Mechanism and Its Optimization of Rural Settlement in Erhai Lake Ring Area in Yunnan (41261044); National Natural Science Foundation of China (Research on the hydrological process response to climate change and LUCC in a typical dry valley of Hengduan Mountain (41101099); Social development science and technology project of Yunnan Province (Study on the background of the geographical environment system of the mountain areaurban in Yunnan. NO: (2012CA024); Key projects of Education Department of Yunnan Province (Study on the water and sediment transportation mechanism in Longchuanjiang basin of Jinsha River. NO: (2015Z056)

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Abstract: Around the Erhai region in Yunnan province as multiple composite characteristics of typical area, have plateau lakes ecologically fragile area, ethnic culture diversity area and rural economic development active region at the same time, and it is also a vulnerable area of climate change. The annual average temperature, extreme maximum temperature and extreme minimum temperature, precipitation, maximum daily precipitation and precipitation days over 0.1mm of six stations around the Erhai lake area from 1951 to 2014 data as the foundation data are adopted. By linear trend estimation, Mann-Kendall trend test, Morlet wavelet analysis and R/S analysis method, climate change law was studied. It showing that: since 1951, the annual temperature and extreme minimum temperature were showed a rising trend, while extreme maximum temperature showed reducing trends, the change rate were 0.07/10a, 0.03/10a and 0.14/10a, respectively. The annual precipitation, maximum daily precipitation and precipitation days, are reduced trend, the rate is 12.85mm/10a and 1.73days/10a respectively. Annual average temperature, extreme high and extreme low temperature changes were not mutate, annual precipitation and precipitation days in 2010 there was a mutation decrease, while the maximum daily precipitation detected no year of mutation; Around the Erhai lake regional annual average temperature and annual precipitation have long time scales of the most significant cyclical change, with 30 years and 33 years respectively; and throughout the study period, local characteristics of periodic change of the short time scale is outstanding. From the point of future evolution trend, the annual average temperature and extreme minimum temperature will keep warming trend, while the extreme maximum temperature will continue to reduce, and continue reduce trend to increase trend of annual precipitation probability is smaller, while the probability of both the maximum daily precipitation and precipitation days will continue reduce trend are significant.

Key words: Climate change, temperature, precipitation, around Erhai area

CLC Number: 

  • P463.1
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