JOURNAL OF NATURAL RESOURCES ›› 2015, Vol. 30 ›› Issue (6): 974-985.doi: 10.11849/zrzyxb.2015.06.008

• Resource Evaluation • Previous Articles     Next Articles

The Changing Trend of Heat Island Intensity and Main Influencing Factors during 1993-2012 in Xi'an City

LIU Yu-feng1, YUAN Zhi-hua1, KONG wei2, SUN bo1, AN bin3   

  1. 1. College of Tourism & Resources and Environment, Xianyang Normal University, Xianyang 712000, China;
    2. Law and Politics Department, Hebei North University, Zhangjiakou 075000, China;
    3. College of Tourism and Environment, Shaanxi Normal University, Xi'an 710062, China
  • Received:2014-07-07 Revised:2014-12-30 Online:2015-06-20 Published:2015-06-20

Abstract: The temperature data of the Xi'an city and the suburbs (Lintong, Changan) or counties (Lantian, Zhouzhi, Huxian, Gaoling) from 1993 to 2012 were used to analyze the annual change of heat island effect intensity in Xi'an city by the method of regression analysis, Mann- Kendall analysis, etc. At the same time, we use the Grey System theory to study the influence and contribution degree of urbanization such as the economic development and population growth on the heat island effect of Xi'an city. The results show that: 1) The temperature of Xi' an urban and suburb area have presented an increasing trend since 1993. The change of heat island intensity in Xi'an city has obvious periodic characteristics, and there was a break point between 2000 and 2001. 2) There is a close relationship between urbanization and urban heat island. The factors of heat island are highly interrelated to each other, which indicated that there is a strong transfer function among them. There exists obvious relationships between heat island intensity and various factors, especially the demographic factor which is an important indicator of the urbanization. In terms of the strength, density and scale, the population density effect is greater than the population size effect, the economic density effect is slightly larger than the economic scale effect, the energy intensity effect is greater than the energy scale effect. 3) The contribution of different influence factors on heat island intensity change exists obvious difference. The most contribution to heat island intensity change is from resident population, population density and urban built- up area, and the contribution of other factors is relatively small. 4) The simulating result of Grey Theory model has showed good consistence between the actual values and fitted values, and also showed that the heat island intensity of Xi'an city will increase in the next few years.

CLC Number: 

  • P463.3