城市化对云南高原楚雄市近年来城市热岛效应影响研究

Abstract

Abstract: Although many studies have been done on urban heat island effect in many metropolis such as Beijing, Shanghai,Lanzhou,Urumqi,and Kunming City,the weather stations which are used to make comparison between cities and suburbs are few,the urban heat island effect research is also few in medium-sized cities of Yunnan plateau. In recent years,with the development of Chinese economy,the topic "urban development impact on regional climate and environment" gets lots of attentions in some remote and ecologically fragile areas. Located in the central of Yunnan Plateau and belong to South Asian monsoon climate,Chuxiong City suffered frequently the meteorological disasters recently,making it rather important to study the influence of urbanization on regional climate in Chuxiong City. Since more weather stations were established in Chuxiong City and its suburb after 2010,the reliability of data was improved. Based on the measured data and statistical data from 10 weather stations of Chuxiong City Bureau of Meteorology in recent five years,this paper analyzed the spatial and temporal distribution characteristics and influencing mechanism of the intensity of heat island in Chuxiong City. Results show that at time scale,the intensity of heat island in Chuxiong increased first and then soon decreased in recent years;the maximum intensity of heat island appeared in 2010(1.8℃),and the minimum intensity of heat island appeared in 2013(1.2℃);during a year,the intensity of heat island showed the trend Spring(2.0) > Winter (1.9) > Autumn(1.5℃) > Summer(1.0℃),with the maximum intensity of heat island appeared in March (2.6℃),and the minimum intensity of heat island appeared in August(0.9℃);in a day,the maximum intensity of heat island appeared in 02 a.m.(2.0℃),and the minimum intensity of heat island appeared in 14 p.m. (-0.3℃). At spatial scale,the center of urban heat island intensity was also the center of Chuxiong City,and presented outward diminishing trend,which showed high correlations with topography and land-use situation of Chuxiong City. The most important natural factor that influences the intensity of heat island was wind speed; evaporation,cloud cover and precipitation were the secondary important natural factors;the most important human factor that influences the intensity of heat island was energy consumption;built-up urban area and smoke&dust emissions were the secondary important human factors. The conclusions will make important scientific contributions to the study of regional climate effect on city development in Yunnan plateau,and also the urban disaster prevention and reduction and sustainable development.

Key words: Chuxiong City, urban heat island effect, temperature, grey relational analysis, urban development

CLC Number:

HE Ping, LI Jinxiao, YI Yong-zheng, ZHANG Qing-yan, LIU Shu-hua. Influence research of urbanization on urban heat island effect in Chuxiong city on Yunnan Plateau in recent years[J]., 2016, 39(4): 687-694.

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Influence research of urbanization on urban heat island effect in Chuxiong city on Yunnan Plateau in recent years

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