Change of Urban Heat Island Intensity and Its Effect on Surface Mean Air Temperature Records in Southwest China

Tang Guoli; Ren Guoyu; Zhou Jiangxing

Vol.19, NO.6, 2008

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2008 > 19(6): 722-730

Tang Guoli, Ren Guoyu, Zhou Jiangxing. Change of urban heat island intensity and its effect on surface mean air temperature records in southwest China. J Appl Meteor Sci, 2008, 19(6): 722-730.

Citation:

Tang Guoli, Ren Guoyu, Zhou Jiangxing. Change of urban heat island intensity and its effect on surface mean air temperature records in southwest China. J Appl Meteor Sci, 2008, 19(6): 722-730.

Tang Guoli, Ren Guoyu, Zhou Jiangxing. Change of urban heat island intensity and its effect on surface mean air temperature records in southwest China. J Appl Meteor Sci, 2008, 19(6): 722-730.

Citation:

Tang Guoli, Ren Guoyu, Zhou Jiangxing. Change of urban heat island intensity and its effect on surface mean air temperature records in southwest China. J Appl Meteor Sci, 2008, 19(6): 722-730.

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Change of Urban Heat Island Intensity and Its Effect on Surface Mean Air Temperature Records in Southwest China

Laboratory for Climate Studies, National Climate Center, Beijing 100081

Received Date: 2008-02-18
Rev Recd Date: 2008-05-27
Publish Date: 2008-12-31

Abstract

Abstract

The surface air temperature records are obviously affected by the urbanization in China.The changes of the surface air temperature in Southwest China lag behind the countrywide changes, and air temperature records at some stations even show a dropping trend.It is important to understand the detailed features of surface air temperature change trends and the effect on them of urban development for different stations in that region.Using a data set of monthly mean temperature from 322 stations and corresponding population data, the surface air temperature change trends and the effect of urbanization development on mean surface air temperature records in towns and cities in Southwest China during 1961—2004 are analyzed.Quality control and inhomogeneity adjustment are made for air temperature data.On the basis of calculating air temperature change trends of towns and cities at national reference/baseline stations and rural stations, the extent and relative contribution proportion of urbanization effect are obtained by comparing the differences between the change trends of various stations and rural stations.Results show that there are warming trends of surface air temperature for each of the station groups.The warming rates in towns and cities, and national stations are greater than those in rural areas.In annual mean surface air temperature records in towns and cities, and national stations, urban warming rates are estimated as 0.086 ℃/10a and 0.052 ℃/10a respectively, and their contributions to overall annual mean temperature change are 57.6% and 45.3% respectively.Compared with the other regions in China, the warming rates of temperature and the urban warming rates in Southwest China are relatively low.Although the change of the average heat island intensity in this region is smaller than those in quite a number of regions in China, the contributions of urban warming to the overall mean temperature change trends are generally larger as a result of this feature.In addition, there are obvious season changes in urban warming rates, with the urban warming rates in autumn, spring or winter being the largest and second respectively, and that in summer the smallest. However, the largest contributions (100%) of urban warming to mean temperature in seasons are in spring, second to which are the contributions in summer of 73% and above.Those in autumn and winter are relatively smaller.
- Southwest China;
- surface air temperature;
- urban heat island effect;
- climate change

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References(30)

Figures and Tables

图 1 西南地区各类台站位置分布

Fig. 1 Location of meteorological stations in Southwest China

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图 2 1961-2004年西南地区平均气温变化趋势的空间分布（单位：℃/10a）

Fig. 2 Spatial distribution of mean temperature change rates over Southwest China from 1961 to 2004(unit:℃/10a)

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图 3 1961-2004年西南地区城市代表站与郊区站年平均气温距平随时间变化曲线

(粗线为城市站, 细线为郊区站, 虚线为线性趋势)

Fig. 3 Comparisons of annual mean temperature changes between urban stations and suburbs stations in the Southwest China for 1961-2004(thick lines:urban areas; thinlines :suburbs; dashed lines:linear trends)

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图 4 1961-2004年西南地区乡村站、小城市站、大中城市站和国家基准/基本站的年平均气温距平序列及变化趋势 (虚线为线性趋势)

Fig. 4 Annual mean temperature anomaly series and the trends of rural area, small city/town, big/middle city and reference/basic station over Southwest China for 1961-2004(dashed lines :linear trends)

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图 5 1961-2004年西南地区城市站和国家站平均气温序列热岛增温的逐月变化

Fig. 5 Monthly change of the urban warming rates of the area-averaged surface air temperature series over Southwest China for 1961-2004

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表 1 1961-2004年西南地区城市代表站与郊区站年平均气温增温对比

Table 1 Comparison of annual mean temperature warming rates between urban areas and suburbs in Southwest China for 1961-2004

表 2 1961-2004年西南地区各类气象台站平均气温变化速率及城市站与国家站热岛增温率和贡献率

Table 2 Trends of surface air temperature, the heat island warming rates of city station and reference/basic station and their contributions to mean temperature change in Southwest China for 1961-2004

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