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URBAN HEAT ISLAND EFFECT AND ITS CONTRIBUTION TO OBSERVED TEMPERATURE INCREASE AT WUHAN STATION, CENTRAL CHINA

Journal of Tropical Meteorology 2019年第1期25卷 102-113页

作者： JIA Wen-qian REN Guo-yu SUONAN Kan-zhuo ZHANG Pan-feng WEN Kang-min REN Yong-jian Department of Atmospheric Sciences China University of Geosciences Laboratory for Climate Studies China Meteorological Administration National Climate Center Wuhan Regional Climate Center

Based on an in-homogeneity adjusted dataset of the monthly mean temperature, minimum and maximum temperature, this paper analyzes the temporal characteristics of Urban Heat Island(UHI) intensity at Wuhan Station, and its impact on the long-term trend of surface air temperature change recorded during 1961-2015 by using an urban-rural method. Results show that UHI effect is obvious near Wuhan Station in the past 55 years, especially for minimum temperature. The strongest UHI intensity occurs in summer and the weakest in winter. For the period 1961-2004, UHI intensity undergoes a significant increase near the urban station, with the increase especially large for the period 1988-2004, but the last 10 years witness a significant decrease, with the decrease in minimum temperature being more significant than that of maximum temperature. The annual mean urban warming and its contribution to overall warming are 0.18 C/10 yr and 48.8% respectively for the period 1961-2015, with a more significant and larger urbanization effect seen in Tminthan Tmax. Thus, a large proportion warming, about half of the overall increase in annual mean temperature,as observed at the urban station, can be attributed to the rapid urbanization in the past half a century.

关键词： data in-homogeneity uhii urban warming climate change

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Geospatial Techniques, a Superlative Method to Assess Urban Heat Island Intensity: The Case of Abuja Municipal, Nigeria

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Journal of Geographic Information System 2021年第1期13卷 52-64页

作者： M. E. Awuh P. O. Japhets I. C. Enete Department of Geography & Planning University of Bamenda (UBa) Bamenda Cameroon Department of Geography & Meteorology Nnamdi Azikiwe University (NAU) Awka Nigeria

Most cities around the world, including Abuja Municipal are being faced with an undesirable increased in air temperature. This is indicated by an increase in non-porous, non-evaporating, highly thermal conductive surfaces such as concrete and asphalt, which has replaced the vegetation biomass resulting to the formation of urban heat island. There is an increasing need for studies on the changing trend of UHI intensity in cities. This research employed geospatial techniques to determine the urban heat island intensity in Abuja Municipal. Temperature characteristics over twenty selected rural and urban locations in Abuja, FCT were derived from the satellite image of 1986, 2001 and 2016 using the “Extract Multi Values to Point” tool in ArcGIS 10.4. These transects pass over various landscapes with different environmental settings, with the aim of understanding the factors shaping the city’s thermal landscape. The intervals of +15 years were deliberately chosen to ensure uniformity between the datasets. The results of this analysis indicate that uhii has been increasing, from 1986-2016, giving credence to the results of the spatial and temporal analysis of the land surface temperature, indicating the development phases had hit full stride. The different periods under study (1986, 2001 and 2016) were also tested using the student “t” test to determine the significant difference in the land surface temperature values to acknowledge the presence of a substantial urban heat island within the study area. The result reveals the calculated “t” values of 2.50, 3.34, 5.57 of 1986, 2001 and 2016 respectively, are higher than the critical value of “t” at 0.05 being 1.73, thus, revealing the temperature differences between the urban and rural stations to be highly significant, indicating the presence of a strong urban heat island. Also, a slide difference in the temperature was observed with the Rubuchi and Karmajiji rural areas having higher temperature readings than their counter

关键词： Geospatial Techniques Abuja Municipal uhii Superlative Method

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Urban Heat Island Effect and Its Contribution to Observed Temperature Increase at Wuhan Station,Central China

Urban Heat Island Effect and Its Contribution to Observed Te...

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第35届中国气象学会年会

作者： JIA Wen-qian REN Guo-yu SUONAN Kan-zhuo ZHANG Pan-feng WEN Kang-min REN Yong-jian Department of Atmospheric Sciences China University of Geosciences Laboratory for Climate Studies China Meteorological AdministrationNational Climate Center Wuhan Regional Climate Center

Based on an in-homogeneity adjusted dataset of the monthly mean temperature,minimum and maximum temperature,this paper analyzes the temporal characteristics of Urban Heat Island(UHI) intensity at Wuhan Station,and its impact on the long-term trend of surface air temperature change recorded during 1961-2015 by using an urban-rural *** show that UHI effect is obvious near Wuhan Station in the past 55 years,especially for minimum *** strongest UHI intensity occurs in summer and the weakest in *** the period 1961-2004,UHI intensity undergoes a significant increase near the urban station,with the increase especially large for the period 1988-2004,but a significant decrease is registered for the last 10 years,with the decrease in minimum temperature more significant than that of maximum *** annual mean urban warming and its contribution to overall warming are 0.18?C/10 yr and 48.8% respectively for the period 1961-2015,with a more significant and larger urbanization effect seen in Tmin than Tmax.A large proportion warming,about half of the overall increase in annual mean temperature,as observed at the urban station,thus can be attributed to the rapid urbanization in the past half a century.

关键词： Wuhan Data in-homogeneity uhii Urban warming Data bias Climate change

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