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Int. J. Environ. Res. Public Health 2015, 12(8), 8773-8789; doi:10.3390/ijerph120808773

The Effect of Urban Heat Island on Climate Warming in the Yangtze River Delta Urban Agglomeration in China

1,2,* and 1,2,*
1
College of Geography Sciences, Nanjing Normal University, Wenyuan Road, Xianlin University District, Nanjing, 210023, China
2
Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210046, China
*
Authors to whom correspondence should be addressed.
Academic Editor: John Ulhoi
Received: 25 June 2015 / Revised: 17 July 2015 / Accepted: 20 July 2015 / Published: 27 July 2015
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Abstract

The Yangtze River Delta (YRD) has experienced rapid urbanization and dramatic economic development since 1978 and the Yangtze River Delta urban agglomeration (YRDUA) has been one of the three largest urban agglomerations in China. We present evidence of a significant urban heat island (UHI) effect on climate warming based on an analysis of the impacts of the urbanization rate, urban population, and land use changes on the warming rate of the daily average, minimal (nighttime) and maximal (daytime) air temperature in the YRDUA using 41 meteorological stations observation data. The effect of the UHI on climate warming shows a large spatial variability. The average warming rates of average air temperature of huge cities, megalopolises, large cities, medium-sized cities, and small cities are 0.483, 0.314 ± 0.030, 0.282 ± 0.042, 0.225 ± 0.044 and 0.179 ± 0.046 °C/decade during the period of 1957–2013, respectively. The average warming rates of huge cities and megalopolises are significantly higher than those of medium-sized cities and small cities, indicating that the UHI has a significant effect on climate warming (t-test, p < 0.05). Significantly positive correlations are found between the urbanization rate, population, built-up area and warming rate of average air temperature (p < 0.001). The average warming rate of average air temperature attributable to urbanization is 0.124 ± 0.074 °C/decade in the YRDUA. Urbanization has a measurable effect on the observed climate warming in the YRD aggravating the global climate warming. View Full-Text
Keywords: urban heat island; warming rate; urban agglomeration; Yangtze River Delta; urbanization rate; population; built-up areas urban heat island; warming rate; urban agglomeration; Yangtze River Delta; urbanization rate; population; built-up areas
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Huang, Q.; Lu, Y. The Effect of Urban Heat Island on Climate Warming in the Yangtze River Delta Urban Agglomeration in China. Int. J. Environ. Res. Public Health 2015, 12, 8773-8789.

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