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

Huang Q, Lu Y - Int J Environ Res Public Health (2015)

Bottom Line: 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).Urbanization has a measurable effect on the observed climate warming in the YRD aggravating the global climate warming.

View Article: PubMed Central - PubMed

Affiliation: College of Geography Sciences, Nanjing Normal University, Wenyuan Road, Xianlin University District, Nanjing, 210023, China. flyingfangzi@163.com.

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.

No MeSH data available.


Related in: MedlinePlus

Significant linear relationship between the warming rates of average, minimal (a) and maximal (b) air temperature in in the YRDUA.
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ijerph-12-08773-f002: Significant linear relationship between the warming rates of average, minimal (a) and maximal (b) air temperature in in the YRDUA.

Mentions: In this study, the warming rates of minimal and maximal air temperature were significantly correlated to that of average air temperature (Figure 2). In order to focus the aim of assessing the factors that affect the warming rate and differentiating the UHI contributions to the warming rate, we will pay our emphasis on the warming rate of average air temperature in the following results and discussion. A more detailed investigation for the interpretation of the difference of the warming rate of nighttime and daytime will be presented in the future study, which actually reflects the different mechanisms that determine nighttime and daytime UHI in the city.


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

Huang Q, Lu Y - Int J Environ Res Public Health (2015)

Significant linear relationship between the warming rates of average, minimal (a) and maximal (b) air temperature in in the YRDUA.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4555247&req=5

ijerph-12-08773-f002: Significant linear relationship between the warming rates of average, minimal (a) and maximal (b) air temperature in in the YRDUA.
Mentions: In this study, the warming rates of minimal and maximal air temperature were significantly correlated to that of average air temperature (Figure 2). In order to focus the aim of assessing the factors that affect the warming rate and differentiating the UHI contributions to the warming rate, we will pay our emphasis on the warming rate of average air temperature in the following results and discussion. A more detailed investigation for the interpretation of the difference of the warming rate of nighttime and daytime will be presented in the future study, which actually reflects the different mechanisms that determine nighttime and daytime UHI in the city.

Bottom Line: 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).Urbanization has a measurable effect on the observed climate warming in the YRD aggravating the global climate warming.

View Article: PubMed Central - PubMed

Affiliation: College of Geography Sciences, Nanjing Normal University, Wenyuan Road, Xianlin University District, Nanjing, 210023, China. flyingfangzi@163.com.

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.

No MeSH data available.


Related in: MedlinePlus