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The spatial distribution of global urban heat island intensity and the influence of urban sprawl

机译：全球城市热岛强度的空间分布及城市扩张的影响

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With significant urbanization effects, the urban heat island effect has been reported in many cities. There are many related researches on urban heat island effect in a single city or urban agglomeration. In this paper, MODIS land surface temperature products, maps of global urban extent, gross domestic product, and population data were used to analyze the relationship between urban heat island intensity and urban sprawl factors. The results showed that: ➀ the distribution of global urban heat island intensity existed obviously spatial heterogeneity, and the dominant impact factor of urban sprawl on urban heat island intensity in different regions was different. ➁ Urban heat island intensity mainly were related to the human activities (gross domestic product and population), while the impact of urban shape characteristics (urban area and urban shape index) were limited. Therefore, to a certain extent it may be possible to keep the urban heat island intensity down under well-organized urban sprawling. ➂ Urban heat island intensity could not be fully explained by urban sprawl factors only, other factors such as climatic factors still played an important role.
机译：由于城市化效应显着，许多城市都报告了城市热岛效应。有关单个城市或城市群中城市热岛效应的研究很多。本文使用MODIS地表温度产品，全球城市范围图，国内生产总值和人口数据来分析城市热岛强度与城市蔓延因子之间的关系。结果表明：➀全球城市热岛强度分布存在明显的空间异质性，不同地区城市扩张对城市热岛强度的主导影响因子也不同。 ➁城市热岛强度主要与人类活动（国内生产总值和人口）有关，而城市形态特征（城市面积和城市形态指数）的影响有限。因此，在组织得井井有条的城市蔓延下，一定程度上可以降低城市的热岛强度。 ➂仅城市扩张因素不能完全解释城市热岛强度，气候因素等其他因素仍然起着重要作用。

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