According to the results of hot–cold spot analysis, the hot spot areas showed a trend of shrinking–transferring–diffusing during three periods (1999–2006, 2006–2014, and 2014–2019), and Weiyang District in northwest Xi’an showed an obvious trend of cold to hot in the past 20 years ( Figure 4 ).
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Cooling Effect of Green Space and Water on Urban Heat Island and the Perception of Residents: A Case Study of Xi'an City.
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Additionally, the scores for the cooling effect of green space (1.90–3.72) and water (1.79–3.60) showed an increasing trend.
It was found that the proportions of HTA and SHTA in Beilin, Lianhu, Xincheng, Baqiao, and Yanta Districts showed a decreasing trend, which was directly reflected by the optimistic attitude of most respondents to the cooling effect of urban parks.