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Empirical modeling and spatio-temporal patterns of urban evapotranspiration for the Phoenix metropolitan area, Arizona

机译:亚利桑那州凤凰城大都市地区城市蒸散量的经验模型和时空分布

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摘要

In this study, an empirical model for predicting urban evapotranspiration (ET) is examined for the Phoenix metropolitan area that is in a subtropical desert climate using in situ ET measurements from a local flux tower and remotely sensed moderate-resolution imaging spectroradiometer land products. Annual ET maps of Phoenix are then created for the period from 2001 to 2015 using the empirical model developed. A time-series trend analysis is finally performed using predicted ET maps to discover the spatio-temporal patterns of ET changes during the study period. Results suggest that blue-sky albedo and land surface temperature are two statistically significant variables explanatory to model urban ET for Phoenix. Areas that have experienced significant increases of ET are highly spatially clustered, and are mainly found on the outskirts of the city, while areas of decreasing ET are generally associated with highly developed areas, such as downtown Phoenix.
机译:在这项研究中,使用来自本地通量塔的原位ET测量和遥感中分辨率成像分光辐射计土地产品,对亚热带沙漠气候下的凤凰城大都市地区的城市蒸发蒸腾(ET)的经验模型进行了检验。然后,使用开发的经验模型创建2001年至2015年期间的Phoenix年度ET图。最后使用预测的ET映射图进行时间序列趋势分析,以发现研究期间ET变化的时空模式。结果表明,蓝天的反照率和地表温度是两个统计上显着的变量,可以解释凤凰城的城市ET。 ET显着增加的区域在空间上高度聚集,并且主要分布在城市的郊区,而ET减小的区域通常与高度发达的地区相关联,例如凤凰城。

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