Impact of heat storage on remote-sensing based quantification of anthropogenic heat in urban environments

REMOTE SENSING OF ENVIRONMENT

卷:262

Article

Yu, Zhou¹  Hu, Leiqiu²  Sun, Ting³  Albertson, John¹  Li, Qi¹ 

[1] Cornell Univ, Sch Civil & Environm Engn, Ithaca, NY 14850 USA

[2] Univ Alabama, Dept Atmospher & Earth Sci, Huntsville, AL 35899 USA

[3] Univ Reading, Dept Meteorol, Reading, Berks, England

关键词: Anthropogenic heat flux;    Surface energy balance;    Heat storage;   

DOI  :  10.1016/j.rse.2021.112520

来源: Elsevier

【 摘 要 】

Anthropogenic heat (AH) significantly impacts urban climates. Although combining the surface energy balance (SEB) with remote sensing data (RS-SEB) is promising for AH quantification, it has been shown to yield paradoxical low AH values in urban centers. Some speculation on the causes for the underestimation has appeared in the literature; however, none has been verified or thoroughly evaluated, largely hindering the further improvement of spatial representation of AH estimated through the RS-SEB approach. Here by casting the difference in the SEB between the observed reference state and a hypothetical scenario without AH, we developed a thermal stability analysis framework to identify the primary causes. Using AH estimations from six representative US cities based on Local Climate Zone (LCZ), we find that the reduced efficiency of the pathway from AH to sensible heat flux near high-rise buildings results in greater heat storage, which is a primary contributor to the underestimation. This study highlights the importance of heat storage in AH quantification using remote sensing data and provides evidence for potentially correcting the bias in AH with improved heat storage modeling.

【 授权许可】

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