Satellite Clear‐Sky Observations Overestimate Surface Urban Heat Islands in Humid Cities

Author:

Yang Qiquan123ORCID,Xu Yi1ORCID,Wen Dawei4,Hu Ting5,Chakraborty TC6,Liu Yue7,Yao Rui8,Chen Shurui2,Xiao Changjiang23ORCID,Yang Jie8

Affiliation:

1. State Key Laboratory of Lunar and Planetary Sciences Macau University of Science and Technology Macau China

2. College of Surveying & Geo‐Informatics Tongji University Shanghai China

3. The Shanghai Key Laboratory of Space Mapping and Remote Sensing for Planetary Exploration Tongji University Shanghai China

4. School of Computer Science and Engineering Hubei Key Laboratory of Intelligent Robot Wuhan Institute of Technology Wuhan China

5. School of Remote Sensing and Geomatics Engineering Nanjing University of Information Science and Technology Nanjing China

6. Pacific Northwest National Laboratory Richland WA USA

7. Guangzhou Institute of Geography Guangdong Academy of Sciences Guangzhou China

8. School of Remote Sensing and Information Engineering Wuhan University Wuhan China

Abstract

AbstractSatellite‐based thermal infrared (TIR) land surface temperature (LST) is hindered by cloud cover and is applicable solely under clear‐sky conditions for estimating surface urban heat island intensity (SUHII). Clear‐sky SUHII may not accurately represent all‐sky conditions, potentially introducing quantitative biases in assessing urban heat islands. However, the differences between clear‐sky and all‐sky SUHIIs and their spatiotemporal variations are still poorly understood. Our analysis of over 600 global cities demonstrates that clear‐sky SUHII is mostly higher than all‐sky SUHII, particularly in summer, daytime, and precipitation‐rich regions. Besides, clear‐sky SUHII typically exhibits stronger seasonal and diurnal contrasts than all‐sky SUHII, especially for cities located in humid regions. These discrepancies can be attributed mainly to the increased missing LST data caused by cloud enhancement in urban areas. Our findings highlight the tendency for clear‐sky observations to overestimate SUHII, providing valuable insights for standardizing the quantification of surface urban heat islands.

Publisher

American Geophysical Union (AGU)

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3