Time Evolution of the Surface Urban Heat Island

Abstract Atmospheric and surface urban heat islands (UHI) originate from common energetic processes, but the status of scientific knowledge on their time evolution is highly disparate. The diurnal cycles of atmospheric UHI are well known based on years of continuous measurements in cities; the cycle...

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Autores principales:	I. D. Stewart, E. S. Krayenhoff, J. A. Voogt, J. A. Lachapelle, M. A. Allen, A. M. Broadbent
Formato:	article
Lenguaje:	EN
Publicado:	American Geophysical Union (AGU) 2021
Materias:	urban heat island diurnal temperature cycle urban climate models thermal remote sensing Environmental sciences GE1-350 Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/9ea4107428b6404599432abff8981a5d
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spelling	oai:doaj.org-article:9ea4107428b6404599432abff8981a5d2021-11-23T22:36:10ZTime Evolution of the Surface Urban Heat Island2328-427710.1029/2021EF002178https://doaj.org/article/9ea4107428b6404599432abff8981a5d2021-10-01T00:00:00Zhttps://doi.org/10.1029/2021EF002178https://doaj.org/toc/2328-4277Abstract Atmospheric and surface urban heat islands (UHI) originate from common energetic processes, but the status of scientific knowledge on their time evolution is highly disparate. The diurnal cycles of atmospheric UHI are well known based on years of continuous measurements in cities; the cycles of surface UHI, however, cannot be measured continuously or in situ. In this article, we aim to reconcile these differences. We begin with a synthesis of previous work on the diurnal evolution of surface UHI, which leads to a novel but historically minded approach to the research problem. The approach involves a combination of microscale and mesoscale urban climate models, each of which is forced with universally described urban and rural surface parameters and atmospheric profiles. With these models, we produce theoretical time‐temperature curves for the surface UHI that are comparable to the classic curves of atmospheric UHI. This work prompts a critical look at the use of satellite thermal imagery to assess heat islands and heat risks in cities. To that end, we recommend new and more functional definitions of surface temperature. Conceptually, these represent “incomplete” temperatures defined by specific facets of the urban environment.I. D. StewartE. S. KrayenhoffJ. A. VoogtJ. A. LachapelleM. A. AllenA. M. BroadbentAmerican Geophysical Union (AGU)articleurban heat islanddiurnal temperature cycleurban climate modelsthermal remote sensingEnvironmental sciencesGE1-350EcologyQH540-549.5ENEarth's Future, Vol 9, Iss 10, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	urban heat island diurnal temperature cycle urban climate models thermal remote sensing Environmental sciences GE1-350 Ecology QH540-549.5
spellingShingle	urban heat island diurnal temperature cycle urban climate models thermal remote sensing Environmental sciences GE1-350 Ecology QH540-549.5 I. D. Stewart E. S. Krayenhoff J. A. Voogt J. A. Lachapelle M. A. Allen A. M. Broadbent Time Evolution of the Surface Urban Heat Island
description	Abstract Atmospheric and surface urban heat islands (UHI) originate from common energetic processes, but the status of scientific knowledge on their time evolution is highly disparate. The diurnal cycles of atmospheric UHI are well known based on years of continuous measurements in cities; the cycles of surface UHI, however, cannot be measured continuously or in situ. In this article, we aim to reconcile these differences. We begin with a synthesis of previous work on the diurnal evolution of surface UHI, which leads to a novel but historically minded approach to the research problem. The approach involves a combination of microscale and mesoscale urban climate models, each of which is forced with universally described urban and rural surface parameters and atmospheric profiles. With these models, we produce theoretical time‐temperature curves for the surface UHI that are comparable to the classic curves of atmospheric UHI. This work prompts a critical look at the use of satellite thermal imagery to assess heat islands and heat risks in cities. To that end, we recommend new and more functional definitions of surface temperature. Conceptually, these represent “incomplete” temperatures defined by specific facets of the urban environment.
format	article
author	I. D. Stewart E. S. Krayenhoff J. A. Voogt J. A. Lachapelle M. A. Allen A. M. Broadbent
author_facet	I. D. Stewart E. S. Krayenhoff J. A. Voogt J. A. Lachapelle M. A. Allen A. M. Broadbent
author_sort	I. D. Stewart
title	Time Evolution of the Surface Urban Heat Island
title_short	Time Evolution of the Surface Urban Heat Island
title_full	Time Evolution of the Surface Urban Heat Island
title_fullStr	Time Evolution of the Surface Urban Heat Island
title_full_unstemmed	Time Evolution of the Surface Urban Heat Island
title_sort	time evolution of the surface urban heat island
publisher	American Geophysical Union (AGU)
publishDate	2021
url	https://doaj.org/article/9ea4107428b6404599432abff8981a5d
work_keys_str_mv	AT idstewart timeevolutionofthesurfaceurbanheatisland AT eskrayenhoff timeevolutionofthesurfaceurbanheatisland AT javoogt timeevolutionofthesurfaceurbanheatisland AT jalachapelle timeevolutionofthesurfaceurbanheatisland AT maallen timeevolutionofthesurfaceurbanheatisland AT ambroadbent timeevolutionofthesurfaceurbanheatisland
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Time Evolution of the Surface Urban Heat Island

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