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Urban climate effects of artificial heat sources and ground shadowing by buildings
Author(s) -
Swaid Hanna
Publication year - 1993
Publication title -
international journal of climatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.58
H-Index - 166
eISSN - 1097-0088
pISSN - 0899-8418
DOI - 10.1002/joc.3370130707
Subject(s) - environmental science , urban heat island , canyon , mean radiant temperature , meteorology , roof , atmospheric sciences , air temperature , daytime , climatology , urban climate , climate change , heat flux , thermal , urbanization , geography , heat transfer , geology , mechanics , oceanography , physics , archaeology , cartography , economic growth , economics
Simulations are presented for the effects of artificial heat sources and ground shading by buildings on air temperature variations in the urban canopy layer. An idealized urban cluster composed of repeated street canyons oriented east‐west with an aspect ratio of 0.5 is used to evaluate these effects. The simulations by the cluster thermal time constant model show that a daily mean artificial heat flux of 11 Wm −2 causes an almost invariant temperature rise of 0.7 K around‐the‐clock. Conversely, increasing the shade area in the streets by means of vertical screens fitted at the building roof‐level can produce a pronounced temperature lowering at midday.
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