NDLI: Simulation of mixing depths incorporating the urban heat island effect

Content Provider	Springer Nature Link
Author	Khan, Suhail M. Simpson, Rod W.
Copyright Year	2001
Abstract	The main objective of this paper was to establish the effect of anthropogenic heat flux on the formation of mixing depth specially in urban areas. In this study an energy balance mixing depth model was developed for the simulation of mixing depth incorporating the heat island effect. To demonstrate the effect of heat island, mixing depths were simulated under two conditions. Under the first condition, hourly gridded anthropogenic heat flux and variant surface characteristics were considered, while under the second condition anthropogenic heat flux term was ignored and constant surface characteristics were considered throughout the modelling domain. The release of anthropogenic heat flux in the urban environment was found to be responsible for the growth of the unstable layer in the lower atmosphere even during the night. This resulted in higher mixing depth values in urban areas compared to the surrounding countryside. The maximum differential surfaces sensible heat flux between urban and rural areas was estimated as 130 W/m2. From the simulation of mixing depth, it was revealed that the maximum increment in mixing depth in urban areas was 300 m due to the heat island effect. This increment in mixing depth in urban areas can provide an extra space for dilution and mixing of pollutants.
Starting Page	183
Ending Page	193
Page Count	11
File Format	PDF
ISSN	14202026
Journal	Environmental Modeling & Assessment
Volume Number	6
Issue Number	3
e-ISSN	15732967
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2001-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Applications of Mathematics Mathematical Modeling and Industrial Mathematics Environment
Content Type	Text
Resource Type	Article
Subject	Environmental Science

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