Abstract
The characteristics of urban heat island (UHI) circulation are analytically expressed as functions of the surface temperature in both temperature inversion and non-temperature inversion (NTI) profiles, in which the temperature declines with increasing altitudes. To identify how the inversion layer affects UHI circulation, two temperature profiles are specified to be nearly similar except within the temperature inversion layer. Theoretical calculations suggest that the UHI circulation in the temperature inversion case is weaker and lower than in the NTI case and that there is no significant difference between the two cases. When the inversion layer thickness is fixed, the relative size difference between the weakening inversion intensity and the strengthening temperature influence above the inversion lid controls the decrease or increase in UHI circulation.
Highlights
The well-known urban heat island (UHI) phenomenon is used to describe cities that are generally hotter than their rural surroundings
How is UHI circulation distributed in an surface temperature inversion (STI) case, and how does it differ from the circulation in an non-temperature inversion (NTI) case? we establish a known STI profile with a 100-m-thick inversion layer above the urban surface (Figure 1a, dashed line) to calculate the corresponding UHI circulation
This study aims to solve an analytic solution for UHI circulation in the temperature inversion
Summary
The well-known urban heat island (UHI) phenomenon is used to describe cities that are generally hotter than their rural surroundings. As a local heat source over urban surfaces, an UHI can drive corresponding thermal circulation patterns. UHI-induced circulation can be investigated through observational and numerical studies and theoretical analysis, in which the UHI is considered a thermal response of the low-level atmosphere to a specified surface or is represented by near-surface heating. Olfe and Lee [8] carried out steady, linearized flow calculations to estimate the vertical temperature profiles over a heated area representing a city. Kimura [9] investigated the effects of uniform flows on two-dimensional heat island convection by obtaining the steady solutions of the linearized vorticity and thermodynamic equations and discussed the calculations for non-viscous and neutral fluids. Lin and Smith [10]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
