1. bookVolume 23 (2015): Issue 3 (September 2015)
Journal Details
License
Format
Journal
eISSN
2199-6202
First Published
30 Jul 2013
Publication timeframe
4 times per year
Languages
English
access type Open Access

The spatial variability of air temperature and nocturnal urban heat island intensity in the city of Brno, Czech Republic

Published Online: 29 Oct 2015
Volume & Issue: Volume 23 (2015) - Issue 3 (September 2015)
Page range: 8 - 16
Received: 18 Nov 2014
Accepted: 13 May 2015
Journal Details
License
Format
Journal
eISSN
2199-6202
First Published
30 Jul 2013
Publication timeframe
4 times per year
Languages
English
Abstract

This study seeks to quantify the effects of a number of factors on the nocturnal air temperature field in a medium-sized central European city located in complex terrain. The main data sources consist of mobile air temperature measurements and a geographical database. Temperature measurements were taken along several profiles through the city centre and were made under a clear sky with no advection. Altogether nine sets of detailed measurements, in all seasons, were assembled. Altitude, quantity of vegetation, density of buildings and the structure of the transportation (road) system were considered as explanatory variables. The result is that the normalized difference vegetation index (NDVI) and the density of buildings were the most important factors, each of them explaining a substantial part (more than 50%) of overall air temperature variability. Mobile measurements with NDVI values as a covariate were used for interpolation of air temperature for the entire study area. The spatial variability of nocturnal air temperature and UHI intensity in Brno is the main output presented. Air temperatures interpolated from mobile measurements and NDVI values indicate that the mean urban heat island (UHI) intensity in the early night in summer is at its highest (approximately 5 °C) in the city centre and decreases towards the suburban areas.

Keywords

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