Temperature cross-section features in an urban area

J. Unger, Zoltán Sümeghy, Judit Zoboki

Research output: Contribution to journalArticle

88 Citations (Scopus)

Abstract

This study examines the connection between the built-up urban surface and near-surface air temperature. The studied city (Szeged, Hungary) is located on a low and flat flood plain with a population of 160,000. Data were collected by mobile measurements under different weather conditions between March 1999 and February 2000. The efforts have been focussed on investigating the maximum development of the urban heat island (UHI) along an urban cross-section. According to the results, the UHI intensity changed according to season and month, as a consequence of the prevailing weather conditions. The role of cloudiness and wind speed on the temporal variation of the largest UHI, which represents the increasing effect of Szeged on temperature, is clearly recognized during most of the time in the studied period. The seasonal profiles follow remarkably well the general cross-section of the typical UHI described by Oke (Oke, T.R., 1987. Boundary Layer Climates. Routledge, London) who defines its characteristic parts as 'cliff', 'plateau' and 'peak'. The usefulness of the normalized values in the investigation is proved, the form of the seasonal mean UHI profile is independent of the seasonal climatological conditions, and is determined to a high degree by urban surface factors. As a conclusion, we suggest a modified model describing the metropolitan temperature variable for cities situated in simple geographical conditions: It is equal to the sum of components of the basic climate of the region and of the production of urbanization at the surface, where this last term is a multiplication of weather and urban surface factors.

Original languageEnglish
Pages (from-to)117-127
Number of pages11
JournalAtmospheric Research
Volume58
Issue number2
DOIs
Publication statusPublished - 2001

Fingerprint

heat island
urban area
cross section
temperature
climate
cliff
cloud cover
urbanization
temporal variation
surface temperature
air temperature
boundary layer
wind velocity
plateau
weather
city
weather condition

Keywords

  • Climatological parameters
  • Cross-section
  • Land-use features
  • Mobile measurements
  • Urban heat island

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

Temperature cross-section features in an urban area. / Unger, J.; Sümeghy, Zoltán; Zoboki, Judit.

In: Atmospheric Research, Vol. 58, No. 2, 2001, p. 117-127.

Research output: Contribution to journalArticle

Unger, J. ; Sümeghy, Zoltán ; Zoboki, Judit. / Temperature cross-section features in an urban area. In: Atmospheric Research. 2001 ; Vol. 58, No. 2. pp. 117-127.
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