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Atmosphere 2014, 5(4), 755-774; doi:10.3390/atmos5040755

Local Climate Classification and Dublin’s Urban Heat Island

1
Irish Climate Analysis & Research Units, Maynooth University Kildare, Ireland
2
School of Geography, Planning & Environmental Policy, University College Dublin, Dublin 4, Ireland
*
Author to whom correspondence should be addressed.
Received: 20 May 2014 / Revised: 10 September 2014 / Accepted: 19 September 2014 / Published: 21 October 2014
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Abstract

A recent re-evaluation of urban heat island (UHI) studies has suggested that the urban effect may be expressed more meaningfully as a difference between Local Climate Zones (LCZ), defined as areas with characteristic dimensions of between one and several kilometers that have distinct effects on climate at both micro-and local-scales (city streets to neighborhoods), rather than adopting the traditional method of comparing urban and rural air temperatures. This paper reports on a UHI study in Dublin (Ireland) which maps the urban area into LCZ and uses these as a basis for carrying out a UHI study. The LCZ map for Dublin is derived using a widely available land use/cover map as a basis. A small network of in-situ stations is deployed into different LCZ across Dublin and additional mobile temperature traverses carried out to examine the thermal characteristics of LCZ following mixed weather during a 1 week period in August 2010. The results show LCZ with high impervious/building coverage were on average >4 °C warmer at night than LCZ with high pervious/vegetated coverage during conditions conducive to strong UHI development. The distinction in mean LCZ nocturnal temperature allows for the generation of a heat map across the entire urban area. View Full-Text
Keywords: microclimatology; urban geography; urban heat island; local climate zones microclimatology; urban geography; urban heat island; local climate zones
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Alexander, P.J.; Mills, G. Local Climate Classification and Dublin’s Urban Heat Island. Atmosphere 2014, 5, 755-774.

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