The energy budget of the urban surface: two locations in Dublin
Urban areas generate distinctive climates that are revealed in the statistics of wind, temperature, humidity and so on. These properties are the result of energy exchanges between the atmosphere and underlying urban surface, which is the focus of physical climatology studies. These exchanges form an energy budget (EB), which includes radiation exchanges (both solar and terrestrial), the turbulent fluxes of sensible and latent heat and the energy transferred to the substrate by conduction. An evaluation of these exchanges and their spatial variation is essential to explaining the effect that cities have on climate at all scales. However, observing these exchanges is difficult and requires both sensitive equipment and careful placement to ensure representative readings. This paper presents some initial results on the EB over two urban surfaces in Dublin, one a densely built urban site near the city centre and the other a mature, well vegetated, suburban site. The results demonstrate the effects of different urban surface features on surface-air exchanges. The objective hysteresis model is also employed to evaluate the energy balance residual. Results show good agreement between modelled and residual values. Although there have been studies on Dublin’s urban climate, most notably its urban heat island (UHI), there has been no prior study of the energetic processes responsible for this local climate change. This research programme, for which initial results are presented in this paper, is one of the few studies globally that will maintain long-term measurements (five years) of urban EBs.
How to Cite
LicenseAuthors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).