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| Titel |
Inclusion of vegetation in the Town Energy Balance model for modelling urban green areas |
| VerfasserIn |
A. Lemonsu, V. Masson, L. Shashua-Bar, E. Erell, D. Pearlmutter |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 5, no. 6 ; Nr. 5, no. 6 (2012-11-09), S.1377-1393 |
| Datensatznummer |
250002947
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| Publikation (Nr.) |
 copernicus.org/gmd-5-1377-2012.pdf |
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| Zusammenfassung |
| Cities impact both local climate, through urban heat islands and global
climate, because they are an area of heavy greenhouse gas release into the
atmosphere due to heating, air conditioning and traffic. Including more
vegetation into cities is a planning strategy having possible positive
impacts for both concerns. Improving vegetation representation into urban
models will allow us to address more accurately these questions. This paper
presents an improvement of the Town Energy Balance (TEB) urban canopy model.
Vegetation is directly included inside the canyon, allowing shadowing of
grass by buildings, better representation of urban canopy form and, a
priori, a more accurate simulation of canyon air microclimate. The surface
exchanges over vegetation are modelled with the well-known Interaction Soil
Biosphere Atmosphere (ISBA) model that is integrated in the TEB's code
architecture in order to account for interactions between natural and
built-up covers. The design of the code makes possible to plug and use any
vegetation scheme. Both versions of TEB are confronted to experimental data
issued from a field campaign conducted in Israel in 2007. Two semi-enclosed
courtyards arranged with bare soil or watered lawn were instrumented to
evaluate the impact of landscaping strategies on microclimatic variables and
evapotranspiration. For this case study, the new version of the model with integrated vegetation
performs better than if vegetation is treated outside the canyon. Surface
temperatures are closer to the observations, especially at night when
radiative trapping is important. The integrated vegetation version simulates
a more humid air inside the canyon. The microclimatic quantities (i.e., the
street-level meteorological variables) are better simulated with this new
version. This opens opportunities to study with better accuracy the urban
microclimate, down to the micro (or canyon) scale. |
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