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Summertime heat island effects of urban design parameters.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Summertime heat island effects of urban design parameters.
作者:	Emmanuel, Martin de Porres Rohinton.
面頁冊數:	143 p.
附註:	Chair: Jong-Jin Kim.
附註:	Source: Dissertation Abstracts International, Volume: 58-05, Section: A, page: 1474.
Contained By:	Dissertation Abstracts International58-05A.
標題:	Architecture.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9732073
ISBN:	059141631X

Summertime heat island effects of urban design parameters.
Emmanuel, Martin de Porres Rohinton.

Summertime heat island effects of urban design parameters.[electronic resource] - 143 p.

Chair: Jong-Jin Kim.

Thesis (Ph.D.)--University of Michigan, 1997.

On the basis of these findings, the study evaluates the current urban design suggestions for mitigating the heat island effects. It also proposes six urban design strategies for the mitigation of Ann Arbor heat island. Four of these strategies are applicable to the downtown core while the rest apply to the residential periphery. Design strategies for the downtown core emphasize building massing that leads to street level shading during the day without reducing the sky view. This is achieved by proposing arcades around downtown city blocks with set-back building massing. Strategies for the residential periphery aim at increasing the tree cover. They also propose courtyard building form with grass covered inner lawns to allow for building shaded, soft surfaced commons.

ISBN: 059141631XSubjects--Topical Terms:

208437
Architecture.

Summertime heat island effects of urban design parameters.
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500 $a Source: Dissertation Abstracts International, Volume: 58-05, Section: A, page: 1474.
502 $a Thesis (Ph.D.)--University of Michigan, 1997.
520 # $a On the basis of these findings, the study evaluates the current urban design suggestions for mitigating the heat island effects. It also proposes six urban design strategies for the mitigation of Ann Arbor heat island. Four of these strategies are applicable to the downtown core while the rest apply to the residential periphery. Design strategies for the downtown core emphasize building massing that leads to street level shading during the day without reducing the sky view. This is achieved by proposing arcades around downtown city blocks with set-back building massing. Strategies for the residential periphery aim at increasing the tree cover. They also propose courtyard building form with grass covered inner lawns to allow for building shaded, soft surfaced commons.
520 # $a Summer microclimate variations at seven sites in Ann Arbor, Michigan, were evaluated using thermal comfort indices based on wet, dry and globe temperatures. These indices were correlated to variations in building density, ground cover, tree canopy cover and maturity. Building density and ground cover data were derived from digital orthographic images of the city. Tree canopy characteristics were estimated using light measurements and the Beer-Lambert law. Further analysis of microclimate variations in the city utilized wet and dry bulb temperature data obtained by a mobile instrument panel. Detailed evaluation of climate variations around each of the selected sites was also made.
520 # $a The results revealed a downtown-centered heat island at night while there was a mix of cool and heat islands at day. The daytime variations were strongly correlated to the amount of canyon shading. During the night, urban climate variations across the city were highly correlated to variations in tree cover. However, the sky view factor and the thermal properties of building materials exerted greater influences upon nocturnal thermal comfort at the street level. The daytime cooling associated with extensive tree canopy was not different from cooling by building shade. Furthermore, extensive tree cover inhibited nighttime comfort due to the reduced sky view.
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