Agromet
Vol. 20 No. 1 (2006): June 2006

PERANAN RUANG TERBUKA HIJAU DALAM MENGENDALIKAN SUHU UDARA DAN URBAN HEAT ISLAND WILAYAH JABOTABEK (THE ROLE OF URBAN GREEN SPACE IN HARNESSING AIR TEMPERATURE AND URBAN HEAT ISLAND. EXEMPLIFIED BY JABOTABEK AREA)

Sobri Effendy (Staf pengajar Program Studi Agroklimatologi IPB)
A. Bey (2Staf pengajar Program Studi Agroklimatologi IPB)
A.F. M. Zain (Staf Pengajar Program Studi Arsitektur Lansekap IPB)
I. Santoso (Staf pengajar Program Studi Agroklimatologi IPB)



Article Info

Publish Date
17 Jun 2006

Abstract

This study attempts to develop a functional relationship between air temperature and urban green space using Landsat data. It also aims to estimate the contributions of various forcings, namely, urban green space, population density, urban area, and automobile densities on urban heat island. Subsequently, the impact of urban heat island on temperature humidity index will be assessed quantitatively, followed by surface energy budget analysis of Jabotabek area. Air temperature series are derived from Landsat data, including the NDVI which is used as the bases in generating urban green space of the study area. Principal Component Analysis is utilized in order to establish the relative importance of forcing variables on urban heat island; in order to simplify the structure of factor loadings a varimax rotation is carried out. It is found that air temperature and urban green space for the study area is best represented by a nonlinear equation when a maximum coefficient determination (R2adj) and a minimum standard deviation (S) are to be fulfilled. A 10 to 50% reduction in urban green space would bring air temperature to raise between 0,2 to 1,8 oC. It is interesting to note that this study reveals the same percentage increase in urban green space would only lower the temperature by 0,1 to 0,5 oC. Automobile density is found to be the most important forcing for urban heat island in Jakarta; on the other hand, urban green space is the most dominant forcing in Tangerang and Bekasi. Surface energy budget analysis indicated that the an increase of 1,0 oC in urban heat island would result in additional 80,3 and 69,0 Wm-2 sensible heat fluxes to submedium (G) and to air, respectively.

Copyrights © 2006






Journal Info

Abbrev

agromet

Publisher

Subject

Agriculture, Biological Sciences & Forestry

Description

Agromet publishes original research articles or reviews that have not been published elsewhere. The scope of publication includes agricultural meteorology/climatology (the relationships between a wide range of agriculture and meteorology/climatology aspects). Articles related to ...