| Citation: | Actuality of summer urban heat island and the impact of urban planning “wedge-shaped greenland” to reducing the intensity of urban heat island in Beijing. J Appl Meteor Sci, 2005, 16(3): 357-366. DOI: 10.11898/1001-7313.20050310
|
Based on the remote sensing and surface observations, the actuality of urban heat island and the temperature distribution characteristics of urban land surface in Beijing are obtained. Using urban boundary layer model of Peking University, the study focuses on the impact of “Wedge-shaped greenland” plan on Beijing urban climate in the view of meteorology. This three-dimension urban boundary layer model is developed by using surface temperature calculated by energy balance model as lower boundary condition, and using mesoscale model MM5 as initial condition and lateral boundary conditions. This modeling system is used to investigate detailed structure of urban boundary layer under mesoscale background. Through case simulation, model system can simulate the characteristics of wind and temperature field correctly, and it can be used to do some test for the planning “Wedge-shaped greenland”. And the simulation result shows that this plan can reduce the temperature in and around the greenland, but it can result in the wind velocity reduction and bad ventilation in the downwind of the urban area.
| [1] |
Taha H, Akbari H, Rosenfeld A. Heat island and oasis effects of vegetative canopies:micrometeorological field measurements. Theor appl Climatol, 1991,44:123～138. doi: 10.1007/BF00867999
|
| [2] |
Akbari H, Kurn D M, Bretz S E, et al. Peak power and cooling energy savings of shade trees. Energe Buildings,1997, 25 (2):139～148. doi: 10.1016/S0378-7788(96)01003-1
|
| [3] |
Oke T R. Boundary Layer Climates. Metheun, London, 1987.
|
| [4] |
周红妹, 丁金才, 徐一鸣, 等.城市热岛效应与绿地分布的关系监测和评估.上海农业学报,2002,18(2):83～88. http://www.cnki.com.cn/Article/CJFDTOTAL-SHLB200202019.htm
|
| [5] |
Taha H. Modeling impacts of increased urban vegetation on ozone air quality in the south coast air basin. Atmos Environ, 1996, 30(20):3423～3430. doi: 10.1016/1352-2310(96)00035-0
|
| [6] |
Taha H, Konopacki S, Akbari H.Impact s of low ered urban air temperatures on precursor emission and ozone air quality.Journal of The Air & Waste Management Association, 1998, 48 (9):860～865.
|
| [7] |
Hut chison B A, Tayor F G.Energy conservation mechanisms and potentials of landscape design t o ameliorate building microclimates.Landscape J, 1983, 2(1):19～39. doi: 10.3368/lj.2.1.19
|
| [8] |
Urano A, Ichinose T, Hanadi K.Thermal environment sim ulation for three dimensional replacement of urban act ivit y. J Wind Eng Ind Aero, 1999, 81 :197～210. doi: 10.1016/S0167-6105(99)00017-3
|
| [9] |
Yokohari M, Brown R D, Kato Y, et al.The cooling effect of paddy fields in summertime air temperature in residential Tokyo, Japan.Landscape and Urban Planning, 2001, 53 :17～27. doi: 10.1016/S0169-2046(00)00123-7
|
| [10] |
佟华, 桑建国.北京海淀地区大气边界层的数值模拟研究.应用气象学报, 2002, 13(特刊):51～60. http://www.cnki.com.cn/Article/CJFDTOTAL-YYQX2002S1005.htm
|
Figures(8)
DownLoad: