The Local Climate and Energy Budget Differences between a Typical Architectural Complex and a Green Park in Beijing

• Published in: Procedia environmental sciences Vol. 13; pp. 1907 - 1921
• Main Authors: Cui, Y.P., Liu, J.Y., Kuang, W.H., Wang, J.B.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2012
• Subjects: Beijing; heat island effect; latent heat ;LUMPS; urban energy balance; Beijing; heat island effect; latent heat ;LUMPS; urban energy balance
• ISSN: 1878-0296; 1878-0296
• DOI: 10.1016/j.proenv.2012.01.185

Understanding theimpact of urban underlying surfaces on the urban local climate is very important. The analysis on climatic characteristics of different urban landscape communities can play an important part in understanding the urban surface – atmosphere interaction, urban planning and landscape design. In this study, meteorology and radiation observation data of two typical urban landscape communities (a typical architectural complex and a green park) in Beijingwere used to analyze the climate differences and energy budget items differences with alocalscaleurban meteorological parameterization scheme (LUMPS). The results showed that: 1) Comparison with the green park, the architectural complexwas more hot-dry climatic conditions than the green park.The difference value of air temperature and relative humidity of the two communities were 0.30°C and 2.0% separately. 2) The changes of energy budget items could explain the change process of air temperature. The heat budget of different landscape communities existed differences, especially net radiation and latent heat flux, which displayed a marked difference. Therein, the annual mean net radiation and the latent heat flux of the green park were 14.33W/m2and 14.56W/m2 higher than the architectural complex area, respectively. While the sensible heat flux of the green park was 2.9W/m2 lower than the architectural complex area. 3) The latent heat flux had close relationship with air temperature, and had a lag effect. The correlation coefficient between latent heat flux and temperature could reach 0.633 from the initial 0.513 after about 2-hour delay. All these demonstrated the important effects of latent heat on temperature.