厦门精细化城市热岛日变化特征的初步研究

Primary Research on the Characteristics of the Refined Change of Heat Island in Xiamen

摘要: 热岛效应是指由于城市化所引起的城市地表及大气温度高于周边郊区的现象，是城市气候最显著的特征之一。台站气温资料一直被作为研究城市热岛时空演变规律的重要手段，随着观测资料的不断发展，更加精细化的自动站气温资料也被用于研究城市热岛的更多细节特征。本文即基于加密台站逐小时气温资料，利用克里金插值方法计算格点气温数据，结合土地利用/土地覆盖数据划分城市郊区范围，分析研究厦门精细化城市热岛的24小时时空演变特征。结果表明，热岛强度夜间大于白天，在00时热岛效应影响范围最大，主要分布在厦门市岛内北部和岛外的环岛区域的低温区。

Abstract: Urban heat island (UHI) effect refers to the phenomenon caused by urbanization that surface temperature and atmospheric temperature in urban area are higher than those in surrounding suburbs. It is a remarkable characteristic of urban climate system. Using temperature data set of meteorological station has been an important method to research the space-time changes of UHI. With the development of observation technology, more refined temperature data is used to research the more detailed characteristics of UHI. This research is based on hourly temperature data of regional automatic weather station (AWS) to analyze the characteristics of daily space-time changes of UHI in Xiamen. The algorithm applied the ordinary Kriging method that was used in spatial interpolation to calculate grid field temperature data, and delimit the urban and suburbs by land-cover data. The results indicate that UHI intensity is higher in night than in daytime, and the impact of heat island effect is greatest at 00 o’clock. It’s mainly distributed in the north of the Xiamen urban and the are-as around suburbs that are low-temperature areas.