基于景观格局的常熟市地表热环境季节变化特征

发布时间：2018-01-09 14:24

本文关键词：基于景观格局的常熟市地表热环境季节变化特征　出处：《生态学杂志》2016年12期 　论文类型：期刊论文

【摘要】：随着城市化进程的加快,城市热岛越来越受到人们的关注,但多数研究集中在超大和大型城市,而对中小城市的研究较少。随着城镇化发展,中小城市的生态环境问题也逐渐成为关注的焦点。本文以长江三角洲地区常熟市为研究对象,利用Landsat-8数据分析了城市热岛的季节变化特征,并结合同年份的土地利用类型数据,从景观格局角度分析不同用地类型对城市热岛的影响。结果表明:水体、湿地、林地等用地对城市热岛的影响存在阈值,超过该阈值后影响不再显著。城市热岛的季节变化分析表明,常熟市冬季热岛强度最大,水田、旱地的暖岛效果明显;而夏季热岛强度最小,水体的冷岛效果明显,表明常熟地表热环境较佳。利用地理探测器方法对建设用地温度的影响因子分析表明,不同土地利用类型交互作用影响建设用地的地表温度,其中夏季水体的影响最大,而冬季旱地的影响最大。研究结果可为常熟市生态环境建设提供重要的参考依据。
[Abstract]:With the acceleration of urbanization, more and more people pay attention to urban heat island, but most of the research is focused on large and large cities, but the research on small and medium-sized cities is less, and with the development of urbanization. The ecological environment of small and medium-sized cities has gradually become the focus of attention. This paper takes Changshu City in the Yangtze River Delta as the research object and analyzes the seasonal variation characteristics of urban heat island by using Landsat-8 data. The effects of different land use types on urban heat island were analyzed from the view of landscape pattern. The results showed that there was a threshold value for the influence of water, wetland and woodland on urban heat island. The seasonal variation analysis of urban heat island shows that the intensity of winter heat island in Changshu is the largest, and the effect of warm island in paddy field and dry land is obvious. However, the intensity of summer heat island is the least, and the effect of cold island is obvious, which indicates that the surface thermal environment of Changshu is better. The interaction of different land use types affects the surface temperature of construction land, and the summer water body has the greatest influence. The results can provide important reference for ecological environment construction in Changshu city.
【作者单位】：中国科学院遥感与数字地球研究所遥感科学国家重点实验室;江西理工大学;
【基金】：“十二五”科技支撑项目(2012BAJ24B01)资助
【分类号】：P901;X16
【正文快照】： “十二五”科技支撑项目(2012BAJ24B01)资助。城市热岛是指城区温度明显高于郊区温度的现象(苏泳娴,2011),由Howard(1833)最早发现并记录下来。由于城市热岛在很大程度上取决于城市规模(主要指人口规模)(Karl et al.,1988;Oke,1989),所以城市规模越大,热岛强度越强。虽然热岛

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