长江三角洲秋季热岛特征及演变分析

近年来,伴随着长三角地区经济快速增长,区域资源消耗加速和环境污染加剧现象突出,环境瓶颈日益凸显。利用MODIS陆地温度产品对地理带上的长江三角洲区域的城市群的城市热岛特征及演变进行研究。结果表明,经过十年的变迁,热岛分布向东南方向偏移;热岛强度总体呈现增强趋势。2010年呈现出清晰的"Z"字型分布。同时重点分析了南京、上海、杭州这几个大城市热岛强度的年际变化,其高温区的特征,均表现为"摊饼状",即以主城区为中心向周边扩展。

Characteristics Analysis on Heat Island Effect in Yangtze Delta Urban Agglomeration in Autumn

With the rapidly increasing of economy in the Yangtse Delta ,the acceleration of resources consumping and the exacerbation of environment pollution phenomenon are increasing. Thus, the bottleneck of environment has becoming prominent. The characteristics on heat island effect are analyzed in Geographical Yangtze Delta Urban Agglomeration based on MODIS land surface temperature products.The results show that ,after a decade of change,the distribution characteristics shows offseting to the southeast and heat island intensity shows an overall increasing trend.The heat islands are arranged clearly in "Z" distribution in 2010 .At the same time, the inner-annual variation of the heat island intensity was analyzed in Nanjing, Shanghai, Hangzhou.The characteristics of the high temperature zone is expressed as a way of making a pie,that is expending the main city to the rim.