【摘要】 基于2006年Landsat5 TM影像与2017年Landsat8 OLI影像,通过大气校正法对福建省平潭综合实验区主岛——平潭岛进行地温反演,分析了平潭岛的填海造地变化以及全岛热岛效应的时空分布和演变特征,分析2006—2017年平潭岛填海活动与该岛热岛效应变化关系。结果表明:平潭岛12 a来人工填海面积增加约26 km~2(约占该岛面积的1/10)。2017年平潭岛人工填海区域的热岛效应显著增强;绿岛面积缩减明显,由14.48 km~2锐减至2.19 km~2,而强热岛与极强热岛面积分别从0.45和0.08 km~2增长至7.39和3.65 km~2。部分填海区域因植被覆盖率较高,在人工填海后仍然维持弱热岛甚至绿岛特征。平潭岛热岛效应具有明显的空间自相关性,2006—2017年热岛影响范围有所扩张;高-高关联的高温中心扩张与填海区域热岛区的扩张匹配度高。人工填海区周边1 km缓冲区内的极强热岛效应显著增强(增幅高达59.08%),其中极强热岛区域57.31%由早期强热岛区域演变而来。更多还原

【Abstract】 This study aimed to explore the expansion of artificial reclamation and its effect on urban heat islands(UHI) in Pingtan Island, the main island of the Pingtan Comprehensive Experimental Area in China, using the Thematic Mapper(TM) and Operational Land Imager(OLI) images. The relationship between the spatio-temporal variability of UHI and the areas of sea reclamation from 2006 to 2017 were explored in this study. The following results were obtained. Over more than a decade, the reclamation area in this region increased by 26 km~2, which is almost 1/10 of the entire area of Pingtan Island. UHI analysis using ENVI and the standard deviation method showed that the green island area decreased significantly, from 14.48 to 2.19 km~2, and the strong and very strong heat island areas increased, from 0.45 and 0.08 km~2 to 7.39 and 3.65 km~2, respectively. Some of the artificial reclamation areas still maintained the weak heat island and green island status due to the high vegetation cover. UHI of Pingtan Island showed significant spatial autocorrelation, and,the range of influence of UHI had expanded from 2006 to 2017.The high temperature central expansion of high-high correlation had a high matching degree with the expansion of UHI of reclamation area.The areas of very strong heat island significantly increased to 59.08% of artificial reclamation areas within their one kilometer buffer. And 57.31% of very strong heat island evolved from strong heat island.更多还原