庙岛群岛南五岛地表温度时空特征及影响因子  

Spatial-temporal characteristics and impact factors of land surface temperature of Five Southern Islands of Miaodao Archipelago,Shandong,China

作　　者：池源[1] 石洪华[1] 王晓丽[2] 丰爱平[1] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]天津理工大学环境科学与安全工程学院,天津300384

出　　处：《生态学杂志》2015年第8期2309-2319,共11页Chinese Journal of Ecology

基　　金：科技基础性工作专项(2012FY112500);国家海洋局第一海洋研究所基本科研业务费专项(2015G13);海洋公益性行业科研专项(201305023和201505012)资助

摘　　要：海岛生态系统具有明显的脆弱性和独立性,地表温度(LST)在海岛地表能量平衡和资源环境变化中具有重要作用。以庙岛群岛南五岛为研究区,通过RS和GIS手段,构建南五岛LST估算模型,分析南五岛LST时空特征及其影响因子。结果表明:南五岛春、夏、秋、冬四季LST均值分别为12.05、32.93、13.91和7.76℃,全年LST均值为16.66℃;不同海岛全年LST均值由大到小依次为南长山岛、北长山岛、庙岛、大黑山岛和小黑山岛,不同地表覆盖类型全年LST均值由大到小依次为建设用地、农田、阔叶林、草地、裸地和针叶林,海岛全年LST均值随着建设用地比例的增大而上升;NDVI、高程和坡度三者共同作用于LST,其中春、夏、秋三季及全年与LST显著负相关,冬季则显著正相关;坡向单独对LST产生影响,全年及不同季节均与LST呈显著正相关;夏季57个点位的土壤含水量与LST呈显著正相关,典型海岛生态系统特征可能是形成该结果的原因。Island ecosystem has the characteristics of vulnerability and self-containment due to its limited area and isolated space, and land surface temperature （LST） is of greater importance to surface energy balance and resources/environmental changes on island. In this study, Five South- ern Islands of Miaodao Archipelago were used as the study areas and a LST model was established based on split-window algorithm and regional characteristics. Then, the values of LST in different seasons, of different islands and under different types of land cover were calculated using methods of RS and GIS, and NDVI, altitude, slope, aspect and soil water content were adopted to reveal the factors impacting LST. The results showed that the mean values of LST in spring, summer, autumn and winter were 12.05, 32.93, 13.91 and 7.76 ℃ , respectively, and the annual mean value of LST was 16.66 ℃. The annual mean values of LST of the different islands showed the foI- lowing descending order： Nanchangshan Island 〉 Beiehangshan Island 〉 Miao Island 〉 Dahei- shan Island 〉 Xiaoheishan Island, which displayed the maximum difference of 1.89 ℃. The types of land cover included construction land, farmland, broad-leaf forest, grassland, bare land and coniferous forest land in the descending order of annual mean value of LST, and displayed the maximum difference of 1.63 ℃. The differences in land cover characteristics were the main cause of the differences in LST of different islands and the annual mean value of LST was positively as- sociated with the proportion of construction land. NDVI, altitude and slope together influenced LST, and showed a significant negative correlation with LST in the whole year and spring, sum- mer, autumn, and a significant positive correlation with LST in winter. Aspect independently in-fluenced LST, which showed a significant positive correlation with LST during the whole year and each season. Soil water content derived by field investigation at 57 sampling sites had no obvious relationship with NDV

关 键 词：地表温度 地表特征 归一化植被指数 土壤含水量 

分 类 号：P426.1[天文地球—大气科学及气象学]