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中国植被物候与地表温度空间特征研究

发表时间:2008-06-15  浏览量:1587  下载量:562
全部作者: 赵德华
作者单位: 南京大学生命科学学院
摘 要: 陆地生态系统对全球升温的响应是决定全球变化发展方向的重要因素之一,而物候对全球升温的响应是其中最为重要的内容之一。基于2005年MODIS产品研究了中国植被物候空间分布、温度与物候的关系和城市热岛对物候的影响,结果表明,中国植被物候、地表温度与纬度间存在显著的线性相关。中国城市与其周边地区相比,春季平均地表温度高1.3℃,秋季平均地表温度高1.0℃,植被返青期平均提前1.6 d,而休眠开始期推迟1.2 d.中国植被物候与地表温度间也存在显著的线性相关,温度每升高1℃,植被生长期延长2.1~2.4 d.与低纬度相比,高纬度地区植被物候对温度的变化更敏感。
关 键 词: 区域生态学;全球变化;物候;遥感;温度;城市热岛
Title: Spatial patterns of vegetation phenology and its relation with temperature in China
Author: ZHAO Dehua
Organization: College of Life Science, Nanjing University
Abstract: It is one of the most decisive factors that the feedback of terrestrial ecosystems to current changing climate for the development of future global climate, which promotes the studies on the response of regional ecosystems to global warming. The paper is to study spatial patterns of vegetation phenology and its relationship with temperature by MODIS remote sensing products. The results suggested that the special patterns of Chinese vegetation phenology and terra land surface temperature depended strongly on latitudes. The land surface temperature in urban areas was averagely 1.3℃ and 1.0℃ higher than adjacent areas in spring and autumn, respectively. For urban areas, the onset of greenup was 1.6 days earlier on average, and the onset of dormancy is 1.2 days later on average, relative to adjacent natural vegetation. There was significant linear relation between Chinese vegetation phenology and land surface. The rate of change of growing-season length with latitude was averagely 2.1~2.4 days in China. The results also suggested that the vegetation phenology in high latitudes was more sensitive to temperature variances than in low latitudes.
Key words: regional ecology; global climatic change; phenology; remote sensing; temperature; urban heat island
发表期数: 2008年10月第11期
引用格式: 赵德华. 中国植被物候与地表温度空间特征研究[J]. 中国科技论文在线精品论文,2008,1(11):1277-1284.
 
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