麦地卡湿地地表参数变化及其与气候关系研究

Study on the Variation of Surface Parameters and Their Relationship with Climate in Medika Wetlands

以中国西藏自治区麦地卡湿地国家自然保护区为研究对象,基于2004年、2007年、2011年和2014年生长季的Landsat5TM/Landsat8 OLI数据提取归一化植被指数(normalized difference vegetation index,NDVI)与归一化水体指数(normalized difference water index,NDWI)。结合逐月气温、降水数据,以分析麦地卡湿地保护区不同湿地类型NDVI、NDWI变化特征和对气候变化的相关性。为揭示高原湿地与气候变化之间的机理提供依据,对高原湿地植被和水资源保护具有重要意义。

In this paper,vegetation and water bodies are extracted as the main surface parameters,and Landsat5 TM/Landsat8 OLI data based on the growing seasons of 2004,2007,2011 and 2014 are used as the study area in Medika Wetland National Nature Reserve in China to extract NDVI and NDWI indices.Combined with the month-by-month temperature and precipitation data,they were used to analyze the characteristics of NDVI and NDWI and their correlation to climate change in different wetland types in Maidika Wetland Reserve.It provides a basis for revealing the mechanism between plateau wetland and climate change,and is of great significance to the protection of plateau wetland vegetation and water resources.