摘要
为进一步研究相同气候格局在不同位置的植被覆盖动态变化,并为研究全球气候变化背景下不同位置在相同气候格局的植被覆盖变化情况可能产生的响应奠定基础,为高山植被保护工作提供帮助,为全球气候变化对植被覆盖变化影响的研究提供数据支持。本研究利用地理信息技术手段,通过高程影像、气候数据、遥感影像解译等方法,获得帕隆藏布流域与察隅河流域1971-2020年的气候变化数据与1989-2020年连续完整的植被覆盖动态变化NDVI数据。通过分析两流域NDVI变化趋势及其与气候因子的相关性,探讨气候变化对两流域植被覆盖变化的影响。结果表明,帕隆藏布流域与察隅河流域植被NDVI均呈整体上升趋势,且均在2015年达到最大值2019年达到最小值,帕隆藏布与察隅河流域植被NDVI呈现增长的位置均位于海拔较低且地形遮蔽的环境。两流域植被覆盖变化情况与降水量之间呈现出现显著的降水滞后性,同时两流域植被覆盖变化受到风速尤其是冬春季风速极显著的负面影响。察隅河流域的植被覆盖变化受年均温度及七月最低温的影响。帕隆藏布流域植被覆盖增长情况小于察隅河流域,并且帕隆藏布流域的植被覆盖变化对除降水外的气候因子的响应均小于察隅河流域。得出的结论是相同气候条件背景下,两流域毗邻且之间由高大山脉阻隔的情况下,植被覆盖变化情况整体均为上升趋势,但较靠近海洋位置的察隅河流域内植被覆盖变化情况对气候变化的响应更明显,而由高大山体阻挡且较靠近青藏高原腹部的帕隆藏布流域植被覆盖变化情况除对降水的需求外,对气候变化的响应均小于较靠近海洋位置的察隅河流域。
This study is aimed to lay a foundation for further research on the dynamic changes of vegetation cover in different locations of the same climate pattern and the possible responses to the changes of vegetation cover in different locations of the same climate pattern under the background of global climate change,to provide help for the protection of alpine vegetation,and to provide data support for the research on the impact of global climate change on vegetation cover change.In this study,the climate change data of Parlung Zangbo Basin and Zayu River Basin from 1971 to 2020 and the NDVI data of continuous and complete dynamic change of vegetation cover from 1989 to 2020 were obtained by means of geographic information technology and the interpretation of elevation images,climate data and remote sensing images,and by analyzing the trend of NDVI change and its correlation with climate factors,the influence of climate change on vegetation cover change in the two basins was discussed.Vegetation NDVI in Parlung Zangbo Basin and Zayu River Basin showed an overall rising trend,and reached the maximum value in 2015 and the minimum value in 2019.Vegetation NDVI in Parlung Zangbo River Basin and Zayu River Basin showed growth in low altitude and sheltered terrain environment.There is a significant precipitation lag between vegetation cover change and precipitation in the two basins,and vegetation cover change in the two basins is significantly negatively dffected by wind speed,especially in winter and spring.Vegetation cover in Chayu River Basin is affected by the average annual temperature and the lowest temperature in July.The growth of vegetation cover in Parlung Zangbo Basin is smaller than that in Chayu River Basin,and the response of vegetation cover change in Parlung Zangbo Basin to climate factors except precipitation is smaller than that in Chayu River Basin.Under the same climatic conditions,when the two basins are adjacent to each other and separated by high mountains,the vegetation cover change of the two basins has an overall upward trend,but the vegetation cover change of the Chayu River Basin,which is closer to the ocean,has a more obvious response to climate change.However,the vegetation cover change of Parlung Zangbo Basin,which is blocked by tall mountains and close to abdomen of the Tibetan Plateau,is less responsive to climate change than that of Chayu River Basin,which is close to the ocean,except for the demand for precipitation.
作者
张光祖
田睿
周尧治
Zhang Guangzu;Tian Rui;Zhou Yaozhi(Institute of Plateau Ecology,Xizang College of Agricultural and Animal Husbandry,National Field Scientific Observation and Research Station of Linzhi Alpine Forest Ecosystem in Xizang,Key Laboratory of Alpine Vegetation Ecological Security in Xizang Autonomous Region,Key Laboratory of Forest Ecology in Xizang Plateau(Xizang College of Agricultural and Animal Husbandry),Ministry of Education Forestry and Grassland Bureau of Linzhi City)
出处
《高原农业》
2024年第3期276-289,共14页
Journal of Plateau Agriculture
关键词
气候变化
NDVI
植被覆盖变化
Climate Change
Normal Difference Vegetation Index
Change of vegetation cover
作者简介
张光祖(1998-),男,满族,辽宁,硕士生。研究方向:从事高山树线方面研究;通信作者:周尧治(1976-),男,汉族,湖南,副教授,博士后。研究方向:从事景观生态学及恢复生态学研究。
