典型气候要素对雅鲁藏布江流域生长季植被覆盖度的协同影响  

Synergistic effect of typical climate elements on vegetation coverage during the growing season in Yarlung Zangbo River basin

作　　者：颜梦 肖燕 夏兴生 朱秀芳 潘耀忠 YAN Meng;XIAO Yan;XIA Xing-sheng;ZHU Xiu-fang;PAN Yao-zhong(Institute of Plateau Science and Sustainable Development,Qinghai Normal University,Xining 810016,China;School of Geography and Environment,Liaocheng University,Liaocheng 252000,China;School of Ecology and Environment,Tibet University,Lhasa 850000,China;College of Geographic Sciences,Qinghai Normal University,Xining 810016,China;State Key Laboratory of Remote Sensing Science,Department of Geographic Sciences,Beijing Normal University,Beijing 100875,China)

机构地区：[1]青海师范大学高原科学与可持续发展研究院,青海西宁810016 [2]聊城大学地理与环境学院,山东聊城252000 [3]西藏大学生态环境学院,西藏拉萨850000 [4]青海师范大学地理科学学院,青海西宁810016 [5]北京师范大学地理科学学部,遥感科学国家重点实验室,北京100875

出　　处：《青海师范大学学报(自然科学版)》2025年第1期26-34,共9页Journal of Qinghai Normal University(Natural Science Edition)

基　　金：第二次青藏高原科学考察研究(2019QZKK0903、2019QZKK0606);国家自然科学基金项目(42201027)。

摘　　要：气候与植被生长密切相关,研究气候敏感区或生态脆弱区的气候与植被的关系可为生态系统的演化规律分析和全球变化的监测提供一定的参考.本研究选择雅鲁藏布江流域为研究区,以归一化植被指数(NDVI)、气温和降水分别作为植被和气候变化的代表性指标,利用趋势分析、F检验、t检验、偏相关分析以及多元回归分析方法,在分析2001-2020年各指标时空变化特征基础上,探究了气温、降水对NDVI的协同影响.结果表明:NDVI与气温、降水空间分布特征均为从东南向西北递减,流域内NDVI与气温主要为增加趋势,降水为减少趋势,显著变化区域集中在拉萨市和山南市;拉萨市、山南市的NDVI受到气温、降水的协同影响,日喀则市受到降水较大影响,其余地区气温、降水对植被影响作用不明显.整体上,气候要素对雅鲁藏布江流域植被覆盖度的影响空间异质性强,影响区域分布集中,且部分区域主要受到气温/降水单一要素影响.Climate is closely related to vegetation growth.Studying the correlation between climate and vegetation in climate-sensitive areas or ecologically fragile areas can provide some reference for the analysis of ecosystem evolution and the monitoring of global changes.In this study,Yarlung Zangbo River Basin was selected as the research area,and the normalized difference vegetation index(NDVI),temperature and precipitation were used as the representative indicators of vegetation and climate change,respectively.Based on trend analysis,F test,t test,partial correlation analysis and multiple regression analysis,anlyzed the spatial and temporal variation characteristics of each index from 2001 to 2020,explored the synergistic effects of temperature and precipitation on NDVI.The results show:on the spatial and temporal scales,the spatial distribution characteristics of NDVI,temperature and precipitation decreased from southeast to northwest,NDVI and temperature in the basin mainly showed an increasing trend,the precipitation showed a decreasing trend,and the significant change areas were concentrated in Lhasa and Shannan;NDVI of Lhasa and Shannan was affected by the synergistic effect of temperature and precipitation,Shigatse was greatly affected by precipitation,and the effect of temperature and precipitation on vegetation in other areas was not obvious.Overall,the influence of climate elements on vegetation coverage in Yarlung Zangbo River Basin has strong spatial heterogeneity,and the distribution of the affected areas is concentrated,and some areas are mainly affected by the single factor of temperature/precipitation.

关 键 词：NDVI 气温 降水 协同影响 雅鲁藏布江流域 

分 类 号：Q948[生物学—植物学] P467[天文地球—大气科学及气象学]