应用生态学报2018，Vol.29Issue(4)：1107-1116,10.DOI:10.13287/j.1001-9332.201804.002
青藏高原植被生长对PDO响应的季节分异
Seasonal divergence in the responses of vegetation growth to PDO in Tibetan Plateau, China
摘要
Abstract
Regional-scale normalized difference vegetation index (NDVI) derived from satellite remote sensing observations and gridded climate data were used to study the seasonal responses and underlying mechanisms of vegetation growth over Tibetan Plateau to Pacific Decadal Oscillation (PDO) at period of 1982-2015,by performing Spearman correlation analysis and enhanced multivariate regression model:structural equation model (SEM).The results showed that there was significant negative correlation between PDO index and mean growing-season (April-October) NDVI over Tibetan Plateau;however,marked seasonal divergence in the relationship between PDO and vegetation growth existed among different seasons.It characterized with stronger negative correlation between PDO and NDVI in autumn than in summer,and winter PDO had significant effect on consequent summer vegetation growth.Additionally,it showed great divergence in control processes of PDO on vegetation growth among different seasons,with significant control of PDO on both temperature and precipitation in summer,and significant control of PDO on temperature only in autumn.关键词
PDO/青藏高原/植被生长/季节响应/结构方程模型/气候变化Key words
PDO/Tibet Plateau/vegetation growth/seasonal response/structural equation model (SEM)/climate change引用本文复制引用
石芳忠,李小雁,吴秀臣,刘文玲,裴婷婷,孔冬冬,蒋志云,张瑜..青藏高原植被生长对PDO响应的季节分异[J].应用生态学报,2018,29(4):1107-1116,10.基金项目
本文由国家自然科学基金项目(41571038)和地表过程与资源生态国家重点实验室项目(2017-ZY-06)资助 （41571038）
This work was supported by the Project of National Natural Science Foundation of China (41571038) and the Project of Key Laboratory of Surface Processes and Resource Ecology of China (2017-ZY-06). （41571038）
