摘要
为揭示中国地区植被动态变化对气候变化的响应机制,该文基于中国2000-2018年归一化植被指数(NDVI)数据及融合地面观测的气候数据,利用偏相关分析与多元线性回归分析探讨了近20年中国不同季节植被生长动态及其对气候变化的瞬时与滞后响应。研究结果表明:1)2000-2018年中国植被生长呈显著的“变绿”趋势,春季NDVI增幅最大;2)温度是促进春季植被生长的主导气候因子,降水对半干旱地区夏季植被的生长具有主导作用;3)考虑气候变化的滞后效应能显著提高对不同季节(尤其秋季)植被变化的解释能力;4)不同季节气候变化对植被生长的年际变率和年代际变率的贡献不尽相同。该文对预测未来中国植被的生长动态及其生态效益以及生态系统可持续管理策略的制定具有指导意义。
In order to reveal the response mechanism of vegetation dynamic changes to climate change in China,partial correlation analysis and multiple linear regression analysis were used to explore transient and lagging responses of the vegetation growth dynamics to climate change for different seasons in growing season over the past two decades in this study,which based on the integration of the MODIS NDVI data and the climatic data from ground observations in China from 2000 to 2018.The results are as follows.1)The vegetation growth in China showed a significant"greening"trend from 2000 to 2018,with the largest NDVI increased in spring.2)Temperature is the dominant climate factor that promotes vegetation growth in spring,and precipitation dominates the growth of summer vegetation in most semi-arid regions.3)Considering the lag effect of climate change can significantly improve the ability to explain vegetation changes in different seasons,especially in autumn.4)Climate changes in different seasons contribute differently to the interannual and interdecadal variability of vegetation growth.This study is of great significance for predicting the growth dynamics of Chinese vegetation and ecological benefits in the future,and for the formulation of sustainable ecosystem management strategies.
作者
王艳召
王泽根
王继燕
李伟
WANG Yan-zhao;WANG Ze-gen;WANG Ji-yan;LI Wei(School of Civil Engineering and Geomatics,Southwest Petroleum University,Chengdu 610000;School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610000;Land Reserve and Consolidation Center of Jingyang District,Deyang,Deyang 618000,China)
出处
《地理与地理信息科学》
CSCD
北大核心
2020年第4期33-40,76,F0003,共10页
Geography and Geo-Information Science
基金
国家自然科学基金项目(41701428)
西南石油大学科研“启航计划”项目(2017QHZ026)
西南石油大学测绘遥感青年科技创新团队项目(2017CXTD09)。
