西南地区植被对陆地水储量的响应  

Response of vegetation to terrestrial water storage in Southwest China

作　　者：王希尧 魏登峰 匡鸿海[1] WANG Xiyao;WEI Dengfeng;KUANG Honghai(School of Geographical Sciences,Southwest University,Chongqing 400715,China)

机构地区：[1]西南大学地理科学学院,重庆400715

出　　处：《应用生态学报》2023年第10期2723-2729,共7页Chinese Journal of Applied Ecology

基　　金：自然资源部重点实验室开放基金项目(KLSMNR-G202220)资助。

摘　　要：为探究中国西南地区植被生长对陆地水储量变化的响应规律,本研究利用重力恢复和气候实验(GRACE)卫星的陆地水储量异常(TWSA)数据以及归一化植被指数(NDVI)数据分析了2003年1月—2021年12月间中国西南地区植被与TWSA的变化趋势及相互关系。结果表明:研究期间中国西南地区的NDVI整体呈现上升趋势,而TWSA在西藏中南部呈现显著下降趋势,在西藏西北部及中国西南地区东南部呈现显著上升趋势。Pearson相关分析表明,中国西南地区NDVI对TWSA变化的响应具有显著的空间差异,西藏大部分区域NDVI对TWSA的变化呈现显著的负响应,而中国西南地区东南部大部分区域NDVI对TWSA的变化呈现显著的正响应,这受到气候变化与地貌差异的影响。To explore the responses of vegetation growth to change in terrestrial water storage in Southwest China,we analyzed the change trend and relationship between vegetation and terrestrial water storage anomaly(TWSA)in Southwest China from January 2003 to December 2021 by using TWSA data of Gravity Recovery and Climate Experi-ment(GRACE)satellite and normalized differential vegetation index(NDVI)data.The results showed that NDVI in Southwest China during the study period showed an overall upward trend.Meanwhile,TWSA showed a significant downward trend in central and southern Tibet,and a significant upward trend in northwest Tibet and southeast region of Southwest China.Results of Pearson correlation analysis showed that there were significant spatial differences in responses of NDVI to TWSA changes in Southwest China.NDVI had a significant negative response to TWSA changes in most regions of Tibet,but a significant positive response to TWSA changes in most regions of southeast region of Southwest China.Such differences were driven by climate change and topography.

关 键 词：植被变化 陆地水储量 GRACE NDVI 遥感 

分 类 号：Q948[生物学—植物学]