基于GEE的奈曼旗植被覆盖时空演变及驱动力分析  

Spatial and temporal evolution and its driving force on vegetation cover in Naiman Banner based on Google Earth Engine

作　　者：张神宝 王永芳[1,2,3] 郭恩亮 包慧娟 ZHANG Shenbao;WANG Yongfang;GUO Enliang;BAO Huijuan(College of Geographical Science,Inner Mongolia Normal University,Hohhot 010022,Inner Mongolia,China;Inner Mongolia Key Laboratory of Disaster and Ecological Security on the Mongolian Plateau,Inner Mongolia Normal University,Hohhot 010022,Inner Mongolia,China;Provincial Key Laboratory of Mongolian Plateau’s Climate System,Inner Mongolia Normal University,Hohhot 010022,Inner Mongolia,China)

机构地区：[1]内蒙古师范大学地理科学学院,内蒙古呼和浩特010022 [2]内蒙古自治区蒙古高原灾害与生态安全重点实验室,内蒙古呼和浩特010022 [3]蒙古高原气候变化与区域响应高校重点实验室,内蒙古呼和浩特010022

出　　处：《草业科学》2023年第8期1965-1976,共12页Pratacultural Science

基　　金：内蒙古自治区哲学社会科学规划项目(2020NDA050)。

摘　　要：借助谷歌地球引擎平台(GEE),计算1991-2020年奈曼旗植被覆盖度(FVC),并利用Sen氏斜率趋势分析方法对FVC时空演变特征进行分析。结合同期气象数据,运用偏相关与残差分析方法,定量评估FVC对气候因子、人类活动的响应关系。结果表明:1991-2020年奈曼旗FVC呈波动上升趋势,空间上FVC呈现南北高、东西低的分布格局;1991-2020年奈曼旗植被覆盖各个等级相互转化,植被覆盖“低转高”的面积远大于“高转低”,表明奈曼旗植被恢复状况良好;气候因子并非研究区FVC变化的必然结果。相反,人类活动则是30年间FVC变化的主要驱动因素。研究结果可为奈曼旗生态环境建设和可持续发展提供科学参考依据。The study of vegetation cover is an effective approach for assessing ecological and environmental benefits.The fractional vegetation cover(FVC)of the Naiman Banner from 1991 to 2020 was calculated using Google Earth Engine(GEE).Further,the spatio-temporal evolution characteristics of FVC were analyzed using Sen’s slope trend analysis method.Based on the meteorological data of the same period,the FVC response to changes in climatic factors and human activities was quantitatively assessed using partial correlation and residual analysis methods.The results showed that from 1991 to 2020,FVC showed a fluctuating upward trend,and the spatial FVC showed a distribution pattern of higher values in the north-south region and lower values in the east-west region.Additionally,from 1991 to 2020,the vegetation cover was transformed at various levels,and the area of vegetation cover that changed from“low to high”was much greater than that from“high to low”,indicating that the vegetation has recovered well over the past 30 years.Interestingly,climatic variables were not the inevitable causal factors of FVC changes in the study area.Instead,human activity was the main driver of FVC change over the last 30 years.These research results will provide a scientific reference for the ecological environment construction and sustainable development of the Naiman Banner.

关 键 词：谷歌地球引擎 植被覆盖 长时间序列 时空特征 气候变化 人类活动 科尔沁沙地 

分 类 号：Q948.1[生物学—植物学]