文献类型：期刊文献

英文题名：Impact of Extreme Climate on the NDVI of Different Steppe Areas in Inner Mongolia, China

作者：Chen, Kuan[1,2,3] Ge, Genbatu[2,3] Bao, Gang[4] Bai, Liga[4] Tong, Siqin[4] Bao, Yuhai[4] Chao, Luomeng[1]

第一作者：Chen, Kuan;陈宽

通信作者：Chao, LM[1]

机构：[1]Inner Mongolia Univ, Sch Ecol & Environm, Minist Educ, Key Lab Ecol & Resource Use Mongolian Plateau, Hohhot 010021, Peoples R China;[2]Chinese Acad Forestry, Expt Ctr Desert Forestry, Dengkou 015200, Peoples R China;[3]State Forestry Adm, Dengkou Desert Ecosyst Res Stn, Dengkou 015200, Peoples R China;[4]Inner Mongolia Normal Univ, Coll Geog, Hohhot 010022, Peoples R China

年份：2022

卷号：14

期号：7

外文期刊名：REMOTE SENSING

收录：;EI(收录号：20221511939172);Scopus(收录号：2-s2.0-85127548875);WOS:【SCI-EXPANDED(收录号:WOS:000781430000001)】；

基金：This research was supported from the National Natural Science Foundation of China (31060117) and the National Key R&D Program of China (2016YFC050604-4).

语种：英文

外文关键词：extreme climate; NDVI; desert steppe; typical steppe; meadow steppe; Inner Mongolia

摘要：The frequency of extreme climate events has increased resulting in major changes to vegetation in arid and semi-arid areas. We selected 12 extreme climate indices and used trend analysis and multiple linear regression models to analyze extreme climate trends in steppe areas of Inner Mongolia and their impact on the normalized difference vegetation index (NDVI). From 1998 to 2017, the NDVI of the Inner Mongolia steppe increased overall; however, there was a small area of decrease. Extreme climate indices related to warming exhibited increasing trends, particularly in the desert steppe. Although the extreme precipitation index did not change significantly overall, it increased in the northeastern and southwestern regions of the study area and decreased in the central region. The established model showed that the extreme climate explained the highest NDVI variation in desert steppe (R-2 = 0.413), followed by typical steppe (R-2 = 0.229), and meadow steppe (R-2 = 0.109). In desert steppe, TX90P (warm days index) had the greatest impact; in typical steppe, R10 (number of heavy precipitation days index) had the greatest impact; in meadow steppe, R95P (very wet days index) had the greatest impact. This study offered new insights into dynamic vegetation changes in steppe areas of Inner Mongolia and provided a scientific basis for implementing environmental protection strategies.