Spatio-temporal response of vegetation coverage at multiple time scales to extreme climate in the Qinling mountains in Northwest China  

作　　者：Qing Meng XiaoBang Peng ShanHong Zhang 

机构地区：[1]Shangluo Carbon Neutralization Engineering Technology Research Center,College of Urban,Rural Planning and Architectural Engineering,Shangluo University,Shangluo 726000,China

出　　处：《Research in Cold and Arid Regions》2024年第6期302-309,共8页寒旱区科学(英文版)

基　　金：funded by Protection and Development of Climate Resources in the Qinling Mountains(23QLX003);Study on Precipitation Variation and Downscaling in the Qinling Mountains(22SKY107);Shangluo Carbon Neutralization Engineering Technology Research Center and Innovation Team of Water Resources Protection of Middle Route of South-to-North Water Diversion(SK2017-44).

摘　　要：Monitoring spatio-temporal variations in vegetation coverage and linking them to climatic drivers is crucial for guiding environmental management and understanding climate change.In this study,Pearson's correlation,MODIS NDVI time series,precipitation and temperature data,and extreme climate indices were used to investigate the response of vegetation to extreme climate at the monthly,seasonal,and yearly scales in the Qinling Mountains(QMs)in China from 2001 to 2020.The results indicate that vegetation coverage increased over time at a rate of 2.9×10^(-3) per year.The QMs exhibited good vegetation coverage(average NDVI?0.64),with over 64% of the area featuring NDVI values between 0.60 and 0.80.The Mean center was located in Ningshan County on the southern slope of the QMs.The spatial pattern of the annual average NDVI on the northern and southern slopes of the QMs was consistent with the seasonal average variation,with high values in the middle and low values at the edges.As transitional climate regions,the QMs exert a significant impact on vegetation.Spring maximum continuous 5-day monthly precipitation(Rx5day)and spring precipitation were the two most significant positive controlling factors affecting vegetation.Specifically,aside from water bodies,grasslands exhibited the largest response to these two factors.Good vegetation conditions in the QMs are of great significance for regulating climate and conserving water sources.Furthermore,they are important for controlling the response of vegetation to climatic conditions and,in a deeper sense,are of great significance for vegetation restoration,ecological protection,and carbon neutrality.

关 键 词：Vegetation coverage Extreme climate The Qinling mountains Multiple scales 

分 类 号：Q94[生物学—植物学]