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Chang’an University (长安大学) 2021

Spatial and Temporal Characteristics and Driving Forces of Vegetation over the Tibetan Plateau

柴立夫

Titre : Spatial and Temporal Characteristics and Driving Forces of Vegetation over the Tibetan Plateau

Auteur : 柴立夫

Grade : Master 2021

Université : Chang’an University (长安大学)

Résumé partiel
Climate change and human activities together lead to multi-scale ecosystem changes.At the regional scale,it is of great significance to explore the impact and contribution rate of human activities on the ecosystem for seeking ways of ecological restoration.As the largest plateau in China and the highest in the world,the Tibetan plateau has a vast area and a special geographical position,but its ecological environment is extremely fragile and sensitive.The spatiotemporal variation of NDVI and its driving forces over the Tibetan Plateau in the past 19 years were studied.The FLUS model was used to simulate and predict the future vegetation coverage of the Tibetan Plateau,and the vegetation coverage map of the Tibetan Plateau in 2028 was obtained.This study based on the Tibetan plateau region in 2000-2018 the normalized vegetation index(NDVI),meteorological data and socialconomic data,USES the trend analysis and residual analysis,relative importance calculation,FLUS vegetation coverage prediction methods,analyzed the nearly 19 years growing season of the Tibetan plateau vegetation coverage change rule,quantify the different types of human interference and predict the effects on the changes of vegetation coverage in the next decade the Tibetan plateau.This study provides a reliable scientific basis for the sustainable and coordinated development of the economy-society-ecological environment in the Tibetan plateau.The main research results of this article are as follows :(1)In terms of time variation,the NDVI of vegetation in the growing season of the Tibetan Plateau showed a fluctuating upward trend,and the monthly NDVI of vegetation in the growing season generally increased first and then decreased.The monthly variation rate was May(2.2%/10a)>,June(0.8%/10a)>July(0.5%/10a)>tember(0.4%/10a)> Au>(0.1%/10a).(2)In terms of spatial distribution,the average NDVI of the Tibetan Plateau was 0.33.The spatial distribution of vegetation NDVI in the growing season on the Tibetan Plateau during2000-2018 showed significant spatial differences,increasing from west to east and decreasing from northeast to southwest

Mots clés : The Tibetan Plateau ;Normalized Vegetation Index ;Climate Change ;Human Activities ;FLUS Model ;

Présentation (CNKI)

Page publiée le 18 mars 2022