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Xinjiang Agricultural University (2021)

Spatio-Temporal Variation Characteristics of Surface Albedo and Analysis of Influential Factors in Junggar Basin

邓小进

Titre : Spatio-Temporal Variation Characteristics of Surface Albedo and Analysis of Influential Factors in Junggar Basin

Auteur : 邓小进

Grade : Master 2021

Université : Xinjiang Agricultural University

Résumé partiel
Surface albedo influences the balance between surface radiation and energy,thereby affecting regional and global climates.The typical desert environment in Junggar Basin,located in the hinterland of Central Asia,is an indicator of climate change in arid areas.In the process of climate change,the unique underlying surface can sensitively reflect the dry and wet,cold and warm processes of regional climate change.Hence,the temporal and spatial variation characteristics of surface albedo in Junggar Basin,as well as its influencing factors,are studied,which has irreplaceable regional characteristics and scientific significance for correctly understanding the land surface characteristics of Junggar Basin,and improving the ecological environment and climate monitoring.It also provides theoretical foundation for objective evaluation of the land surface change and its positive and negative feedback response mechanism in arid areas under global climate change.Taking Junggar Basin as the research object,the surface albedos in short wave,near infrared and surface albedo of visible light are retrieved based on MODIS satellite remote sensing data and MOD09A1 product.The temporal and spatial variation characteristics of surface albedo,air temperature,precipitation and NDVI in Junggar Basin from 2001 to 2018,and the variation characteristics of surface albedo of different land use types are analyzed based on meteorological data,vegetation NDVI and land use type data.After that,the correlation among surface albedo of different bands and air temperature,precipitation and NDVI is analyzed,and the temporal and spatial response of surface albedo and influencing factors is also discussed.

Mots clés : Junggar Basin ;surface albedo ;land use types ;spatio-temporal variation ;NDVI;

Présentation (CNKI)

Page publiée le 14 mars 2022