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Nanjing University of Information Science and Technology (南京信息工程大学) 2021

The Difference Study of Local Climate on Artificial Shelter Forest Land and Natural Sandy Land in Taklimakan Desert Hinterland

Titre : The Difference Study of Local Climate on Artificial Shelter Forest Land and Natural Sandy Land in Taklimakan Desert Hinterland

Auteur : 霍文

Grade : Doctoral Dissertation 2021

Université : Nanjing University of Information Science and Technology (南京信息工程大学)

Résumé partiel
The climate over the Taklinakan Desert is extremely arid.As the establishment of oil base,a total of 2km artificial green vegetation land(hereafter,AGVL)have beenformed in the sand dune.Due to the change of properties of underlying surface,and the following chain reaction of meteorological characteristic parameters,the structure of energy distribution near the stratum is changed,and the strong contrast between local climate and desert climate is formed.Therefore,it is necessary to study the varied interval of threshold of meteorological factors and regional climate characteristics of AGVL under the background of desert,and the difference of flux parameters between AGVL and natural sandy land(hereafter,NSL)as well as the response of important parameters of land surface process to local climate of AGVL need to be of comprehensive evaluation and in-depth analysis.For this purpose,weobtain the synchronous observation data of AGVL and NSL during the growing season,using high-precision observation instruments and advanced experimental methods.Meanwhile,in view of the edge effect of AGVL,intensified observation experiments are carried out synchronously.The discrepencyof local climate of underlying surface are quantitatively analyzed by the some methods such as theoretical research,experimental data analysis and numerical simulation.Furthermore,we have revealed the mechanism of the phase difference of sensible and latent heat with the time distribution.We also conduct a parameterized comparsion and analysis between the simulated measurments of land surface process and actual measurments,and evaluate the response of parameterized scheme to local climate.Our study provides scientific experimental data that support for sustainable development of AGVL in desert region.Besides,our research also provide important reference and research basis for the land-atmosphere interaction and influence mechanism between Desert-oasis region.The mainly obtained results are as follows:1)From sunrise to noon,the increasing rate of temperature in NSL is higher than that in AGVL,and the opposite results occur between noon and sunset

Mots clés : Artificial Green Vegetation Land ;Natural Sandy Land ;Taklimakan Desert ;Local Climate Difference ;

Présentation (CNKI)

Page publiée le 8 avril 2022