蒙古高原植物生长期土壤水分时空变化特征

doi:10.13866/j.azr.2016.03.03

Abstract

Abstract: Soil moisture content is an important parameter of hydrological system. An inversion model of soil moisture content in the Mongolia Plateau was developed by using the ω-τ and Qp models based on AMSR-2 bright temperature data and SPOT Normalized Difference Vegetation Index data. The values of topsoil moisture content during the period from April to October 2013 were retrieved to study the spatiotemporal variation of topsoil moisture content. The results showed that the Pearson Correlation Coefficient between the retrieved and measured values of soil moisture content was 0.825,root-mean square error was 0.031 6 cm³·cm^-3,and the retrieval results were very good. The average values of topsoil moisture content varied in a range of 0.047-0.234 cm³·cm^-3,and spatially the soil moisture content was gradually decreased from north to south and from northeast to southwest. Spatiotemporally,the soil moisture content in the forest-sylvosteppe areas in north Mongolia and the Greater Khingan Mountains of Inner Mongolia fluctuated markedly.

Key words: plant growing season, moisture content, spatiotemporal variation, AMSR-2, the Mongolia Plateau

WEI Bao-cheng, YIN Shan, JIA Xu, BAO Yu-hai, NA Ri-su, YU Shan. Spatiotemporal Variation of Soil Moisture Content in the Mongolia Plateau in Plant Growing Season[J].Arid Zone Research, 2016, 33(3): 467-475.

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Spatiotemporal Variation of Soil Moisture Content in the Mongolia Plateau in Plant Growing Season

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