干旱区研究

干旱区研究 >

2016 , Vol. 33 >Issue 3: 467 - 475

DOI: https://doi.org/10.13866/j.azr.2016.03.03

土壤及其利用

蒙古高原植物生长期土壤水分时空变化特征

  • 魏宝成 ,
  • 银山 ,
  • 贾旭 ,
  • 包玉海 ,
  • 那日苏 ,
  • 玉山
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  • 1.内蒙古师范大学地理科学学院,内蒙古 呼和浩特 010022;
    2.内蒙古师范大学遥感与地理信息系统重点实验室,内蒙古 呼和浩特 010022;
    3.内蒙古农业大学生态环境学院,内蒙古 呼和浩特 010018
魏宝成(1989-),男,硕士研究生,研究方向为自然灾害监测与评估.E-mail:nsdwbc@126.com

收稿日期: 2015-10-27

  修回日期: 2016-02-29

  网络出版日期: 2016-05-31

基金资助

国家自然科学基金(61550005);“十二五”科技支撑项目(2013BAK05B01);内蒙古自然科学基金(2013MS0601)资助

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

  • WEI Bao-cheng ,
  • YIN Shan ,
  • JIA Xu ,
  • BAO Yu-hai ,
  • NA Ri-su ,
  • YU Shan
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  • 1. College of Geographical Science,Inner Mongolia Normal University,Hohhot 010022,Inner Mongolia,China;
    2. Key Laboratory of Remote Sensing and Geographical Information System,Inner Mongolia Normal University,Hohhot 010022, Inner Mongolia,China;
    3. College of Ecology and Environmental Science,Inner Mongolia Agricultural University,Hohhot 010018,Inner Mongolia,China

Received date: 2015-10-27

  Revised date: 2016-02-29

  Online published: 2016-05-31

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摘要

以AMSR-2亮温数据,SPOT归一化植被指数为数据源,采用ω-τ模型和基于Qp模型的双通道反演算法,建立适用于蒙古高原表层土壤水分的反演模型。将该模型应用于2013年蒙古高原植物生长期(4—10月)表层土壤水分反演,同时分析其时空变化特征。结果表明:土壤水分反演值与实测值的Pearson相关系数为0.825,均方根误差达到了0.031 6 cm3·cm-3,反演模型具有较高精度;蒙古高原表层土壤水分平均介于0.047～0.234 cm3·cm-3,土壤水分总的空间分布格局表现出由北向南,由东北向西南逐渐减少趋势;在蒙古国北部以及内蒙古大兴安岭森林-森林草原区,土壤水分与整个研究区相比差异较大,同时在时间序列上该区域土壤水分波动较为显著。

关键词： 植物生长期; 土壤水分; 时空变化; AMSR-2; 蒙古高原

本文引用格式

魏宝成 , 银山 , 贾旭 , 包玉海 , 那日苏 , 玉山 . 蒙古高原植物生长期土壤水分时空变化特征[J]. 干旱区研究, 2016 , 33(3) : 467 -475 . DOI: 10.13866/j.azr.2016.03.03

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

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