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    黄河源区植被对活动层温度和水分的影响

    罗栋梁 金会军 何瑞霞 杨思忠

    罗栋梁, 金会军, 何瑞霞, 杨思忠, 2014. 黄河源区植被对活动层温度和水分的影响. 地球科学, 39(4): 421-430. doi: 10.3799/dqkx.2014.040
    引用本文: 罗栋梁, 金会军, 何瑞霞, 杨思忠, 2014. 黄河源区植被对活动层温度和水分的影响. 地球科学, 39(4): 421-430. doi: 10.3799/dqkx.2014.040
    Luo Dongliang, Jin Huijun, He Ruixia, Yang Sizhong, 2014. Responses of Surface Vegetation on Soil Temperature and Moisture of the Active Layer in the Source Area of the Yellow River. Earth Science, 39(4): 421-430. doi: 10.3799/dqkx.2014.040
    Citation: Luo Dongliang, Jin Huijun, He Ruixia, Yang Sizhong, 2014. Responses of Surface Vegetation on Soil Temperature and Moisture of the Active Layer in the Source Area of the Yellow River. Earth Science, 39(4): 421-430. doi: 10.3799/dqkx.2014.040

    黄河源区植被对活动层温度和水分的影响

    doi: 10.3799/dqkx.2014.040
    基金项目: 

    国家自然科学基金 41301068

    国家自然科学基金 41121061

    全球变化研究国家重大科学研究计划项目 2010CB951402

    中国科学院寒区旱区环境与工程研究所青年人才基金项目 Y252J41001

    冻土工程国家重点实验室自主青年课题 SKLFSE-ZQ-18

    详细信息
      作者简介:

      罗栋梁(1983-),男,助理研究员,主要从事多年冻土和气候变化研究工作.E-mail: luodongliang@lzb.ac.cn

    • 中图分类号: P642.14

    Responses of Surface Vegetation on Soil Temperature and Moisture of the Active Layer in the Source Area of the Yellow River

    • 摘要: 植被和活动层水热关系是青藏高原冻土生态环境的重要组成部分,对气候变化和工程活动积极响应,是目前全球变化研究的热点之一.为了解植被差异对活动层水热过程的影响,以场地监测和植被调查数据为基础,分析了黄河源区高温高海拔多年冻土区同一地貌单元内局地条件相似而植被差异显著的3个场地活动层温度和水分变化.初步结果表明:植被盖度较低时,活动层水分含量也低,且含水量高值区趋于中下部;植被盖度较高时,冷季地气温差和温度位移都减小,暖季地气温差增大;随着植被盖度增大,冻融开始和结束时间明显滞后,冻融持续时间延长.初步揭示了黄河源区地表植被对活动层水分和温度的影响过程,对研究和保护高寒生态环境稳定具有重要意义.

       

    • 图  1  黄河源区地理地貌

      Fig.  1.  Geomorphological characteristics of the sources areas of the Yellow River

      图  2  麻多乡2011、2012年气温和降水变化

      Fig.  2.  Air temperature and rainfall in 2011 and 2012 in Maduo site

      图  3  MDX1、MDX2、MDX3场地岩性及探头布设

      Fig.  3.  The lithology, temperature and moisture probes of Sites MDX1, MDX2, MDX3

      图  4  MDX1、MDX2、MDX3场地的气温(Ta)和地面温度(5 cm)在2010—2011年的逐日变化(a)和在2011年的逐月变化(b)

      Fig.  4.  Daily changes in 2010—2011(a) and monthly changes in 2011 (b) of air temperature and ground surface temperature (5 cm) at sites MDX1, MDX2 and MDX3

      图  5  MDX1、MDX2、MDX3活动层年平均温度沿深度分布

      Fig.  5.  Ground temperature profiles of active layer in MDX1, MDX2 and MDX3

      图  6  不同植被盖度下活动层冻融过程

      a.MDX1;b.MDX2;c.MDX3

      Fig.  6.  Freezing/thawing processes under different vegetation conditions

      图  7  黄河源区麻多乡活动层土壤体积水百分含量及其变化

      Fig.  7.  Soil volumetric water content of the active layer in Maduo town in the sources areas of the Yellow River

      表  1  黄河源区麻多乡场地植被特征

      Table  1.   Vegetation characteristics in Maduo sites in the sources areas of the Yellow River

      场地编号 优势种 主要伴生种 植被盖度(%) 丰富度 地上生物量(g·m-2) 土壤质地
      MDX1 藏嵩草 线叶嵩草、黑穗苔草、矮嵩草、毛茛、龙胆、虎尾草、火绒草、黄芪等 83 13 370.3 中粗砂
      MDX2 矮嵩草 早熟禾、小嵩草、苔草、香青、棘豆、龙胆、沙生风毛菊、毛茛等 25 18 46.4 粉土、粉砂
      MDX3 小嵩草 矮嵩草、火绒草、芸香叶唐松草、雪白委陵菜、早熟禾、棘豆、苔草、沙生风毛菊、垂头菊等 60 8 94.5 红褐砂粘土和砾石
      下载: 导出CSV
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