宇宙射线土壤水分观测方法在黄土高原草地植被的应用
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国家自然科学基金重大项目(41390463)资助


Application of cosmic-ray method to soil moisture measurement of grassland in the loess plateau
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    摘要:

    宇宙射线土壤水分观测系统(COSMOS)是一种测量直径达600 m以上表层土壤平均含水量的新型土壤水分测量仪器。在黄土高原一片草地植被上测试COSMOS仪器测量土壤水分的效果,并与烘干法及HydraProbe II土壤湿度传感器测量结果进行比较。结果表明,COSMOS测量结果与烘干法结果一致性好;与HydraProbe II点尺度测量结果存在不同时间段的差别,暗示了黄土高原土壤水分空间变异性及其时间变化。COSMOS仪器能够很好地测量黄土高原破碎表面观测范围内表层平均土壤含水量,并为研究土壤含水量的空间变异性提供了潜在工具。

    Abstract:

    Cosmic-ray Soil Moisture Observing System (COSMOS) is a newly-developed cosmic-ray instrument for measuring average surface soil moisture content over an area with more than 600 m in diameter. A field test was conducted of using this instrument to measure surface soil moisture content in a tract of grassland in the Loess Plateau, and comparison was made of the results of the field test with the results of the oven-drying method, and of the point scale measurement with the HydraProbe II sensors. It was found that the measurements using the COSMOS method were well in agreement with those using the oven-drying method, but differed from those using HydraProbe II sensors in some time spans, suggesting that soil moisture content in the Loess Plateau was subject to spatio-temporal variability. The COSMOS instrument offers an effective approach to measurement of area-average surface soil moisture content in the Loess Plateau with fragmented surface, and a potential tool for studying spatial variability of soil moisture content in the Loess Plateau.

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赵 纯,袁国富,邵明安,易小波,刘 晓.宇宙射线土壤水分观测方法在黄土高原草地植被的应用[J].土壤学报,2015,52(6):1438-1444. DOI:10.11766/trxb201503110122 Zhao Chun, Yuan Guofu, Shao Mingan, Yi Xiaobo, Liu Xiao. Application of cosmic-ray method to soil moisture measurement of grassland in the loess plateau[J]. Acta Pedologica Sinica,2015,52(6):1438-1444.

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  • 收稿日期:2015-03-11
  • 最后修改日期:2015-05-20
  • 录用日期:2015-07-16
  • 在线发布日期: 2015-08-31
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