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	Spatial variability of soil moisture at typical alpine meadow and steppe sites in the Qinghai-Tibetan Plateau permafrost region
	Yang Z. P. ; Hua O. Y. ; Zhang X. Z. ; Xu X. L. ; Zhou C. P. ; Yang W. B.
	2011
关键词	Soil moisture Spatial heterogeneity Semivariogram Permafrost Qinghai-Tibet Plateau water content china shapotou area
英文摘要	Permafrost degradation has the potential to significantly change soil moisture. The objective of this study was to assess the variability of soil moisture in a permafrost region using geostatistical techniques. The experiment was conducted in August 2008 in alpine steppe and meadow located in the Qinghai-Tibetan Plateau permafrost region. Four soil depths (0-10, 10-20, 20-30 and 30-40 cm) were analyzed using frequency domain reflectometry, and sampling made of 80 points in a 10 m x 10 m grid were sampled. Soil moisture was analyzed using classical statistics to appropriately describe central tendency and dispersion, and then using geostatistics to describe spatial variability. Classical statistical method indicated that soil moisture in the permafrost region had a normal distribution pattern. Mean surface soil moisture in alpine meadow was higher than that in alpine steppe. The semivariograms showed that soil moisture variability in alpine cold steppe was larger than that in alpine meadow, which decreased with depths. Nugget values in alpine steppe were low (0.1-4.5), in contrast to alpine cold meadow. Soil moisture in alpine steppe had highly structured spatial variability with more than 93.4% spatial heterogeneity, and the range decreased with depth. Soil moisture content in alpine cold meadow had a moderate spatial dependence with a range of 51.3-169.2 m, increasing with depth.
出处	Environmental Earth Sciences
卷	63
期	3
页	477-488
收录类别	SCI
语种	英语
ISSN号	1866-6280
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/22562]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Yang Z. P.,Hua O. Y.,Zhang X. Z.,et al. Spatial variability of soil moisture at typical alpine meadow and steppe sites in the Qinghai-Tibetan Plateau permafrost region. 2011.

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