The impact of vertical measurement depth on the information content of soil moisture times series data

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	The impact of vertical measurement depth on the information content of soil moisture times series data
	Liu Suxia; Mo Xingguo
	2014
关键词	Soil moisture Drought
英文摘要	Using a decade of ground-based soil moisture observations acquired from the United States Department of Agriculture's Soil Climate Analysis Network (SCAN), we calculate the mutual information (MI) content between multiple soil moisture variables and near-future vegetation condition to examine the existence of emergent drought information in vertically integrated (surface to 60 cm) soil moisture observations (0-60 [cm]) not present in either superficial soil moisture observations (5 [cm]) or a simple low-pass transformation of 5. Results suggest that while 0-60 is indeed more valuable than 5 for predicting near-future vegetation anomalies, the enhanced information content in 0-60 soil moisture can be effectively duplicated by the low-pass transformation of 5. This implies that, for drought monitoring applications, the shallow vertical penetration depth of microwave-based 5 retrievals does not represent as large a practical limitation as commonly perceived. 2014. American Geophysical Union. All Rights Reserved.
出处	Geophysical Research Letters
卷	41 期:14 页:4997-5004
收录类别	EI
语种	英语
内容类型	EI期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/31342]
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	Liu Suxia,Mo Xingguo. The impact of vertical measurement depth on the information content of soil moisture times series data. 2014.