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The impact of vertical measurement depth on the information content of soil moisture times series data
Qiu, Jianxiu(邱建秀); Crow, Wade T.; Nearing, Grey S.; Mo, Xingguo; Liu, Suxia
2014
Source PublicationGEOPHYSICAL RESEARCH LETTERS
Volume41Issue:14Pages:4997-5004
Abstract

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 (theta(0-60) ([cm])) not present in either superficial soil moisture observations (theta(5) ([cm])) or a simple low-pass transformation of theta(5). Results suggest that while theta(0-60) is indeed more valuable than theta(5) for predicting near-future vegetation anomalies, the enhanced information content in theta(0-60) soil moisture can be effectively duplicated by the low-pass transformation of theta(5). This implies that, for drought monitoring applications, the shallow vertical penetration depth of microwave-based theta(5) retrievals does not represent as large a practical limitation as commonly perceived.

Indexed BySCI
Funding OrganizationNatural Science Foundation of China 31171451;Key Project for the Strategic Science Plan in IGSNRR, CAS 2012ZD003;Chinese Scholarship Council;NASA Terrestrial Ecology Program NNH09ZDA001N
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/29235
Collection研究生部
Recommended Citation
GB/T 7714
Qiu, Jianxiu,Crow, Wade T.,Nearing, Grey S.,et al. The impact of vertical measurement depth on the information content of soil moisture times series data[J]. GEOPHYSICAL RESEARCH LETTERS,2014,41(14):4997-5004.
APA Qiu, Jianxiu,Crow, Wade T.,Nearing, Grey S.,Mo, Xingguo,&Liu, Suxia.(2014).The impact of vertical measurement depth on the information content of soil moisture times series data.GEOPHYSICAL RESEARCH LETTERS,41(14),4997-5004.
MLA Qiu, Jianxiu,et al."The impact of vertical measurement depth on the information content of soil moisture times series data".GEOPHYSICAL RESEARCH LETTERS 41.14(2014):4997-5004.
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