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Multi-profile analysis of soil moisture within the US Climate Reference Network

E. J. Coopersmith, M. H. Cosh, J. E. Bell and W. T. Crow
Multi-profile analysis of soil moisture within the US Climate Reference Network
Vadose Zone Journal (January 2016) 15 (1)


Soil moisture estimates are crucial for hydrologic modeling and agricultural decision-support efforts. These measurements are also pivotal for long-term inquiries regarding the impacts of climate change and the resulting droughts over large spatial and temporal scales. However, it has only been the past decade during which ground-based soil moisture sensory resources have become sufficient to tackle these important challenges. Despite this progress, random and systematic errors remain in ground-based soil moisture observations. Such errors must be quantified (and/or adequately minimized) before such observations can be used with full confidence. In response, this paper calibrates and analyzes US Climate Reference Network (USCRN) profile estimates at each of three sensors collocated at each USCRN location. With each USCRN location consisting of three independent, Hydraprobe measurements, triple collocation analysis of these sensory triads reveals the random error associated with this particular sensing technology in each individual location. This allows quantification of the accuracy of these individual profiles, the random errors associated with these measurements in different geographic locations, and offers the potential for more adept quality control procedures in near real time. Averaged over USCRN gauge locations nationally, this random error is determined to be approximately 0.012 m (super 3) /m (super 3) .

ISSN: 1539-1663
Serial Title: Vadose Zone Journal
Serial Volume: 15
Serial Issue: 1
Title: Multi-profile analysis of soil moisture within the US Climate Reference Network
Affiliation: U. S. Department of Agriculture, Hydrology and Remote Sensing Laboratory, Beltsville, MD, United States
Published: 201601
Text Language: English
Publisher: Soil Science Society of America, Madison, WI, United States
Number of pages: 8
References: 25
Accession Number: 2016-016625
Categories: Environmental geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, sketch map
Secondary Affiliation: Cooperative Institute for Climate and Satellites, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201609
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