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Ecosystem-scale measurements of biomass water using cosmic ray neutrons

Franz, Trenton E. and Zreda, Marek and Rosolem, Rafael and Hornbuckle, Brian K. and Irvin, Samantha L. and Adams, Henry and Kolb, Thomas E. and Zweck, Chris and Shuttleworth, W. James (2013) Ecosystem-scale measurements of biomass water using cosmic ray neutrons. Geophysical Research Letters, 40 (15). pp. 3929-3933. ISSN 1944-8007


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Publisher’s or external URL: http://dx.doi.org/10.1002/grl.50791


Accurate estimates of biomass are imperative for understanding the global carbon cycle. However, measurements of biomass and water in the biomass are difficult to obtain at a scale consistent with measurements of mass and energy transfer, ~1 km, leading to substantial uncertainty in dynamic global vegetation models. Here we use a novel cosmic ray neutron method to estimate a stoichiometric predictor of ecosystem-scale biomass and biomass water equivalent over tens of hectares. We present two experimental studies, one in a ponderosa pine forest and the other in a maize field, where neutron-derived estimates of biomass water equivalent are compared and found consistent with direct observations. Given the new hectometer scale of nondestructive observation and potential for continuous measurements, we anticipate this technique to be useful to many scientific disciplines.

Item Type: Article
Publisher’s Statement: ©2013. American Geophysical Union. All Rights Reserved.
ID number or DOI: 10.1002/grl.50791
Keywords: Carbon cycling; Land/atmosphere interactions; Eco-hydrology; Instruments and techniques: monitoring; Instruments useful in three or more fields; biomass; carbon; cosmic ray neutrons; forests; growth; large scale; LiDAR; soil-moisture
Subjects: Q Science > QC Physics
Q Science > QH Natural history
NAU Depositing Author Academic Status: Faculty/Staff
Department/Unit: College of Engineering, Forestry, and Natural Science > School of Forestry
Date Deposited: 12 Oct 2015 16:33
URI: http://openknowledge.nau.edu/id/eprint/729

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