Snow water equivalent measurement in the Arctic based on cosmic ray neutron attenuation
<p>Grounded in situ, or invasive, cosmic ray neutron sensors (CRNSs) may allow for continuous, unattended measurements of snow water equivalent (SWE) over complete winter seasons and allow for measurements that are representative of spatially variable Arctic snow covers, but few studies have t...
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| Autores principales: | , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Copernicus Publications
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/34b7a8c39afc41c8bf6307dfafe7e462 |
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| Sumario: | <p>Grounded in situ, or invasive, cosmic ray neutron sensors (CRNSs)
may allow for continuous, unattended measurements of snow water equivalent
(SWE) over complete winter seasons and allow for measurements that are
representative of spatially variable Arctic snow covers, but few studies
have tested these types of sensors or considered their applicability at
remote sites in the Arctic. During the winters of 2016/2017 and 2017/2018 we
tested a grounded in situ CRNS system at two locations in Canada: a cold,
low- to high-SWE environment in the Canadian Arctic and at a warm, low-SWE
landscape in southern Ontario that allowed easier access for validation
purposes. Five CRNS units were applied in a transect to obtain continuous
data for a single significant snow feature; CRNS-moderated
neutron counts were compared to manual snow survey SWE values obtained
during both winter seasons. The data indicate that grounded in situ CRNS
instruments appear able to continuously measure SWE with sufficient accuracy
utilizing both a linear regression and nonlinear formulation. These sensors can provide
important SWE data for testing snow and hydrological models, water resource
management applications, and the validation of remote sensing applications.</p> |
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