Snow measurement by GPS interferometric reflectometry: an evaluation at Niwot Ridge, Colorado
نویسندگان
چکیده
Ethan D. Gutmann,* Kristine M. Larson, Mark W. Williams, Felipe G. Nievinski and Valery Zavorotny 1 Research Applications Lab, National Center for Atmospheric Research, Boulder, CO, USA 2 Department of Aerospace Engineering Sciences, University of Colorado, Boulder, CO, USA 3 Department of Geography and INSTAAR, University of Colorado, Boulder, CO, USA 4 Earth Systems Research Laboratory, NOAA, Boulder, CO, USA
منابع مشابه
GPS interferometric reflectometry: applications to surface soil moisture, snow depth, and vegetation water content in the western United States
GPS interferometric reflectometry is a new environmental sensing technique that can be used to measure near-surface soil moisture, snow depth, and vegetation water content variations. The spatial scale of this technique, ~1000 m, is intermediate to that of other in situ sensors (<1 m) and satellites (>100 km). Soil moisture and snow depth retrievals have accuracies of 0.04 m/m and 0.04 m, respe...
متن کاملSnow depth sensing using the GPS L2C signal with a dipole antenna
Prior research has shown that the currently deployed geodetic global positioning system (GPS) stations can be used to measure snow depth in an area around the antenna installation via GPS interferometric reflectometry (GPS-IR). Although such a technique provides the advantages of large spatial coverage and high temporal measurement sampling, there are also drawbacks in using geodetic equipment ...
متن کاملEstimating snow water equivalent for a slightly tilted snow-covered prairie grass field by GPS interferometric reflectometry
Snow water equivalent (SWE) measurements are necessary for the management of water supply and flood control systems in seasonal snow-covered regions. SWE measurements quantify the amount of water stored in snowpack; it can be estimated by the product of snow depth and density. In this paper, snow depth and density are estimated by a nonlinear least squares fitting algorithm. The inputs to this ...
متن کاملOverestimation of Snow Depth and Inorganic Nitrogen Wetfall Using Nadp Data, Niwot Ridge, Colorado
We evaluated precipitation quantity and inorganic N deposition from wetfall at the Saddle site on Niwot Ridge, an alpine location in the Colorado Front Range of the Rocky Mountains. The chemical content of precipitation was collected with an Aerometrics wet-only deposition collector and precipitation amount was collected in a co-located Fergusson-type weighing gauge with a wind shield. Calculat...
متن کاملTopographic controls on snow distribution, soil moisture, and species diversity of herbaceous alpine vegetation, Niwot Ridge, Colorado
[1] The nature of the snowpack has the potential to strongly influence the patterns of alpine plant productivity and composition by governing soil moisture levels, growing season duration and the thermal regime of alpine soils. This study evaluates these relationships by modeling the interrelationships of snow depth, snow water equivalent (SWE), snow disappearance rate, soil moisture, attribute...
متن کامل