نتایج جستجو برای: determining boundaries snow the

تعداد نتایج: 16072425  

2014
Jean Espinoza Jorge Arigony-Neto Daniel Capella Zanotta

This paper presents an inverse model for SAR backscatter X band designed to snow and ice surfaces. The model inversion enables estimating the morphological characteristics of snow cover from SAR data. X Cosmo-Skymed sensor data was used in the experiment tested here for the region of Union Glacier Antarctica. We observed a precision in determining the estimated size of snow grains about 94%. Th...

Journal: :Remote Sensing 2015
Chuck Lindsay Jiang Zhu Amy E. Miller Peter Kirchner Tammy L. Wilson

Moderate Resolution Imaging Spectroradiometer (MODIS) daily snow cover products provide an opportunity for determining snow onset and melt dates across broad geographic regions; however, cloud cover and polar darkness are limiting factors at higher latitudes. This study presents snow onset and melt dates for Alaska, portions of western Canada and the Russian Far East derived from Terra MODIS sn...

Journal: :IEEE Trans. Geoscience and Remote Sensing 1999
Nerijus Kruopis Jaan Praks Ali Nadir Arslan Hanna M. Alasalmi Jarkko Koskinen Martti Hallikainen

Airborne passive-microwave signatures collected in Northern Finland during EMAC-95 are analyzed with the emphasis on forested areas and dry snow conditions. The microwave signatures cover the 6.8–18.7-GHz frequency range and were acquired at both vertical and horizontal polarizations. The analysis is carried out with respect to the forest-stem volume data and comprises three different snow-dept...

2007
Xiaobing Zhou Shusun Li Kim Morris Martin O. Jeffries

[1] Surface all-wave albedo and physical parameters (grain radius, mass density, surface temperature, and stratification) of an austral summer snow cover on sea ice were measured in the Ross Sea during January-February 1999. It was observed that (1) from north to south the snow surface temperature decreases, albedo increases, snow mass density decreases, snow composite grain radius decreases, a...

Journal: :Journal of animal science 1980
B A Young A A Degen

Tritiated water was evaluated and used for determining snow and water intake by cattle. This method yielded results comparable to those obtained via simultaneous gravimetric measurement of snow and liquid water intake after adjustments were made for preformed and metabolic water from feed; the correlation coefficient was .96 and the standard error of the estimate was +/- 1.28 kg/day, or +/- 5.8...

Journal: :The Journal of the Acoustical Society of America 1994

Journal: :Environmental science & technology 2008
Thomas A Douglas Matthew Sturm William R Simpson Joel D Blum Laura Alvarez-Aviles Gerald J Keeler Donald K Perovich Abir Biswas Kelsey Johnson

Mercury is deposited to the Polar Regions during springtime atmospheric mercury depletion events (AMDEs) but the relationship between snow and ice crystal formation and mercury deposition is not well understood. The objective of this investigation was to determine if mercury concentrations were related to the type and formation of snow and ice crystals. On the basis of almost three hundred anal...

2012
H. J. Oldroyd H. Huwald

Please cite this article in press as: Oldroyd HJ et http://dx.doi.org/10.1016/j.advwatres.2012.06.0 Thermal diffusivity of snow is an important thermodynamic property associated with key hydrological phenomena such as snow melt and heat and water vapor exchange with the atmosphere. Direct determination of snow thermal diffusivity requires coupled point measurements of thermal conductivity and d...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید