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An Energy Budget Algorithm for a Snowpack-Snowmelt Calculation

Understanding snowmelt movement to the watershed is crucial for both climate change and hydrological studies because the snowmelt is a significant component of groundwater and surface runoff in temperature area. In this work, a new energy balance budget algorithm has been developed for melting snow from a snowpack at the Central Sierra Snow Laboratory (CSSL) in California, US. Using two sets of experiments, artificial rain-on-snow experiments and observations of diel variations, carried out in the winter of 2002 and 2003, we investigate how to calculate the amount of snowmelt from the snowpack using radiation energy and air temperature. To address the effect of air temperature, we calculate the integrated daily solar radiation energy input, and the integrated discharge of snowmelt under the snowpack and the energy required to generate such an amount of meltwater. The difference between the two is the excess (or deficit) energy input and we compare this energy to the average daily temperature. The resulting empirical relationship is used to calculate the instantaneous snowmelt rate in the model used by Lee et al. (2008a; 2010), in addition to the net-short radiation. If for a given 10 minute interval, the energy obtained by the melt calculation is negative, then no melt is generated. The input energy from the sun is considered to be used to increase the temperature of the snowpack. Positive energy is used for melting snow for the 10-minute interval. Using this energy budget algorithm, we optimize the intrinsic permeability of the snowpack for the two sets of experiments using one-dimensional water percolation model, which are 52.5×10-10 m2 and 75×10-10 m2 for the artificial rain-on-snow experiments and observations of diel variation, respectively. A new energy balance budget algorithm developed for melting snow from a snowpack

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Entry ID
KOPRI-KPDC-00000297
KPDC_AEBASSC_2011 (Old ID)
DOI
https://dx.doi.org/doi:10.22663/KOPRI-KPDC-00000297.1
Science Keyword
EARTH SCIENCE > Terrestrial Hydrosphere > Snow/Ice > Snow Melt
EARTH SCIENCE > Cryosphere > Snow/Ice > Snow Melt
ISO Topic
GEOSCIENTIFIC INFORMATION
Personnel
Jeonghoon Lee (jeonghoon.lee@kopri.re.kr)
Project
PE11090, Development of Core Technology for Ice Core Drilling and Ice Core Bank. PI.Soon Do Hur
Research period
2011-07-10 - 2011-11-01
Create/Update Date
2013-02-20 00:00:00 UTC
Dataset
An Energy Budget Algorithm for a Snowpack-Snowmelt Calculation Development of Core Technology for Ice Core Drilling and Ice Core Bank
Citation
The data(KOPRI-KPDC-00000297) used in this work was provided by the Korea Polar Research Institute.

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