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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Citation (5) Types Journal Citation (2) Contacts Landry, Christopher C Painter, Thomas H Clark, Martyn P Hay, Lauren E Leavesley, George H More... Categories Publication (5) View Results as: JSON ATOM CSV

Interannual Variability in Radiative Forcing and Snowmelt Rates by Desert Dust in Snowcover in the Colorado River Basin Dust in snow accelerates snowmelt through its direct reduction of albedo and its further reduction of albedo by accelerating the growth of snow effective grain size. Since the Anglo expansion and disturbance of the western US that began in the mid 19th century, the mountain snow cover of the Colorado River Basin has been subject to five-fold greater dust loading. This research expands on the work done in Painter et al. (2007) by assessing the interannual variability in radiative forcing, melt rates, and shortening of snow cover duration from 2005 to 2010, and the relative response of melt rates to simulated increases in air temperature. We ran the SNOBAL snowmelt model over the 6 year energy balance record at the... Categories: Publication; Types: Citation, Journal Citation; Tags: AGU Fall Meeting Abstracts, Atmospheric composition and structure, cryoshere, energy balance, modeling, All tags... snowmelt, Fewer tags Impact of disturbed desert soils on duration of mountain snow cover Snow cover duration in a seasonally snow covered mountain range (San Juan Mountains, USA) was found to be shortened by 18 to 35 days during ablation through surface shortwave radiative forcing by deposition of disturbed desert dust. Frequency of dust deposition and radiative forcing doubled when the Colorado Plateau, the dust source region, experienced intense drought (8 events and 39?59 Watts per square meter in 2006) versus a year with near normal precipitation (4 events and 17?34 Watts per square meter in 2005). It is likely that the current duration of snow cover and surface radiation budget represent a dramatic change from those before the widespread soil disturbance of the western US in the late 1800s that... Categories: Publication; Types: Citation, Journal Citation; Tags: American Geophysical Union, Geophysical Research Letters, dust, radiative forcing, snowmelt Assimilation of snow covered area information into hydrologic and land-surface models This paper describes a data assimilation method that uses observations of snow covered area (SCA) to update hydrologic model states in a mountainous catchment in Colorado. The assimilation method uses SCA information as part of an ensemble Kalman filter to alter the sub-basin distribution of snow as well as the basin water balance. This method permits an optimal combination of model simulations and observations, as well as propagation of information across model states. Sensitivity experiments are conducted with a fairly simple snowpack/water-balance model to evaluate effects of the data assimilation scheme on simulations of streamflow. The assimilation of SCA information results in minor improvements in the accuracy... Categories: Publication; Types: Citation; Tags: Snow data assimilation, Stochastic hydrology, Uncertainty Mountain System Observatory & Research at Senator Beck Basin, San Juan Mountains, Southwest Colorado Mountain System Observatory & Research at Senator Beck Basin, San Juan Mountains, Southwest Colorado, credited to Landry, Christopher C, published in 2007. Categories: Publication; Types: Citation Assimilation of snow covered area information into hydrologic and land-surface models This paper describes a data assimilation method that uses observations of snow covered area (SCA) to update hydrologic model states in a mountainous catchment in Colorado. The assimilation method uses SCA information as part of an ensemble Kalman filter to alter the sub-basin distribution of snow as well as the basin water balance. This method permits an optimal combination of model simulations and observations, as well as propagation of information across model states. Sensitivity experiments are conducted with a fairly simple snowpack/water-balance model to evaluate effects of the data assimilation scheme on simulations of streamflow. The assimilation of SCA information results in minor improvements in the accuracy... Categories: Publication; Types: Citation; Tags: Snow data assimilation, Stochastic hydrology, Uncertainty