Snow surface energy exchanges and snowmelt in a shrub-covered bog in eastern Ontario, Canada

摘要: The objectives of this study were to measure and evaluate the energy balance a snowpack in northern peatland, with particular emphasis on ground heat flux (G), performance point mass snowmelt model (SNOBAL) peatland ecosystems. G is typically considered small component (EB) when compared radiative turbulent fluxes. However, environments where soil temperature remains above freezing throughout winter, may be an important input snowpack. For direct assessment role snow budget such environment, EB components at Mer Bleue bog, directly measured modelled using SNOBAL during 2009–2010 winter. When integrated over pre-melt period, simulated proved large contributor (25%). Net radiation somewhat under-predicted by SNOBAL, whereas fluxes (especially latent LE) considerably over-predicted. calculated was found sensitive gradient between lower layer snowpack, parameterization chosen estimate roughness lengths for water vapour. Copyright © 2012 John Wiley & Sons, Ltd.