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Environmental processes affecting the temporal and spatial variabilities of snowmelt in the Ben Lomond ski field area, Tasmania

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Faulkner, Peter Stuart (1987) Environmental processes affecting the temporal and spatial variabilities of snowmelt in the Ben Lomond ski field area, Tasmania. Research Master thesis, University of Tasmania.

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Abstract

Studies were pursued in the snowfields of Ben Lomond in
north-eastern Tasmania to establish the environmental
factors affecting snowmelt. The approach through temporal
and spatial analysis of ablation, was built upon a five
year study of the climate which commenced in 1981. This
was accompanied by an intensive measurement period in July
to October, 1986.
Climatic results indicated that the highest and most
consistent rates of snowmelt were associated with a mean
rise in the daily air temperature and a reduction in snowfall
days towards the end of September. The days of
strongest melt were most commonly accompanied by northwesterly
winds generating regional advection. As the
snowfield boundaries decreased, local advective forces
enhanced heat available for melt.
The three dominant terms in the energy balance over snow
were, in order of importance, net radiation, sensible and
latent heat. Other, terms investigated, including heat from
rain, the ground and internal energy, were of minor significance
in providing energy for melt. The importance of any
one term was observed to depend upon the prevailing synoptic
situation. The seasonal changes in the energy balance were
reflected in temporal variations in snowmelt. The spatial
variability in snowmelt was not adequately described by
variations in the energy balance. The differences could
be explained by local characteristics in groundcover and
topography.
Snow melted most slowly in grassed gullies lying under
steep southward facing slopes above an altitude of 1500
metres. Within the study area, the rock domes and ridges
which had the most easterly aspect and were below 1500
metres lost their snowcover first.

Item Type: Thesis (Research Master)
Keywords: Snow
Copyright Holders: The Author
Copyright Information:

Copyright 1987 the Author - The University is continuing to endeavour to trace the copyright
owner(s) and in the meantime this item has been reproduced here in good faith. We
would be pleased to hear from the copyright owner(s).

Additional Information:

Thesis (M.Sc.)--University of Tasmania, 1989. Bibliography: leaves 116-123

Date Deposited: 08 Dec 2014 23:58
Last Modified: 11 Mar 2016 05:55
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