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Cloud effects on the surface energy and mass balance of Brewster Glacier, New Zealand

J. Conway,N. Cullen

Published 2015 in The Cryosphere Discussions

ABSTRACT

A study of the impact of cloud cover on the surface energy and mass balance for an in situ station on Brewster Glacier, New Zealand was conducted. Used measurements of atmospheric variables, fluxes, snow depth and density, in conjunction with a surface mass balance model to study the effects of clouds. They conduct a model sensitivity study to examine how clouds affect the sensitivity of SMB to air temperature. They find that for this location, clouds dramatically affect the SEB, and enhance the frequency, and to a lesser extent the magnitude of melting, primarily by changing the direction of net longwave radiation at the surface. A sensitivity study suggests that under cloudy conditions, SMB is more sensitive to fluctuations in temperature. The authors argue that the importance of clouds and atmospheric moisture should be recognized when studying glacier climate interactions.

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