Temperature thresholds for degree‐day modelling of Greenland ice sheet melt rates

Michiel van den Broeke; Carlijn Bus; Janneke  Ettema; Paul Smeets

doi:10.1029/2010GL044123

Temperature thresholds for degree‐day modelling of Greenland ice sheet melt rates

Michiel van den Broeke, Carlijn Bus, Janneke Ettema, Paul Smeets

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Abstract

Degree‐day factors (DDFs) are calculated for the ice sheet ablation zone in southwest Greenland, using measurements of automatic weather stations and a regional atmospheric climate model. The rapid increase of DDFs for snow and ice towards higher elevations is caused by the increasing dominance of short daytime melting and nocturnal refreezing. This spatial inhomogeneity can be avoided by choosing a lower threshold for daily average 2 m air temperature (268 K instead of 273.15 K) for the degree‐day calculation.

Original language	English
Article number	L18501
Number of pages	5
Journal	Geophysical research letters
Volume	37
Issue number	18
DOIs	https://doi.org/10.1029/2010GL044123
Publication status	Published - 2010

Keywords

METIS-304365
ITC-ISI-JOURNAL-ARTICLE

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VandenBroeke2010temperatureFinal published version, 797 KB

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abstract = "Degree‐day factors (DDFs) are calculated for the ice sheet ablation zone in southwest Greenland, using measurements of automatic weather stations and a regional atmospheric climate model. The rapid increase of DDFs for snow and ice towards higher elevations is caused by the increasing dominance of short daytime melting and nocturnal refreezing. This spatial inhomogeneity can be avoided by choosing a lower threshold for daily average 2 m air temperature (268 K instead of 273.15 K) for the degree‐day calculation.",

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AU - van den Broeke, Michiel

AU - Bus, Carlijn

AU - Ettema, Janneke

AU - Smeets, Paul

PY - 2010

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AB - Degree‐day factors (DDFs) are calculated for the ice sheet ablation zone in southwest Greenland, using measurements of automatic weather stations and a regional atmospheric climate model. The rapid increase of DDFs for snow and ice towards higher elevations is caused by the increasing dominance of short daytime melting and nocturnal refreezing. This spatial inhomogeneity can be avoided by choosing a lower threshold for daily average 2 m air temperature (268 K instead of 273.15 K) for the degree‐day calculation.

KW - METIS-304365

KW - ITC-ISI-JOURNAL-ARTICLE

UR - https://ezproxy2.utwente.nl/login?url=https://webapps.itc.utwente.nl/library/2010/isi/ettema_tem.pdf

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JO - Geophysical research letters

JF - Geophysical research letters

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M1 - L18501

ER -

Temperature thresholds for degree‐day modelling of Greenland ice sheet melt rates

Abstract

Keywords

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