Oct. 2013, "Surface mass balance on Fimbul ice shelf, East Antarctica: comparison of field measurements and large-scale studies†" Journal of Geophysical Research Atmospheres
"Anna Sinisalo1,*, Helgard Anschütz2, Anne Tårånd Aasen3, Kirsty Langley1, Angela von Deschwanden3, Jack Kohler3, Kenichi Matsuoka3, Svein- Erik Hamran4, Mats-Jørgen Øyan4, Elisabeth Schlosser5, Jon Ove Hagen1, Ole Anders Nøst6, Elisabeth Isaksson3
DOI: 10.1002/jgrd.50875"
"This article has been accepted for publication and undergone full peer
review but has not been through the copyediting, typesetting, pagination
and proofreading process, which may lead to differences between this
version and the Version of Record. Please cite this article as doi:
10.1002/jgrd.50875"
"Abstract"
"[1] Many
challenges remain for estimating the Antarctic ice sheet surface mass
balance (SMB), which represents a major uncertainty in predictions of
future sea-level rise. Validating continental scale studies is hampered
by the sparse distribution of in-situ data. Here we present a 26-year
mean SMB of the Fimbul ice shelf in East Antarctica between 1983–2009,
and recent interannual variability since 2010. We compare these data to
results of large-scale SMB studies for similar time periods, obtained
from regional atmospheric modeling and remote sensing. Our in-situ data
include ground penetrating radar, firn cores and mass balance stakes,
and provide information on both temporal and spatial scales. The 26-year
mean SMB on the Fimbul ice shelf varies between 170 and 620 kg m-2 a-1 giving a regional average value of 310 ±70 kg m-2 a-1.
Our measurements indicate higher long-term accumulation over large
parts of the ice shelf compared to the large-scale studies. We also show
that the variability of the mean annual SMB, which can be up to 90 %,
can be a dominant factor in short-term estimates. The results emphasize
the importance of using a combination of ground based validation data,
regional climate models and remote sensing over a relevant time period
in order to achieve a reliable SMB for Antarctica." via Hockey Schtick, via Tom Nelson
.
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