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| Titel |
Snow on the Ross Ice Shelf: comparison of reanalyses and observations from automatic weather stations |
| VerfasserIn |
L. Cohen, S. Dean |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 7, no. 5 ; Nr. 7, no. 5 (2013-09-16), S.1399-1410 |
| Datensatznummer |
250085156
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| Publikation (Nr.) |
 copernicus.org/tc-7-1399-2013.pdf |
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| Zusammenfassung |
| Snow accumulation measurements from automatic weather stations (AWS) around
the Ross Ice Shelf (RIS), Antarctica, are used to provide a new set of
ground-based observations which are compared to precipitation from the ECMWF
ERA-Interim and NCEP/NCAR Reanalysis-2 datasets. The high temporal
resolution of the AWS snow accumulation measurements allow for an
event-based comparison of reanalyses precipitation to the in situ
observations. Snow accumulation records from nine AWS provide multiple years
of accumulation data between 2008 and 2012 over a relatively large, homogeneous
region of Antarctica, and also provide the basis for a statistical evaluation of
accumulation and precipitation events. The complex effects of wind on snow
accumulation (which can both limit and enhance accumulation) complicate the
use of the accumulation measurements, but this analysis shows that they can
provide a valuable source of ground-based observations for comparisons to
modelled precipitation on synoptic timescales. The analysis shows that
ERA-Interim reproduces more precipitation events than NCEP-2, and these
events correspond to an average 8.2% more precipitation. Significant
correlations between reanalyses and AWS event sizes are seen at several
stations and show that ERA-Interim consistently produces larger
precipitation events than NCEP-2. |
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