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| Titel |
Modelling annual mass balances of eight Scandinavian glaciers using statistical models |
| VerfasserIn |
M. Trachsel, A. Nesje |
| 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 ; 9, no. 4 ; Nr. 9, no. 4 (2015-07-31), S.1401-1414 |
| Datensatznummer |
250116824
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| Publikation (Nr.) |
 copernicus.org/tc-9-1401-2015.pdf |
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| Zusammenfassung |
| Mass balances of Scandinavian glaciers are mainly influenced by winter
precipitation and summer temperature. We used simple statistical models to
assess the relative importance of summer temperature and winter precipitation
for annual balances of eight glaciers in Scandinavia. Winter precipitation
was more important for maritime glaciers, whereas summer temperature was more
important for annual balances of continental glaciers. Most importantly
relative importances of summer temperature and winter precipitation were not
stable in time. For instance, winter precipitation was more important than
summer temperature for all glaciers in the 25-year period 1972–1996, whereas
the relative importance of summer temperature was increasing towards the
present. Between 1963 and 1996 the Atlantic Multidecadal Oscillation (AMO)
index was consistently negative and the North Atlantic Oscillation (NAO)
Index was consistently positive between 1987 and 1995, both being favourable
for glacier growth. Winter precipitation was more important than summer
temperature for annual balances when only considering subsets of years with
high NAO-index and negative AMO-index, respectively, whereas the importance
of summer temperature was increased analysing subsets of years with low
NAO-index and positive AMO-index, respectively. Hence, the relative
importance of precipitation and temperature for mass balances was probably
influenced by the state of the AMO and the NAO, as these two indexes are
associated with changes in summer temperature (AMO) and winter precipitation
(NAO). |
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