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| Titel |
Interpreting ice core records of inter-annual temperature change across the Antarctic Peninsula |
| VerfasserIn |
L. Sime, G. Marshall |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250021119
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| Zusammenfassung |
| The Antarctica Peninsula has a rapidly changing climate, however there is a paucity of long
term meterological observations of temperature across the region. Decadal to centennial ice
cores records can potentially help to fill this gap. Interpretation of the ice cores requires an
understanding of the relationship between temperature change and the accumulation record
recovered from each Peninsula core site. To facilitate this interpretation, we present an
analysis of 22 years (1980-2002) of ECMWF ERA40 surface temperature, precipitation, and
accumulation data. Inter-annual variability in temperature is quite is similar across the
Peninsula. However, changes in the covariance between accumulation and temperature
over the Peninsula region at the seasonal and synoptic time periods strongly affect
the potential ice core recording of temperature change: with a clear trend in the
fraction of inter-annual temperature change recorded along the Peninsula. It is likely
that only about 25% of the actual inter-annual temperature change will be visible
in the accumulation record at the northern end of the Peninsula near James Ross
Island, 70% at Dyer in the central regions, and 120% at the southern end in the
Gomez region. This study is likely to facilitate understand of decadal to centennial
temperature change obtained from stable water isotopes in this sensitive polar region. |
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