Ice core evidence for significant 100-year regional warming on the Antarctic Peninsula
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Material Information

Title:
Ice core evidence for significant 100-year regional warming on the Antarctic Peninsula
Series Title:
Geophysical Research Letters Volume 36
Creator:
Thomas, E.R.
Dennis, P.F.
Bracegirdle, T.J.
Franzke, C.
Publisher:
American Geophysical Union
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Climate Change ( lcsh )
unknownAntarctica ( lcsh )
Ice cores ( lcsh )

Notes

Abstract:
We present a new 150-year, high-resolution, stable isotope record (d18O) from the Gomez ice core, drilled on the data sparse south western Antarctic Peninsula, revealing a 2.7 degree celsius rise in surface temperatures since the 1950s. The record is highly correlated with satellite-derived temperature reconstructions and instrumental records from Faraday station on the north west coast, thus making it a robust proxy for local and regional temperatures since the 1850s. We conclude that the exceptional 50-year warming, previously only observed in the northern Peninsula, is not just a local phenomena but part of a statistically significant 100-year regional warming trend that began around 1900. A suite of coupled climate models are employed to demonstrate that the 50 and 100 year temperature trends are outside of the expected range of variability from pre-industrial control runs, indicating that the warming is likely the result of external climate forcing. ( English )

Record Information

Source Institution:
Florida International University
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