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SUMMARY:Variability of water isotopes in Antarctic snow and ice-core recor
 ds - Thomas Laepple\, Alfred-Wegener-Institut
DTSTART:20170404T130000Z
DTEND:20170404T140000Z
UID:TALK71815@talks.cam.ac.uk
CONTACT:Max Holloway
DESCRIPTION:Understanding the magnitude and causes of recent climatic tren
 ds and variability in Antarctica is hampered by the short and sparse instr
 umental record. Stable water isotopes in firn and ice-cores allow us to in
 fer about past climate changes. However\, the existing reconstruction effo
 rts on the East Antarctic Plateau are too uncertain to draw quantitative c
 onclusions about climate variability and potential anthropogenic trends. T
 he limited skill of the existing temperature reconstructions as well as th
 e improved understanding of the isotopic signal suggest that single firn c
 ores or even small stacks of cores are not enough to allow a quantitative 
 climate reconstruction. Instead\, extensive arrays of firn cores\, combine
 d with a statistical separation of signal and noise\, potentially suppleme
 nted by independent temperature proxies are required. \nThis seminar will 
 present our ongoing work on the relationship between climate variability a
 nd isotope variability across different time-scales from field studies\, f
 orward proxy modelling and theoretical considerations and their implicatio
 ns for the interpretation of water isotope records. 
LOCATION:British Antarctic Survey\, Innovation Centre\, Seminar Room 2
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