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Late-Holocene East Antarctic climate trends from ice-core and lake-sediment proxies
journal contribution
posted on 2023-05-16, 12:57 authored by Roberts, D, Tasman van OmmenTasman van Ommen, Andrew McMinnAndrew McMinn, Morgan, VI, Jason RobertsJason RobertsA high-resolution record of evaporation for the last ∼650 years was derived from the diatom-salinity signal preserved in a sediment core taken from Ace Lake, Vestfold Hills (68° 28′S, 78° 11′E), Antarctica. The seasonal oxygen isotope signal preserved in an ice core from Law Dome (66° 44′S, 112° 50′E), Antarctica, revealed a high-resolution summer temperature record for the same time period. The two proxies show highly correlated behaviour despite having significantly different climatic response mechanisms and a large geographic separation. The correlation observed between proxies based on such differing processes and analytical methodologies provides not only a climate record for the past ∼650 years that is both robust and regionally representative of coastal East Antarctica but also confirmation of the utility of reconstructions using these methods.
History
Publication title
The HoloceneVolume
11Pagination
117-120ISSN
0959-6836Department/School
Institute for Marine and Antarctic StudiesPublisher
Arnold, Hodder Headline PlcPlace of publication
LondonRepository Status
- Restricted