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Late-Holocene East Antarctic climate trends from ice-core and lake-sediment proxies
journal contributionposted on 2023-05-16, 12:57 authored by Roberts, D, Tasman van OmmenTasman van Ommen, Andrew McMinnAndrew McMinn, Morgan, VI, Jason RobertsJason Roberts
A high-resolution record of evaporation for the last âˆ¼650 years was derived from the diatom-salinity signal preserved in a sediment core taken from Ace Lake, Vestfold Hills (68Â° 28â€²S, 78Â° 11â€²E), Antarctica. The seasonal oxygen isotope signal preserved in an ice core from Law Dome (66Â° 44â€²S, 112Â° 50â€²E), 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 âˆ¼650 years that is both robust and regionally representative of coastal East Antarctica but also confirmation of the utility of reconstructions using these methods.
Publication titleThe Holocene
Department/SchoolInstitute for Marine and Antarctic Studies
PublisherArnold, Hodder Headline Plc
Place of publicationLondon