there are multiple past periods of warmer than current temperatures when low atmospheric CO2 levels existed. Empirical evidence, such as the Greenland ice cores, point to three specific Holocene periods of ancient historical warming: the Minoan, the Roman, and the Medieval eras.
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#geoubcsic Pattern and timing of the northwestern Barents Sea Ice Sheet deglaciation and indications of episodic Holocene deposition. Rüther, D.C.; Bjarnadóttir, L.R.; Junttila, J.; Husum, K.; Rasmussen, T.L.; Lucchi, R.G.; Andreassen, K. BOREAS V.41(3):494-512. . The origin of two acoustic sediment units has been studied based on lithological facies, chronology and benthic stable isotope values as well as on foraminifera and clay mineral assemblages in six marine sediment cores…
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#geoubcsic Late Holocene foraminifera of Blake Ridge diapir: Assemblage variation and stable-isotope record in gas-hydrate bearing sediments. Panieri, G; Aharon, P; Sen Gupta, BK; Camerlenghi, A; Ferrer, FP; Cacho, I. MARINE GEOLOGY V.353:99-107. . The presence of gas hydrates on the Blake Ridge diapir, northeastern Atlantic Ocean, offers an opportunity to study the impact of methane seepage on the ecology and geochemistry of benthic foraminifera in the late Holocene. Three push cores…