Deglacial sea-level record from Tahiti corals and the timing of global meltwater discharge
Article Abstract:
Fossil corals from Tahiti provide evidence of a large sea-level jump approximately 13,800 calendar years before present (BP). This corresponds to meltwater pulse 1A in the Barbados coral records. The Tahiti record shows a coincidence between the meltwater pulse and an intense cooling event that followed the commencement of the Bolling-Allerod warm period, but preceded the Younger Dryas cold event by approximately 1,000 years. The Tahiti corals are quite distant from plate boundaries and sufficiently remote from the locations of large former ice sheets. These corals may be tectonically more stable than those in the Barbados.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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High concentration of atmospheric 14C during the Younger Dryas cold episode
Article Abstract:
The atmospheric radiocarbon ratio is sensitive to changes in the other global carbon cycle reservoirs and so the high 14C concentration in the atmosphere from the Younger Dryas period indicates a significant change. Sediments from Lake Gosciaz in Poland are used to trace climate changes and atmospheric radiocarbon for the Younger Dryas and early Holocene periods. The evidence suggests that the deep ocean ventilation rate decreased during the Younger Dryas, accounting for the high 14C concentration, most likely due to a reduced formation intensity of North Atlantic Deep Water.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Variations of Younger Dryas atmospheric radiocarbon explicable without ocean circulation changes
Article Abstract:
A high-resolution reconstruction of atmospheric radiocarbon concentrations from sediments of two Polish lakes, is presented. The records suggest that the maximum in atmospheric radio-carbon concentrations in the early Younger Dryas was less than previously thought and may have been due to solar activity variations.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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