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Oxygen isotopes in fresh water biogenic opal ‐ Northeastern US Alleröd‐Younger Dryas temperature shift
Author(s) -
Shemesh Aldo,
Peteet Dorothy
Publication year - 1998
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/98gl01443
Subject(s) - younger dryas , isotopes of oxygen , geology , climate change , oceanography , geochemistry
The first oxygen isotope analysis of biogenic opal from lake sediments, from the Alleröd/Younger Dryas transition in a core from Linsley Pond, Connecticut, gives an average estimate of a 6°C drop in temperature during the Younger Dryas. This shift represents temperatures during the bloom season, and may be less than the winter temperature drop. The sharp transition itself, with a duration of about 200 years, suggests that the temperature decrease may have been as large as 12°C. Previous estimates of the Alleröd/Younger Dryas temperature shifts are controversial, and range from 3–20°C, suggesting that further interdisciplinary research on the same samples is warranted.