Abrupt changes in atmospheric circulation during the Medieval Climate Anomaly and the Little Ice Age recorded by Sr-Nd isotopes in the Siple Dome ice core, Antarctica

Bess G Koffman1, Steven L Goldstein2, Gisela Winckler3, Michael R Kaplan2, Louise Bolge4 and Pierre Biscaye5, (1)Colby College, Department of Geology, Waterville, United States, (2)Lamont-Doherty Earth Observatory, Palisades, United States, (3)Columbia University, Department of Earth and Environmental Sciences, New York, NY, United States, (4)Columbia University of New York, Palisades, NY, United States, (5)Lamont -Doherty Earth Observatory, Palisades, NY, United States
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