Complexity of Holocene Climate as Reconstructed from a Greenland Ice Core
作者： S. R. O'Brien , P. A. Mayewski , L. D. Meeker , D. A. Meese , M. S. Twickler
DOI: 10.1126/SCIENCE.270.5244.1962
关键词: Physical geography 、 Oceanography 、 Holocene 、 Younger Dryas 、 Geology 、 Snow 、 Ice core 、 Latitude 、 Atmosphere 、 Sea salt 、 Polar vortex
摘要: Glaciochemical time series developed from Summit, Greenland, indicate that the chemical composition of atmosphere was dynamic during Holocene epoch. Concentrations sea salt and terrestrial dusts increased in Summit snow periods 0 to 600, 2400 3100, 5000 6100, 7800 8800, more than 11,300 years ago. The most recent increase, also abrupt, coincides with Little Ice Age. These changes imply either north polar vortex expanded or meridional air flow intensified these periods, temperatures mid high northern latitudes were potentially coldest since Younger Dryas event.
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