TY - JOUR
T1 - The Younger Dryas cold interval as viewed from central Greenland
AU - Alley, Richard B.
N1 - Funding Information:
I thank the GISP2 Science Management Office, the 109th New York Air National Guard, the Polar Ice Coring Office, the National Ice Core Laboratory, numerous colleagues at GISP2, GRIP, and elsewhere, P. Jung, and two anonymous reviewers. The National Science Foundation Office of Polar Programs provided funding, with additional funds from the D. and L. Packard Foundation. Data were graciously provided by Ed Brook, Kurt Cuffey, Pieter Grootes, Konrad Hughen, Paul Mayewski, Jeff Severinghaus, Todd Sowers, and colleagues, and through the National Snow and Ice Data Center, University of Colorado at Boulder, and the WDC-A for Paleoclimatology, National Geophysical Data Center, Boulder, Colorado.
PY - 2000/1/1
Y1 - 2000/1/1
N2 - Greenland ice-core records provide an exceptionally clear picture of many aspects of abrupt climate changes, and particularly of those associated with the Younger Dryas event, as reviewed here. Well-preserved annual layers can be counted confidently, with only ≃ 1% errors for the age of the end of the Younger Dryas ≃ 11,500 years before present. Ice-flow corrections allow reconstruction of snow accumulation rates over tens of thousands of years with little additional uncertainty. Glaciochemical and particulate data record atmospheric-loading changes with little uncertainty introduced by changes in snow accumulation. Confident paleothermometry is provided by site-specific calibrations using ice-isotopic ratios, borehole temperatures, and gas-isotopic ratios. Near-simultaneous changes in ice-core paleoclimatic indicators of local, regional, and more-widespread climate conditions demonstrate that much of the Earth experienced abrupt climate changes synchronous with Greenland within thirty years or less. Post-Younger Dryas changes have not duplicated the size, extent and rapidity of these paleoclimatic changes.
AB - Greenland ice-core records provide an exceptionally clear picture of many aspects of abrupt climate changes, and particularly of those associated with the Younger Dryas event, as reviewed here. Well-preserved annual layers can be counted confidently, with only ≃ 1% errors for the age of the end of the Younger Dryas ≃ 11,500 years before present. Ice-flow corrections allow reconstruction of snow accumulation rates over tens of thousands of years with little additional uncertainty. Glaciochemical and particulate data record atmospheric-loading changes with little uncertainty introduced by changes in snow accumulation. Confident paleothermometry is provided by site-specific calibrations using ice-isotopic ratios, borehole temperatures, and gas-isotopic ratios. Near-simultaneous changes in ice-core paleoclimatic indicators of local, regional, and more-widespread climate conditions demonstrate that much of the Earth experienced abrupt climate changes synchronous with Greenland within thirty years or less. Post-Younger Dryas changes have not duplicated the size, extent and rapidity of these paleoclimatic changes.
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U2 - 10.1016/S0277-3791(99)00062-1
DO - 10.1016/S0277-3791(99)00062-1
M3 - Article
AN - SCOPUS:0033960013
SN - 0277-3791
VL - 19
SP - 213
EP - 226
JO - Quaternary Science Reviews
JF - Quaternary Science Reviews
IS - 1-5
ER -
