Greenland Cosmogenic Exposure Ages Database Sinclair, G.; Carlson, A.E.; Mix, A.C.; Lecavalier, B.S.; Milne, G.A.; Mathias, A.; Buizert, C.; DeConto, R.M. Sinclair, G. Carlson, A.E. Mix, A.C. Lecavalier, B.S. Milne, G.A. Mathias, A. Buizert, C. DeConto, R.M. earth science/paleoclimate/others (Greenland>LATITUDE >LONGITUDE ) The last deglaciation is the most recent interval of large-scale climate change that drove the Greenland ice sheet from continental shelf to within its present extent. Here, we use a database of 645 published 10Be ages from Greenland to document the spatial and temporal patterns of retreat of the Greenland ice sheet during the last deglaciation. Following initial retreat of its marine margins, most land-based deglaciation occurred in Greenland following the end of the Younger Dryas cold period (12.9-11.7 ka). However, deglaciation in east Greenland peaked significantly earlier (13.0-11.5 ka) than that in south Greenland (11.0-10 ka) or west Greenland (10.5-7.0 ka). The terrestrial deglaciation of east and south Greenland coincide with adjacent ocean warming. 14C ages and a recent ice-sheet model reconstruction do not capture this progression of terrestrial deglacial ages from east to west Greenland, showing deglaciation occurring later than observed in 10Be ages. This model-data misfit likely reflects the absence of realistic ice-ocean interactions. We suggest that oceanic changes may have played an important role in driving the spatial-temporal ice-retreat pattern evident in the 10Be data. STUDY NOTES: Database of all cosmogenic exposure ages in Greenland (as of May 2016), including sample metadata, original published age, and information necessary for re-calculating ages using the CRONUS online calculator (hess.ess.washington.edu). In addition, ages calculated using the Northeast North American (NENA) and Arctic Production rates are included. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Sinclair, G. Investigator : Carlson, A.E. Investigator : Mix, A.C. Investigator : Lecavalier, B.S. Investigator : Milne, G.A. Investigator : Mathias, A. Investigator : Buizert, C. Investigator : DeConto, R.M. 2016-11-10 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/20776 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sinclair2016/greenland2016-10be.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sinclair2016/greenland2016-10be.txt English https://www.ncdc.noaa.gov/paleo/study/20776 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sinclair2016/greenland2016-10be.txt G. Sinclair, A.E. Carlson, A.C. Mix, B.S. Lecavalier, G. Milne, A. Mathias, C. Buizert, R. Deconto 2016Diachronous retreat of the Greenland ice sheet during the last deglaciationQuaternary Science Reviews145243-25810.1016/j.quascirev.2016.05.040http://www.sciencedirect.com/science/article/pii/S0277379116301925 START YEAR: 305000 cal yr BP * END YEAR: 331 cal yr BP -60 60 -20 82