Alaska Palaeo-Glacier Atlas (Version 2) Kaufman, D.S.; Young, N.E.; Briner, J.P.; Manley, W.F. Kaufman, D.S. Young, N.E. Briner, J.P. Manley, W.F. Arctic Glacial Glaciers and Ice Sheets Reconstruction earth science/paleoclimate/others (Alaska>LATITUDE >LONGITUDE ) This report is an update of the Alaska PalaeoGlacier Atlas. It includes information published since 2002 and is based on a more detailed map scale. In addition to the all-time maximum extent of former glaciers and the late Wisconsinan extent, this update includes the mapped limit for the penultimate glaciation, which generally occurred during the early Wisconsinan. The update also includes a compilation of cosmogenic exposure ages linked to the geospatial database. STUDY NOTES: This report is an update of the Alaska Palaeo-Glacier Atlas (APG Atlas), a collaborative effort among glacial geologists working in Alaska to compile a coherent map of former glacier limits from across the state. The previous version of the digital atlas (v1) was originally available online in 2002 (Manley and Kaufman, 2002). The evidence used to draw the glacial limits in 14 regions across Alaska was described in a subsequent report (Kaufman and Manley, 2004), which was part of a larger effort to create a global database of Pleistocene glacial extents with a target scale of 1:1,000,000. This update (APG Atlas v2) is based on a more detailed map scale and, therefore, provides more accurately resolved limits of former glacier extents. In addition, the previous version included the only two glacier limits that could be most confidently mapped and correlated around the state: (1) the all-time maximum extent of former glaciers; and (2) the late Wisconsinan extent (= late Weichselian = marine isotope stage (MIS) 2 = spanning the period between about 24,000 and 12,000 years ago). In this update, we added a third mapped limit for areas where it has been sufficiently well studied, namely for the penultimate glaciation, which over most of Alaska occurred during the early Wisconsinan. Glacier extent maps are available in Google Earth format at: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/alaska-glacier-atlas/alaska-palaeoglacier-atlas-v2.kmz or in ARC GIS format at: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/alaska-glacier-atlas/arcgis/ Exposure ages are listed below, and in the equivalent Excel format file: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/alaska-glacier-atlas/alaska-palaeoglacier-atlas-v2.xls NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Kaufman, D.S. Investigator : Young, N.E. Investigator : Briner, J.P. Investigator : Manley, W.F. 2011-08-08 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/11921 https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/alaska-glacier-atlas/alaska-palaeoglacier-atlas-v2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/alaska-glacier-atlas/alaska-palaeoglacier-atlas-v2.xls https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/alaska-glacier-atlas/alaska-palaeoglacier-atlas-v2.kmz https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/alaska-glacier-atlas/alaska-palaeoglacier-atlas-v2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/alaska-glacier-atlas/alaska-palaeoglacier-atlas-v2.xls https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/alaska-glacier-atlas/alaska-palaeoglacier-atlas-v2.kmz English https://www.ncdc.noaa.gov/paleo/study/11921 https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/alaska-glacier-atlas/alaska-palaeoglacier-atlas-v2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/alaska-glacier-atlas/alaska-palaeoglacier-atlas-v2.xls https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/alaska-glacier-atlas/alaska-palaeoglacier-atlas-v2.kmz Kaufman, D.S., N.E. Young, J.P. Briner, and W.F. Manley. 2011. Alaska Palaeo-Glacier Atlas (Version 2). In: Ehlers, J., P.L. Gibbard, and P.D. Hughes (eds), Quaternary Glaciations - Extent and Chronology - A Closer Look. Developments in Quaternary Science, Vol. 15, pp. 427-445. Elsevier, Amsterdam. ISBN: 978-0-444-53447-7 doi:10.1016/B978-0-444-53447-7.00033-7 http://www.sciencedirect.com/science/article/pii/B9780444534477000337 -168 59 -142 70