FN Archimer Export Format PT J TI Sediment controls dynamic behavior of a Cordilleran Ice Stream at the Last Glacial Maximum BT AF Cowan, Ellen A. Zellers, Sarah D. Müller, Juliane Walczak, Maureen H. Worthington, Lindsay L. Caissie, Beth E. Clary, Wesley A. Jaeger, John M. Gulick, Sean P. S. Pratt, Jacob W. Mix, Alan C. Fallon, Stewart J. AS 1:1;2:2;3:3,4;4:5;5:6;6:7;7:6;8:8;9:9;10:1;11:5;12:10; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:; C1 Department of Geological and Environmental Sciences, Appalachian State University, Box 32067, Boone, NC, 28608, USA School of Geoscience, Physics, and Safety, University of Central Missouri, Warrensburg, MO, 64093, USA Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Alten Hafen 26, 27568, Bremerhaven, Germany Center for Marine Environmental Sciences, University of Bremen/MARUM, 28359, Bremen, Germany College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, 97331, USA Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM, 87131, USA Department of Geological and Atmospheric Sciences, Iowa State University, Ames, IA, 50011, USA Department of Geological Sciences, University of Florida, Gainesville, FL, 32611, USA Institute for Geophysics & Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, 78758, USA Research School of Earth Science, The Australian National University, Canberra, ACT, 2601, Australia C2 UNIV APPALACHIAN STATE, USA UNIV CTRL MISSOURI, USA INST A WEGENER, GERMANY UNIV BREMEN MARUM, GERMANY UNIV OREGON STATE, USA UNIV NEW MEXICO, USA UNIV IOWA, USA UNIV FLORIDA, USA UNIV TEXAS AUSTIN, USA UNIV AUSTRALIAN NATL, AUSTRALIA IN DOAJ IF 14.919 TC 8 UR https://archimer.ifremer.fr/doc/00694/80603/83840.pdf https://archimer.ifremer.fr/doc/00694/80603/83841.pdf https://archimer.ifremer.fr/doc/00694/80603/83842.pdf https://archimer.ifremer.fr/doc/00694/80603/83843.pdf https://archimer.ifremer.fr/doc/00694/80603/83844.xlsx https://archimer.ifremer.fr/doc/00694/80603/83846.xlsx https://archimer.ifremer.fr/doc/00694/80603/83847.xlsx https://archimer.ifremer.fr/doc/00694/80603/83848.xlsx https://archimer.ifremer.fr/doc/00694/80603/83849.xlsx https://archimer.ifremer.fr/doc/00694/80603/83850.xlsx https://archimer.ifremer.fr/doc/00694/80603/83851.xlsx https://archimer.ifremer.fr/doc/00694/80603/83852.xlsx https://archimer.ifremer.fr/doc/00694/80603/83853.xlsx LA English DT Article CR MD 126 / MONA BO Marion Dufresne AB The uncertain response of marine terminating outlet glaciers to climate change at time scales beyond short-term observation limits models of future sea level rise. At temperate tidewater margins, abundant subglacial meltwater forms morainal banks (marine shoals) or ice-contact deltas that reduce water depth, stabilizing grounding lines and slowing or reversing glacial retreat. Here we present a radiocarbon-dated record from Integrated Ocean Drilling Program (IODP) Site U1421 that tracks the terminus of the largest Alaskan Cordilleran Ice Sheet outlet glacier during Last Glacial Maximum climate transitions. Sedimentation rates, ice-rafted debris, and microfossil and biogeochemical proxies, show repeated abrupt collapses and slow advances typical of the tidewater glacier cycle observed in modern systems. When global sea level rise exceeded the local rate of bank building, the cycle of readvances stopped leading to irreversible retreat. These results support theory that suggests sediment dynamics can control tidewater terminus position on an open shelf under temperate conditions delaying climate-driven retreat. PY 2020 PD APR SO Nature Communications SN 2041-1723 PU Springer Science and Business Media LLC VL 11 IS 1 UT 000528789000016 DI 10.1038/s41467-020-15579-0 ID 80603 ER EF