FN Archimer Export Format PT J TI North Atlantic Deep Water Production during the Last Glacial Maximum BT AF HOWE, Jacob N. W. PIOTROWSKI, Alexander M. NOBLE, Taryn L. MULITZA, Stefan CHIESSI, Cristiano M. BAYON, Germain AS 1:1;2:1;3:1,2;4:3;5:4;6:5; FF 1:;2:;3:;4:;5:;6:PDG-REM-GM-LGS; C1 Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England. Univ Tasmania, IMAS, Hobart, Tas 7001, Australia. Univ Bremen, MARUM Ctr Marine Environm Sci, Leobener Str, D-28359 Bremen, Germany. Univ Sao Paulo, Sch Arts Sci & Humanities, Av Arlindo Bettio 1000, BR-03828000 Sao Paulo, SP, Brazil. Inst Francais Rech Exploitat Mer IFREMER, Unite Rech Geosci Marines, F-29280 Plouzane, France. C2 UNIV CAMBRIDGE, UK UNIV TASMANIA, AUSTRALIA UNIV BREMEN MARUM, GERMANY UNIV SAO PAULO, BRAZIL IFREMER, FRANCE SI BREST SE PDG-REM-GM-LGS IN WOS Ifremer jusqu'en 2018 DOAJ copubli-europe copubli-int-hors-europe copubli-sud IF 12.124 TC 112 UR https://archimer.ifremer.fr/doc/00343/45386/44888.pdf https://archimer.ifremer.fr/doc/00343/45386/44889.pdf LA English DT Article AB Changes in deep ocean ventilation are commonly invoked as the primary cause of lower glacial atmospheric CO2. The water mass structure of the glacial deep Atlantic Ocean and the mechanism by which it may have sequestered carbon remain elusive. Here we present neodymium isotope measurements from cores throughout the Atlantic that reveal glacial-interglacial changes in water mass distributions. These results demonstrate the sustained production of North Atlantic Deep Water under glacial conditions, indicating that southern-sourced waters were not as spatially extensive during the Last Glacial Maximum as previously believed. We demonstrate that the depleted glacial delta C-13 values in the deep Atlantic Ocean cannot be explained solely by water mass source changes. A greater amount of respired carbon, therefore, must have been stored in the abyssal Atlantic during the Last Glacial Maximum. We infer that this was achieved by a sluggish deep overturning cell, comprised of well-mixed northern-and southern-sourced waters. PY 2016 PD JUL SO Nature Communications SN 2041-1723 PU Nature Publishing Group VL 7 IS 11765 UT 000377226600001 BP 1 EP 8 DI 10.1038/ncomms11765 ID 45386 ER EF