FN Archimer Export Format PT J TI New magnetostratigraphic insights from Iceberg Alley on the rhythms of Antarctic climate during the Plio‐Pleistocene BT AF Reilly, Brendan T. Tauxe, Lisa Brachfeld, Stefanie Raymo, Maureen Bailey, Ian Hemming, Sidney Weber, Michael E. Williams, Trevor Garcia, Marga Guitard, Michelle Martos, Yasmina M. Pérez, Lara F. Zheng, Xufeng Armbrecht, Linda Cardillo, Fabricio G. Du, Zhiheng Fauth, Gerson Glueder, Anna Gutjahr, Marcus Hernández‐Almeida, Iván Hoem, Frida S. Hwang, Ji‐Hwan Iizuka, Mutsumi Kato, Yuji Kenlee, Bridget O’Connell, Suzanne Peck, Victoria Ronge, Thomas A. Seki, Osamu Tripathi, Shubham Warnock, Jonathan AS 1:1;2:1;3:2;4:3;5:4;6:3;7:5;8:6;9:7;10:8;11:9,10;12:11;13:12;14:13;15:14;16:15;17:16;18:17;19:18;20:19;21:20;22:21;23:22;24:23;25:24;26:25;27:11;28:26;29:27;30:28;31:29; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;15:;16:;17:;18:;19:;20:;21:;22:;23:;24:;25:;26:;27:;28:;29:;30:;31:; C1 Scripps Institution of Oceanography University of California San Diego La Jolla CA92093, USA Earth and Environmental Studies Montclair State University Montclair NJ07043, USA Lamont‐Doherty Earth Observatory Columbia University Palisades NY10964, USA Camborne School of Mines and Environmental Sustainability Institute University of Exeter Penryn Campus CornwallTR10 9FE ,UK Institute for Geosciences University of Bonn Bonn53115, Germany International Ocean Discovery Program Texas AM University College Station TX77845 ,USA Oceanographic Center of Cadiz Spanish Institute of Oceanography (IEO) Puerto Pesquero, Muelle de Levante, S/NCádiz, 11006 ,Spain College of Marine Science University of South Florida St. Petersburg FL33701, USA Planetary Magnetospheres Laboratory NASA Goddard Space Flight Center Greenbelt MD20771, USA Department of Astronomy University of Maryland College Park College Park MD20742 ,USA British Antarctic Survey CambridgeCB3 0ET,UK South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou510301, China Australian Centre for Ancient DNA Department of Ecology & Evolutionary Biology University of Adelaide South Australia5005, Australia Departmento Oceanografia Servicio de Hidrografia Naval Ministerio de Defensa, Argentina State Key Laboratory of Cryospheric Science Northwest Institute of Eco‐Environment and Resources Chinese Academy of Sciences Lanzhou730000 ,China Geology Program University of Vale do Rio dos Sinos São Leopoldo RS, 93022‐750, Brazil College of Earth Ocean, and Atmospheric Sciences Oregon State University Corvallis OR97331, USA GEOMAR Helmholtz Centre for Ocean Research Kiel 24148 Kiel, Germany Department of Earth Sciences ETH Zürich 8092 Zurich, Switzerland Department of Earth Sciences Marine Palynology and Paleoceanography Utrecht University 3584CB Utrecht ,Netherlands Earth Environmental Sciences Korea Basic Science Institute Chungbuk Cheongju ,Republic of Korea Knowledge Engineering Tokyo City University Tokyo setagaya‐ku158‐0087 ,Japan Center for Advanced Marine Core Research Kochi University MonobeNankoku Kochi783‐8502, Japan Department of Earth Sciences University of California Riverside Riverside CA92521, USA Department of Earth and Environmental Sciences Wesleyan University Middletown CT06459 ,USA Alfred Wegener Institute Helmholtz Center for Polar and Marine Research 27568 Bremerhaven ,Germany Institute of Low Temperature Science Hokkaido University Sapporo Hokkaido060‐0819, Japan Marine Stable Isotope Lab National Centre for Polar and Ocean Research Ministry of Earth Sciences Vasco Da Gama403804, India Department of Geoscience Indiana University of Pennsylvania Indiana PA15705 ,USA C2 UNIV CALIF SAN DIEGO, USA UNIV MONTCLAIR STATE, USA UNIV COLUMBIA, USA UNIV EXETER, UK UNIV BONN, GERMANY UNIV TEXAS A&M, USA IEO, SPAIN UNIV S FLORIDA, USA NASA, USA UNIV MARYLAND, USA BRITISH ANTARCTIC SURVEY (BAS), UK SCSIO, CHINA UNIV ADELAIDE, AUSTRALIA SERV HIDROG NAVAL, ARGENTINA CHINESE ACAD SCI, CHINA UNISINOS, BRAZIL UNIV OREGON STATE, USA IFM GEOMAR, GERMANY ETH ZURICH, SWITZERLAND UNIV UTRECHT, NETHERLANDS KBSI, SOUTH KOREA UNIV TOKYO, JAPAN UNIV KOCHI, JAPAN UNIV CALIF RIVERSIDE, USA UNIV WESLEYAN, USA INST A WEGENER, GERMANY UNIV HOKKAIDO, JAPAN NCPOR, INDIA UNIV INDIANA, USA IF 3.992 TC 10 UR https://archimer.ifremer.fr/doc/00678/79035/81470.pdf https://archimer.ifremer.fr/doc/00678/79035/81471.pdf https://archimer.ifremer.fr/doc/00678/79035/81472.xlsx LA English DT Article CR VT 88 / OOMPH-1 - MD 160 / OOMPH BO Marion Dufresne DE ;Antarctica;Dove Basin;Iceberg Alley;International Ocean Discovery Program (IODP);magnetostratigraphy;Scotia Sea AB International Ocean Discovery Program (IODP) Expedition 382 in the Scotia Sea’s Iceberg Alley recovered among the most continuous and highest resolution stratigraphic records in the Southern Ocean near Antarctica spanning the last 3.3 Myr. Sites drilled in Dove Basin (U1536/U1537) have well‐resolved magnetostratigraphy and a strong imprint of orbital forcing in their lithostratigraphy. All magnetic reversals of the last 3.3 Myr are identified, providing a robust age model independent of orbital tuning. During the Pleistocene, alternation of terrigenous versus diatomaceous facies shows power in the eccentricity and obliquity frequencies comparable to the amplitude modulation of benthic δ18O records. This suggests that variations in Dove Basin lithostratigraphy during the Pleistocene reflect a similar history as globally integrated ice volume at these frequencies. However, power in the precession frequencies over the entire ∼3.3 Myr record does not match the amplitude modulation of benthic δ18O records, suggesting Dove Basin contains a unique record at these frequencies. Comparing the position of magnetic reversals relative to local facies changes in Dove Basin and the same magnetic reversals relative to benthic δ18O at North Atlantic IODP Site U1308, we demonstrate Dove Basin facies change at different times than benthic δ18O during intervals between ∼3 and 1 Ma. These differences are consistent with precession phase shifts and suggest climate signals with a Southern Hemisphere summer insolation phase were recorded around Antarctica. If Dove Basin lithology reflects local Antarctic ice volume changes, these signals could represent ice sheet precession‐paced variations not captured in benthic δ18O during the 41‐kyr world. PY 2021 PD FEB SO Paleoceanography And Paleoclimatology SN 2572-4517 PU American Geophysical Union (AGU) VL 36 IS 2 UT 000624116800011 DI 10.1029/2020PA003994 ID 79035 ER EF