2 results on '"Saavedra-Pellitero, M"'
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2. Expedition 383 summary
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Elisa Malinverno, E. Michel, N. Foucher McColl, J. Gottschalk, J.S. Stoner, Mariem Saavedra-Pellitero, V.J. Lawson, L. Lo, S. Moretti, Shiming Wan, Shinya Iwasaki, L.C. Herbert, Gisela Winckler, Igor Martins Venancio, C. A. Alvarez Zarikian, Xiaojian Zhao, Ana Christina Ravelo, C. Basak, Jennifer L. Middleton, Frank Lamy, Christopher M. Moy, A.L. Souza, R.A. Smith, Jesse Farmer, L. Lembke-Jene, Anieke Brombacher, Christina R. Riesselman, Helge W Arz, Oliver Esper, I. Seo, Raj K. Singh, Lamy, F., Winckler, G., Alvarez Zarikian, C.A., and the Expedition 383 Scientists, Winckler, G, Lamy, F, Alvarez Zarikian, C, Arz, H, Basak, C, Brombacher, A, Esper, O, Farmer, J, Gottschalk, J, Herbert, L, Iwasaki, S, Lawson, V, Lembke-Jene, L, Lo, L, Malinverno, E, Michel, E, Middleton, J, Moretti, S, Moy, C, Ravelo, A, Riesselman, C, Saavedra-Pellitero, M, Seo, I, Singh, R, Smith, R, Souza, A, Stoner, J, Venancio, I, Wan, S, Zhao, X, Foucher McColl, N, Lamont-Doherty Earth Observatory (LDEO), Columbia University [New York], Alfred Wegener Institute for Polar and Marine Research (AWI), International Ocean Discovery Program, Leibniz Institute for Baltic Sea Research Warnemünde (IOW), University of Delaware [Newark], National Oceanography Centre (NOC), Department of Geosciences [Princeton], Princeton University, School of Marine and Atmospheric Sciences [Stony Brook] (SoMAS), Stony Brook University [SUNY] (SBU), State University of New York (SUNY)-State University of New York (SUNY), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Rutgers, The State University of New Jersey [New Brunswick] (RU), Rutgers University System (Rutgers), National Taïwan University (NTU), Università degli Studi di Milano = University of Milan (UNIMI), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Paléocéanographie (PALEOCEAN), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Max Planck Institute for Chemistry (MPIC), Max-Planck-Gesellschaft, University of Otago [Dunedin, Nouvelle-Zélande], University of California [Santa Cruz] (UC Santa Cruz), University of California (UC), University of Birmingham [Birmingham], Korea Institute of Ocean Science and Technology (KIOST), Indian Institute of Technology Bhubaneshwar, University of Massachusetts [Amherst] (UMass Amherst), University of Massachusetts System (UMASS), State University of Rio de Janeiro, Oregon State University (OSU), Center for Weather Forecasting and Climate Studies [São Paulo] (CPTEC), Instituto Nacional de Pesquisas Espaciais (INPE), Chinese Academy of Sciences [Beijing] (CAS), National Insitute of Polar Research [Japan], National Institute of Polar Research [Tokyo] (NiPR), and Universidad Andrés Bello [Santiago] (UNAB)
- Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere ,International Ocean Discovery Program ,GEO/02 - GEOLOGIA STRATIGRAFICA E SEDIMENTOLOGICA ,International Ocean Discovery Program, IODP, JOIDES Resolution, Expedition 383, Dynamics of the Pacific Antarctic Circumpolar Current, Site U1539, Site U1540, Site U1541, Site U1542, Site U1543, Site U1544, Southern Ocean, South Pacific, Chilean margin, paleoceanography, Antarctic Circumpolar Current, oceanic fronts, Circumpolar Deep Water, Antarctic Intermediate Water, marine carbon cycle, dust, biological productivity, iron fertilization, southern westerly winds, Patagonian ice sheet, West Antarctic ice sheet ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment ,GEO/01 - PALEONTOLOGIA E PALEOECOLOGIA ,ComputingMilieux_MISCELLANEOUS ,Geology ,IODP ,JOIDES Resolution ,Expedition 383 - Abstract
The Antarctic Circumpolar Current (ACC), the world’s strongest zonal current system, connects all three major ocean basins of the global ocean and therefore integrates and responds to global climate variability. Its flow is largely driven by strong westerly winds and is constricted to its narrowest extent in the Drake Passage. Fresh and cold Pacific surface and intermediate water flowing through the Drake Passage (cold-water route) and warm Indian Ocean water masses flowing through the Agulhas region (warm-water route) are critical for the South Atlantic contribution to Meridional Overturning Circulation changes. Furthermore, physical and biological processes associated with the ACC affect the strength of the ocean carbon pump and therefore are critical to feedbacks linking atmospheric CO2 concentrations, ocean circulation, and climate/cryosphere on a global scale. In contrast to the Atlantic and Indian sectors of the ACC, and with the exception of drill cores from the Antarctic continental margin and off New Zealand, there are no deep-sea drilling paleoceanographic records from the Pacific sector of the ACC. To advance our understanding of Miocene to Holocene atmosphere-ocean-cryosphere dynamics in the Pacific and their implications for regional and global climate and atmospheric CO2, International Ocean Discovery Program Expedition 383 recovered sedimentary sequences at (1) three sites in the central South Pacific (CSP) (U1539, U1540, and U1541), (2) two sites at the Chilean margin (U1542 and U1544), and (3) one site from the pelagic eastern South Pacific (U1543) close to the entrance to the Drake Passage. Because of persistently stormy conditions and the resulting bad weather avoidance, we were not successful in recovering the originally planned Proposed Site CSP-3A in the Polar Frontal Zone of the CSP. The drilled sediments at Sites U1541 and U1543 reach back to the late Miocene, and those at Site U1540 reach back to the early Pliocene. High sedimentation rate sequences reaching back to the early Pleistocene (Site U1539) and the late Pleistocene (Sites U1542 and U1544) were recovered in both the CSP and at the Chilean margin. Taken together, the sites represent a depth transect from ~1100 m at Chilean margin Site U1542 to ~4070 m at CSP Site U1539 and allow investigation of changes in the vertical structure of the ACC, a key issue for understanding the role of the Southern Ocean in the global carbon cycle. The sites are located at latitudes and water depths where sediments will allow the application of a wide range of siliciclastic-, carbonate-, and opal-based proxies to address our objectives of reconstructing, with unprecedented stratigraphic detail, surface to deep-ocean variations and their relation to atmosphere and cryosphere changes.
- Published
- 2021
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