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      Expedition 363 methods

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          Abstract

          This section documents the procedures and methods employed in the shipboard laboratories on the R/V JOIDES Resolution during International Ocean Discovery Program (IODP) Expedition 363. This information applies only to the shipboard work described in the Expedition Reports section of the Expedition 363 Proceedings of the International Ocean Discovery Program volume. Methods used by investigators for shore-based analyses of Expedition 363 data and samples will be described in separate, individual publications. This introductory section provides an overview of operations, curatorial conventions, depth scale terminology, and general core handling and analyses.

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          The least-squares line and plane and the analysis of palaeomagnetic data

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            A REVISED CENOZOIC GEOCHRONOLOGY AND CHRONOSTRATIGRAPHY

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              The salinity, temperature, and delta18O of the glacial deep ocean.

              J Adkins (2002)
              We use pore fluid measurements of the chloride concentration and the oxygen isotopic composition from Ocean Drilling Program cores to reconstruct salinity and temperature of the deep ocean during the Last Glacial Maximum (LGM). Our data show that the temperatures of the deep Pacific, Southern, and Atlantic oceans during the LGM were relatively homogeneous and within error of the freezing point of seawater at the ocean's surface. Our chloride data show that the glacial stratification was dominated by salinity variations, in contrast with the modern ocean, for which temperature plays a primary role. During the LGM the Southern Ocean contained the saltiest water in the deep ocean. This reversal of the modern salinity contrast between the North and South Atlantic implies that the freshwater budget at the poles must have been quite different. A strict conversion of mean salinity at the LGM to equivalent sea-level change yields a value in excess of 140 meters. However, the storage of fresh water in ice shelves and/or groundwater reserves implies that glacial salinity is a poor predictor of mean sea level.
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                Author and article information

                Journal
                10.14379/iodp.proc.363.2018
                Proceedings of the International Ocean Discovery Program
                International Ocean Discovery Program
                2377-3189
                08 June 2018
                Article
                10.14379/iodp.proc.363.102.2018
                98736f78-1176-41b9-bee3-063f94fa3e3d

                This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

                History

                Earth & Environmental sciences,Oceanography & Hydrology,Geophysics,Chemistry,Geosciences

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