CaltechAUTHORS
  A Caltech Library Service

The Salinity, Temperature, and δ18O of the Glacial Deep Ocean

Adkins, Jess F. and McIntyre, Katherine and Schrag, Daniel P. (2002) The Salinity, Temperature, and δ18O of the Glacial Deep Ocean. Science, 298 (5599). pp. 1769-1773. ISSN 0036-8075. https://resolver.caltech.edu/CaltechAUTHORS:20120828-115444522

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20120828-115444522

Abstract

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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1126/science.1076252 DOIUNSPECIFIED
http://www.sciencemag.org/content/298/5599/1769PublisherUNSPECIFIED
ORCID:
AuthorORCID
Adkins, Jess F.0000-0002-3174-5190
Additional Information:© 2002 American Association for the Advancement of Science. 17 July 2002; accepted 29 October 2002. We thank K. Cuffey for insightful discussions about hydrology and E. Boyle and an anonymous reviewer for helpful comments. E. Boyle is thanked for inspiration and continued encouragement. E. Goddard provided assistance withlab work. Supported by NSF grant numbers OCE-0096814 to J.F.A. and OCE-0096909 to D.P.S.
Funders:
Funding AgencyGrant Number
NSFOCE-0096814
NSFOCE-0096909
Issue or Number:5599
Record Number:CaltechAUTHORS:20120828-115444522
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20120828-115444522
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33608
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:28 Aug 2012 21:18
Last Modified:24 Feb 2020 10:30

Repository Staff Only: item control page