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Sediment 231Pa/230Th as a Recorder of the Rate of the Atlantic Meridional Overturning Circulation: Insights from a 2-d Model : Volume 6, Issue 3 (24/11/2009)

By Luo, Y.

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Book Id: WPLBN0004021093
Format Type: PDF Article :
File Size: Pages 75
Reproduction Date: 2015

Title: Sediment 231Pa/230Th as a Recorder of the Rate of the Atlantic Meridional Overturning Circulation: Insights from a 2-d Model : Volume 6, Issue 3 (24/11/2009)  
Author: Luo, Y.
Volume: Vol. 6, Issue 3
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Allen, S. E., Francois, R., & Luo, Y. (2009). Sediment 231Pa/230Th as a Recorder of the Rate of the Atlantic Meridional Overturning Circulation: Insights from a 2-d Model : Volume 6, Issue 3 (24/11/2009). Retrieved from

Description: Department of Earth and Ocean Sciences, University of British Columbia, 6339 Stores Road, Vancouver, BC, V6T 1Z4, Canada. A two dimensional scavenging-circulation model is used to investigate the patterns of sediment 231Pa/230Th generated by the Atlantic Meridional Overturning Circulation (AMOC) and further advance the application of this proxy for ocean paleocirculation studies. The scavenging parameters and the geometry of the overturning circulation cell have been chosen so that the model generates meridional sections of dissolved 230Th and 231Pa consistent with published water column profiles and an additional 12 previously unpublished profiles measured in the North and Equatorial Atlantic. The processes that generate the meridional sections of dissolved and particulate 230Th, dissolved and particulate 231Pa, dissolved and particulate 231Pa/230Th, and sediment 231Pa/230Th are discussed in detail. The results indicate that the relationship between sediment 231Pa/230Th at any given site and the overturning circulation is very complex. They clearly show that constraining past changes in the strength and geometry of the AMOC requires an extensive data set and they suggest strategies to maximize information from a limited number of samples.

Sediment 231Pa/230Th as a recorder of the rate of the Atlantic meridional overturning circulation: insights from a 2-D model

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