Can Paleoceanographic Tracers Constrain Meridional Circulation Rates?

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Can Paleoceanographic Tracers Constrain Meridional Circulation Rates?

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Title: Can Paleoceanographic Tracers Constrain Meridional Circulation Rates?
Author: Huybers, Peter John; Gebbie, Geoffrey A; Marchal, Olivier

Note: Order does not necessarily reflect citation order of authors.

Citation: Huybers, Peter J., Geoffrey Gebbie, and Olivier Marchal. 2007. Can paleoceanographic tracers constrain meridional circulation rates? Journal of Physical Oceonography 37(2): 394-407.
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Abstract: The ability of paleoceanographic tracers to constrain rates of transport is examined using an inverse method to combine idealized observations with a geostrophic model. Considered are the spatial distribution, accuracy, and types of tracers required to constrain changes in meridional transport within an idealized single-hemisphere basin. Measurements of density and radioactive tracers each act to constrain rates of transport. Conservative tracers, while not of themselves able to inform regarding rates of transport, improve constraints when coupled with density or radioactive observations. It is found that the tracer data would require an accuracy one order of magnitude better than is presently available for paleo-observations to conclusively rule out factor-of-2 changes in meridional transport, even when assumed available over the entire model domain. When data are available only at the margins and bottom of the model, radiocarbon is unable to constrain transport while density remains effective only when a reference velocity level is assumed. The difficulty in constraining the circulation in this idealized model indicates that placing firm bounds on past meridional transport rates will prove challenging.
Published Version: http://dx.doi.org/10.1175/JPO3018.1
Other Sources: http://www.people.fas.harvard.edu/~phuybers/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:3383440

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  • FAS Scholarly Articles [7218]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University
 
 

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