Mid‐Cretaceous ocean circulation: Results from model sensitivity studies

Mid‐Cretaceous ocean circulation: Results from model sensitivity studies A series of ocean general circulation model (GCM) experiments for mid‐Cretaceous continental paleogeography with atmospheric forcing prescribed from atmospheric GCM experiments are utilized to investigate the nature of the mid‐Cretaceous ocean circulation. The experiments illustrate a Tethys system of clockwise currents and predominant eastward flow, in marked contrast with earlier reconstructions. This result is apparently robust for changes in bathymetry and in the degree of planetary warmth. Changes in sea level have the largest potential to produce alternative circulation characteristics. Two major current systems outside of Tethys dominate the model simulation. The site of bottom water formation is the North Pacific, however, in a sensitivity experiment for a warmer climate, the eastern Tethys became a site of deep water formation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Paleoceanography Wiley

Mid‐Cretaceous ocean circulation: Results from model sensitivity studies

Paleoceanography, Volume 5 (3) – Jun 1, 1990

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Publisher
Wiley
Copyright
Copyright © 1990 by the American Geophysical Union.
ISSN
0883-8305
eISSN
1944-9186
D.O.I.
10.1029/PA005i003p00319
Publisher site
See Article on Publisher Site

Abstract

A series of ocean general circulation model (GCM) experiments for mid‐Cretaceous continental paleogeography with atmospheric forcing prescribed from atmospheric GCM experiments are utilized to investigate the nature of the mid‐Cretaceous ocean circulation. The experiments illustrate a Tethys system of clockwise currents and predominant eastward flow, in marked contrast with earlier reconstructions. This result is apparently robust for changes in bathymetry and in the degree of planetary warmth. Changes in sea level have the largest potential to produce alternative circulation characteristics. Two major current systems outside of Tethys dominate the model simulation. The site of bottom water formation is the North Pacific, however, in a sensitivity experiment for a warmer climate, the eastern Tethys became a site of deep water formation.

Journal

PaleoceanographyWiley

Published: Jun 1, 1990

References

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