Ventilation of North Pacific intermediate waters: The role of the Alaskan Gyre
Article first published online: 20 SEP 2012
Copyright 1991 by the American Geophysical Union.
Journal of Geophysical Research: Oceans (1978–2012)
Volume 96, Issue C9, pages 16801–16810, 15 September 1991
How to Cite
1991), Ventilation of North Pacific intermediate waters: The role of the Alaskan Gyre, J. Geophys. Res., 96(C9), 16801–16810, doi:10.1029/91JC01783., , and (
- Issue published online: 20 SEP 2012
- Article first published online: 20 SEP 2012
- Manuscript Accepted: 1 JUN 1991
- Manuscript Received: 5 OCT 1990
Hydrographic data, tritium data, and potential vorticity calculations suggest that although North Pacific Intermediate Water is formed in the northwest, the Alaskan Gyre might be an additional ventilation site. The proposed ventilation is quantified by a vertical column tritium inventory, which indicates an excess of 0.08 kg of tritium in the Alaskan Gyre. An evaluation of the energy stored in the water column and of wind and buoyancy forcing shows that during winter conditions enough energy can be pumped into the system to force 26.80 σθ to outcrop in the Alaskan Gyre. Model results suggest that relatively limited outcrops in time and space (tens of days and several hundred kilometers in diameter) can account for the excess tritium.