Record Details
Field | Value |
---|---|
Title | Anomalously warm July 2005 in the northern California Current : historical context and the significance of cumulative wind stress |
Names |
Pierce, Stephen D.
(creator) Barth, John A. (creator) Thomas, Rebecca E. (creator) Fleischer, Guy W. (creator) |
Date Issued | 2006 (iso8601) |
Note | copyrighted by American Geophysical Union |
Abstract | In the northern California Current, the onset of the 2005 upwelling season was five weeks later than usual, and well established upwelling with a cold surface signature did not occur until about seven weeks after this. As part of the joint US-Canada Pacific hake survey, from 14–16 July 2005 we occupied the Newport Hydrographic line at 44.65°N, from the Oregon coast to 83 km offshore. Instead of the cold surface layer expected in July, we observed anomalously warm water. For example, 10-m temperature at the shelf station NH-5 was the warmest ever recorded in July at this location: 6.2°C above average, with observations back to 1961. We explore the pivotal role played by cumulative (time-integrated) wind forcing in the development of upwelling, in both 2005 and previous years. We find that 80% of July surface layer (0–30 m) interannual temperature variance can be explained by cumulative upwelling index from the spring transition. |
Genre | Article |
Identifier | Pierce, S. D., Barth, J. A., Thomas, R. E. and Fleischer, G. W., 2006, Anomalously warm July 2005 in the northern California Current: Historical context and the significance of cumulative wind stress: Geophys. Res. Lett., v. 33, L22S04. |