Program and Agenda

Abstract

THE WHOI-HAWAII OCEAN TIME-SERIES SITE (WHOTS) MOORING: HIGHLY-RESOLVED UPPER OCEAN TRENDS, VARIABILITY, AND FORCING

The WHOTS surface mooring has been measuring atmospheric surface forcing and upper ocean variability at Station ALOHA with high temporal resolution since mid-2004. Statistical modeling partitions variance into linear trends, a decadal cycle, and three harmonics of the annual cycle. Residual variance consists of internal waves, diurnal cycles, eddies/weather and interannual variability. The significance of linear trend estimates are assessed using the integral time scale of the residuals. The model accounts for almost all of the variance of mixed layer temperature and much less below. Mixed layer cooling (~-0.2C decade-1) is not yet significant at 95%, but the warming below is. These results are consistent with the longer record from the Hawaii Ocean Time-series. Net downward heat flux was reduced by 5 Wm-2decade-1, consistent with the surface cooling. Salinity and velocity trends are not yet significantly different from zero with 95% confidence, but their vertical structures suggest real changes. Longer records will provide stronger tests of significance.

ePoster: http://www.soest.hawaii.edu/whots/

Authors

McCoy, D., University of Hawaii, USA, demccoy@hawaii.edu

Santiago-Mandujano, F. E., University of Hawaii, USA, mandujan@soest.hawaii.edu

Weller, R. A., Woods Hole Oceanographic Institution, USA, rweller@whoi.edu

Plueddemann, A. J., Woods Hole Oceanographic Institution, USA, aplueddemann@whoi.edu

Lukas, R., University of Hawaii, USA, rlukas@hawaii.edu

Details

Poster presentation

Session #:049
Date: 2/27/2014
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: 2463