JAMES O'BRIEN

This study investigates the characteristics of tides in the Gulf of Mexico (GoM) and the response to forcing by local tidal potential and tides propagating as waves through straits connecting this semienclosed sea to the Caribbean Sea and Atlantic Ocean. Numerical simulations performed with the Navy Coastal Ocean Model run in a barotropic configuration with 1/60° horizontal resolution are used

Empirical orthogonal function (EOF) analyses were performed on 36 coastal zone color scanner (CZCS) images of the Mid-Atlantic Bight and Gulf of Maine taken from February 28, 1979, through July 9, 1979. The EOF procedure was modified to allow images with significant portions of data missing because of clouds to be included in the analysis. Analyses performed both with the temporal and with the spatial means removed from the data produced similar results. A strong gradient existed in the temporal mean from high pigment concentrations nearshore to much lower pigment concentrations offshore. The first mode of the temporally averaged analysis explained 21.5% of the variance and showed a south-to-north pattern corresponding to an April Mid-Atlantic Bight bloom and a June bloom over Nantucket Shoals and Platts Bank. The second temporally averaged mode explained 18.3% of the variance and corresponded to a shelf-wide phytoplankton bloom that resulted in increased pigment concentrations through the spring. The first mode of the spatially averaged analysis explained 59.1% of the variance and had a pattern similar to the temporal mean. The second mode explained an additional 13.2% of the variance and was almost identical to the first mode in the temporally averaged analysis. The inclusion of cloud-containing images introduced some small-scale spatial noise into the EOF analyses. However, the inclusion of these images in the EOF analysis allowed postanalysis image reconstruction that provided estimates of pigment concentrations beneath the clouds.

Complex empirical orthogonal function (CEOF) analysis is used to investigate the coastal Kelvin wave driven Rossby wave response in the northeast Pacific. Using CEOF analysis, a spatial structure function is obtained from model upper layer thickness data. The model is a nonlinear, reduced gravity model of the northeast Pacific forced by coastal Kelvin waves originating in the equatorial Pacific. The

... The wave was amplified as the storm moved nearly parallel to the shelf and at comparable speed to the wave phase speed. ... Citation: Morey, SL, S. Baig, MA Bourassa, DS Dukhovskoy, and JJ O'Brien (2006), Remote forcing contribution to storm-induced sea level rise during ...

... An application to the Marginal Ice Zone? LARS PETTER R@ED and JAMES J. O'BRIEN Mesoscale Air-Sea Interaction Group, Florida State University, Tallahassee, Florida 32306, USA . ... This leads logically to a new conjecture for the spread of the ice edge southward in winter. ...

An important human welfare implication of climate involves effects of interannual variation in temperature and precipitation on agriculture. Year-to-year variations in US climate result from El Niño-Southern Oscillation (ENSO), a quasi-periodic re distribution of heat and ...