Structure and variability of the mesoscale circulation in the Caribbean Sea as deduced from satellite altimetry
MetadataShow full item record
Four years of Topex/Poseidon (TIP) and European Remote Sensing Satellite (ERS) altimetry data in the Caribbean Sea are used to describe the structure and variability of the mesoscale circulation in this area. These results are compared with satellite-derived sea surface temperature (SST) and drifter trajectories for the same period of time. Contour maps of sea surface height anomalies made for each 10-day period (TIP data) reveal the formation and evolution of anticyclonic and cyclonicmesoscale features in the central part of the Caribbean Sea during the entire period studied. These features move westward at average speeds between 10 and 15 cm/s, growing in amplitude up to 25 Cm. Also, a quasi-permanent gyre is detected in the Golfo de los Mosquitos (coast of Panarna and Colombia). The sense of rotation of this gyre is shown to be modulated seasonally. Enhanced relative clockwise and counterclockwise rotation are observed during the rainy season (June-October) and the dry/windy season (January-April), respectively. No strong mesoscale anomalies are detected in the eastern part of the Caribbean Sea where they are expected. A seasonal cycle is found in the sea level anomaly (SLA) derived from TIP and ERS-1 data due to steric effects. Upwelling is observed near the coast of Venezuela during the dry season. A comparison of SLA with SST is made and good correlation is observed at some locations. Drifter trajectories contemporaneous with SLA data agree well with the sense of rotation of strong features, but the drifter speeds are twice the absolute geostrophic currents calculated from SLA
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Andrade Amaya, Carlos Alberto (Monterey, California. Naval Postgraduate School, 1991-03);Two years of GEOSAT Exact Repeat Mission (ERM) altimetry and wind speed measurements in the Caribbean Sea are used to determine the sea surface height mesoscale variability and to characterize the wind stress field during ...
Parks, Steven A. (Monterey, California. Naval Postgraduate School, 1997);Previous studies of human knee motion are based on finite rotation data collected using large rotation steps varying from 5 to 30 degrees. In some cases this rotation data is used to develop axes of rotation for the joint. ...
Interannual variability in sea-surface temperature at one location along the Central California coast Breaker, L. C.; Lewis, Peter A. W.; Orav, Endel John (Monterey, California. Naval Postgraduate School, 1984-05); NPS55-84-012Sea surface temperature (SST) since March 1, 1971 at Granite Canyon, just north of Pt. Sur, California, are examined for interannual variability. Each of four El Nino episodes occurring over the past 13 years can be ...