Five years of Florida current structure and transport from the Royal Caribbean cruise ship explorer of the Seas

[1] Using ship-of-opportunity platform Explorer of the Seas, five years of full-depth velocity data have been collected across the Florida Straits at 26°N. Between May 2001 and May 2006 the mean transport of the Florida Current was 31.0 ± 4.0 Sv. This compares to a mean transport of 32.4 ± 3.2 Sv inferred from cable voltages at 27°N over the same period, implying an average 1.4 Sv transport into the Straits through the Northwest Providence Channel. The climatological core of the Florida Current is 170 cms−1 and is positioned at 79.8°W, about 10 km east of the shelf break. The largest variability in velocity occurs over the shelf and shelf break and is likely related to shelf waves. A secondary maximum occurs across much of the Straits over the top 100 m of the water column and may be associated with wind events. The annual cycle of Florida Current transports has a range of 4.7 Sv, with a maximum in May–June–July and a minimum in January. The difference between the summer and winter current structure appears as a first baroclinic mode with zero crossing at 150 m. The maximum difference is about 15 cms−1 at the surface and is centered just offshore of the mean current core. On interannual timescales, low-pass filtered Explorer and cable transports show similar downward trends between 2002 and 2005, but diverge over the last year or so of the record.

[1]  D. A. Brooks,et al.  Wind‐forced continental shelf waves in the Florida Current , 1977 .

[2]  D. Mayer,et al.  Tidal Motions in the Florida Current , 1984 .

[3]  F. Schott,et al.  Florida Current: Low-Frequency Variability as Observed with Moored Current Meters During April 1982 to June 1983 , 1985, Science.

[4]  K. Leaman,et al.  Volume and Heat Transports of the Florida Current: April 1982 Through August 1983 , 1985, Science.

[5]  F. Schott,et al.  Florida Current: Seasonal and Interannual Variability , 1985, Science.

[6]  T. Rossby,et al.  The Structure and Transport of the Gulf Stream at 73°W , 1985 .

[7]  K. Leaman,et al.  Structure and Variability of the Florida Current at 27°N: April 1982–July 1984 , 1987 .

[8]  W. Johns,et al.  Meandering and Transport Variations of the Florida Current , 1987 .

[9]  R. Bleck,et al.  A numerical model of instabilities in the Florida Current , 1988 .

[10]  Thomas N. Lee,et al.  Wind-Forced Transport Fluctuations of the Florida Current , 1988 .

[11]  F. Schott,et al.  Variability of Structure and Transport of the Florida Current in the Period Range of Days to Seasonal , 1988 .

[12]  L. Atkinson,et al.  Gulf Stream frontal eddy influence on productivity of the southeast U.S. continental shelf , 1991 .

[13]  Teresa K. Chereskin,et al.  Modeling the Performance of an Acoustic Doppler Current Profiler , 1993 .

[14]  L. Atkinson,et al.  Transport, potential vorticity, and current/temperature structure across Northwest Providence and Santaren Channels and the Florida Current off Cay Sal Bank , 1995 .

[15]  Charles N. Flagg,et al.  Operating an Acoustic Doppler Current Profiler aboard a Container Vessel , 1998 .

[16]  Tom Rossby,et al.  The Oleander Project: Monitoring the Variability of the Gulf Stream and Adjacent Waters between New Jersey and Bermuda , 1998 .

[17]  Harry L. Bryden,et al.  The velocity and vorticity structure of the Agulhas Current at 32°S , 1999 .

[18]  R. Molinari,et al.  Direct observations of velocity and transport in the passages , 1999 .

[19]  J. Hurrell,et al.  The North Atlantic Oscillation , 2001, Science.

[20]  T. Rossby,et al.  The near-surface velocity and potential vorticity structure of the Gulf Stream , 2001 .

[21]  Molly O. Baringer,et al.  Sixteen years of Florida Current Transport at 27° N , 2001 .

[22]  S. Lentz,et al.  Classical tidal harmonic analysis including error estimates in MATLAB using T_TIDE , 2002 .

[23]  J. Sheinbaum,et al.  Flow structure and transport in the Yucatan Channel , 2002 .

[24]  J. Fiechter,et al.  Simulation of frontal eddies on the East Florida Shelf , 2003 .

[25]  R. Weisberg,et al.  Energetic baroclinic super‐tidal oscillations on the southeast Florida shelf , 2003 .

[26]  T. Rossby,et al.  Interannual variations in upper-ocean transport by the Gulf Stream and adjacent waters between New Jersey and Bermuda , 2005 .

[27]  J. Sheinbaum,et al.  Upper‐Layer Circulation in the Approaches to Yucatan Channel , 2013 .

[28]  P. Hamilton,et al.  Transports through the Straits of Florida , 2005 .