Referencing geostrophic velocities using ADCP data Referencing geostrophic velocities using ADCP data


  • Isis Comas-Rodríguez Facultad de Ciencias de Mar, Universidad de Las Palmas de Gran Canaria, Campus Universitario de Tafira
  • Alonso Hernández-Guerra Facultad de Ciencias de Mar, Universidad de Las Palmas de Gran Canaria
  • Elaine L. McDonagh National Oceanography Centre, Southampton, University of Southampton



ADCP data, CTD data, reference velocity, geostrophic velocity, velocity correction, North Atlantic Ocean


Acoustic Doppler Current Profilers (ADCPs) have proven to be a useful oceanographic tool in the study of ocean dynamics. Data from D279, a transatlantic hydrographic cruise carried out in spring 2004 along 24.5°N, were processed, and lowered ADCP (LADCP) bottom track data were used to assess the choice of reference velocity for geostrophic calculations. The reference velocities from different combinations of ADCP data were compared to one another and a reference velocity was chosen based on the LADCP data. The barotropic tidal component was subtracted to provide a final reference velocity estimated by LADCP data. The results of the velocity fields are also shown. Further studies involving inverse solutions will include the reference velocity calculated here.


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Baringer, M.O. and R. Molinari. – 1999. Atlantic Ocean baroclinic heat flux at 24 to 26°N. Geophys. Res. Lett., 26: 353-356. doi:10.1029/1998GL900323

Beal, L.M. and H.L. Bryden. – 1997. Observations of an Agulhas Undercurrent. Deep-Sea Res., 44: 1715-1724. doi:10.1016/S0967-0637(97)00033-2

Bryden, H.L., H.R. Longworth and S.A. Cunningham. – 2005. Slowing of the Atlantic meridional overturning circulation at 25°N. Nature, 438: 655-657. doi:10.1038/nature04385 PMid:16319889

Cunningham, S.A. – 2005. RRS Discovery Cruise D279, 04 Apr - 10 May 2004. A Transatlantic hydrographic section at 24.5°N. Southampton Oceanography Centre Cruise Report, No. 54, 198 pp.

Cunningham, S.A, T. Kanzow, D. Rayner, M.O. Baringer, W.E. Johns, J. Marotzke, H.R. Longworth, E.M. Grant, J.J.M. Hirschi, L.M. Beal, C.S. Meinen and H.L. Bryden. – 2007. Temporal variability of the Atlantic meridional overturning circulation at 26°N. Science, 317: 935-938. doi:10.1126/science.1141304 PMid:17702940

Egbert, G.D., A.F. Bennett and M.G.G. Foreman. – 1994. TOPEX/POSEIDON tides estimated using a global inverse model, J. Geophys. Res., 99(C12): 24,821-24,852. doi:10.1029/94JC01894

Egbert, G.D. and S.Y. Erofeeva. – 2002. Eficient Inverse Modeling of Barotropic Ocean Tides. J. Atmos. Ocean. Tech., 19: 183-204. doi:10.1175/1520-0426(2002)019<0183:EIMOBO>2.0.CO;2

Fischer, J. and M. Visbeck. – 1993. Deep Velocity Profiling with Self-contained ADCPs. J. Atmos. Ocean. Tech., 10: 764-773. doi:10.1175/1520-0426(1993)010<0764:DVPWSC>2.0.CO;2

Fuglister, F.C. – 1960. Atlantic Ocean Atlas of Temperature and Salinity Profiles and Data from the International Geophysical Year of 1957-1958. Woods Hole Oceanographic Institution Atlas Series, 1: 1-209.

Joyce, T. M., A. Hernández-Guerra and W. M. Smethie Jr. – 2001. Zonal circulation in the NW Atlantic and Caribbean from a meridional World Ocean Circulation Experiment hydrographic section at 66°W. J. Geophys. Res., 106(C10): 22,095-22,113. doi:10.1029/2000JC000268

Kanzow, T., S.A. Cunningham, D. Rayner, J.J.M Hirschi, W.E. Johns, M.O. Baringer, H.L. Bryden, L.M. Beal, C.S. Meinen and J. Marotzke. – 2007. Observed flow compensation associated with the MOC at 26.5°N in the Atlantic. Science, 317: 938-941. doi:10.1126/science.1141293 PMid:17702941

McDonagh, E.L., H.L. Bryden, B.A. King and R.J. Sanders – 2008. The circulation of the Indian Ocean at 32°S. Prog. Oceanogr., 79: 20-36. doi:10.1016/j.pocean.2008.07.001

Parrilla, G., A. Lavín, H. Bryden, M. García and R. Millard. – 1994. Rising temperatures in the subtropical North Atlantic Ocean over the past 35 years. Nature, 369: 48-51. doi:10.1038/369048a0

Roemmich, D. and C. Wunsch. – 1985. Two transatlantic sections: meridional circulation and heat flux in the subtropical North Atlantic Ocean. Deep-Sea Res., 32: 619-664. doi:10.1016/0198-0149(85)90070-6

Visbeck, M. – 2002. Deep Velocity Using Lowered Acoustic Doppler Current Profilers: Bottom Track and Inverse Solutions. J. Atmos. Ocean. Tech., 19: 794-807. doi:10.1175/1520-0426(2002)019<0794:DVPULA>2.0.CO;2




How to Cite

Comas-Rodríguez I, Hernández-Guerra A, McDonagh EL. Referencing geostrophic velocities using ADCP data Referencing geostrophic velocities using ADCP data. scimar [Internet]. 2010Jun.30 [cited 2023May30];74(2):331-8. Available from:




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