Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2015, Vol. 12, No. 3, pp. 171-184
Comparison of drifter and ADCP data in a subsatellite test site in the Black Sea
K.P. Silvestrova
1 , E.V. Krayushkin
2,3 , S.A. Myslenkov
1,2
1 P.P. Shirshov Institute of Oceanology RAS, Moscow, Russia
2 M.V. Lomonosov Moscow State University, Moscow, Russia
3 Space Research Institute RAS, Moscow, Russia
The paper investigates sea currents in a subsatellite test site near a town of Gelendzhik in the coastal zone of the Black Sea using drifters and vessel-mounted ADCP. During the experiment, underwater sails of the drifters were deepened to different depths so that their data could be compared with vertical profiles from ADCP. For current magnitudes less than 0.1 m/s, the ADCP yielded significant errors in current direction estimation. In the paper, a comparison of in situ measurements and remote sensing Modis Terra/Aqua and OLI Landsat-8 data, as well as numerical modeling results by the KUST software is performed. It is shown that currents calculated by satellite altimetry method for open sea regions agree well with the real ones obtained by the drifters. However, a submesoscale vortex formation near the Crimea shore was not resolved by the KUST software. The study demonstrates poor results of KUST in the coastal zone. Oceanographic expeditions still remain the only source of correct data on sea currents.
Keywords: drifter, ADCP, sea currents, Black sea, remote sensing, satellite altimetry, AVISO, KUST
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