Physical Oceanography, Vol. 16, No. 4, 2006
AUTOMATION OF RESEARCH IN SEAS AND OCEANS
METHODICAL ASPECTS OF THE APPLICATION OF ACOUSTIC DOPPLER
CURRENT PROFILERS IN THE BLACK SEA
A. N. Morozov and E. M. Lemeshko
For the first time, an acoustic Doppler current profiler (ADCP) produced by the RDI is used in
the water area of the Black Sea in the lowered mode. This direction in the application of acoustic
Doppler current profilers is now in the stage of development and verification of various proce-
dures of measurements with subsequent data processing and enables one to get the distributions
of current velocities down to depths of
depending on the modification of the in-
strument. We describe the procedures of measurements performed with the help of the ADCP in
the lowered mode in the course of an expedition and the stages of processing of the primary data
based on the experience of application of similar acoustic current profilers at the Marine Hydro-
physical Institute of the Ukrainian National Academy of Sciences accumulated in the 1980s. We
generalize the experience of application of ADCP under the hydrological conditions of the Black
Sea, propose the algorithms of data processing, present the profiles of absolute current velocity at
several stations, compare these profiles with the geostrophic velocities, and determine the deep-
water structure of the field of currents in a shelf–open-sea section made along
The problem of shipboard measurements of the vertical profiles of current velocity in the sea is one of the
most urgent problems of contemporary applied oceanology. Parallel with the standard hydrological STD-data,
the instrumental estimates of the velocity of motion of waters enable us to significantly extend our knowledge
about the dynamic processes in seas and oceans. The first attempts of the vertical profiling of currents were per-
formed by using point rotor current meters both from the autonomous surface buoys  and from the board of a
ship . The existing strong need in the data of direct measurements of current velocity stimulated the intense
development of equipment aimed at the vertical profiling of currents and based on the monitoring of paths of
freely falling probes by the hydroacoustic methods . However, these methods of measurements cannot be
used for the rapid analysis of the field of current velocities due to significant time losses for sounding. Later, the
solution of this problem was mainly reduced to the development of the methods and instruments for the ship-
board vertical profiling of currents. One of possible directions of investigations aimed at the creation of the re-
quired equipment and based on the use of immersed three-component acoustic current-velocity transducers in-
cluding an STD-complex and gauges of angular orientation is developed at the Marine Hydrophysical Institute of
the Ukrainian National Academy of Sciences since the 1980s . These devices were not extensively used due
to the influence of motion of the instrument itself on the quality of accumulated information. The attempts to
take into account the contribution of this factor led to the creation of complicated systems of control of motion
[4, 5], which significantly restricted the technological efficiency of application of these instruments.
Marine Hydrophysical Institute, Ukrainian Academy of Sciences, Sevastopol.
Translated from Morskoi Gidrofizicheskii Zhurnal, No.
31–48, July–August, 2006. Original article submitted April 1, 2005.
216 0928-5105/06/1604–0216 © 2006 Springer Science+Business Media, Inc.