Andrey Korzh

Ocean County College, Atlantic Branch, Faculty Member

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Papers by Andrey Korzh

Development of experimental methods for the study of mesoscale processes for 30 years after K.N. Fedorov demise (1988–2018)

Proceedings of the International Symposium “Mesoscale and Submesoscale Processes in the Hydrosphere and Atmosphere” (MSP-2018), 30 October – 02 November 2018, Moscow / [Ed. by: Zatsepin A.G., Ginzburg A.I., Kostianoy A.G., Sviridov S.A.], Nov 2, 2018

The report is devoted to the memory of Konstantin Nikolaevich Fedorov, who had an invaluable infl... more The report is devoted to the memory of Konstantin Nikolaevich Fedorov, who had an invaluable influence on the setting of tasks for research of smallscale structure of physical fields of the ocean by experimental methods. The achievements of the team of authors in solving such problems are presented.

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Internal hydraulic jumps in the White Sea

Internal waves are extremely common phenomena in seas and oceans. However, they are poorly studie... more Internal waves are extremely common phenomena in seas and oceans. However, they are poorly studied in the White Sea. It seems that the dedicated measurements performed in the 80th expedition of R/V "Professor Shtokman" in August 2006 were the first ones on studying internal waves in the White Sea. The measurements were carried out at the diurnal mooring station and on many tacks with the use of the ADCP "Rio Grande 600 kHz" and the towed CTD operated in the "yo-yo" regime over the water space of the White Sea during the whole expedition. The most intense internal wave phenomena that we observed can be attributed to internal hydraulic jumps of two types. The fist one that is widely known consists in generating internal waves by a water stream above an underwater rise. The second type is associated with the hydraulic jump above a narrow underwater hollow. Such a phenomenon was observed by us in towing the acoustic doppler current profiler over the neck of...

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Intermediate plumes of low oxygen in the southeastern Baltic Sea

Oceanologia

Studies of the hydrophysical processes over the shelf and upper part of the continental slope of the Black Sea with the use of traditional and new observation techniques

Oceanology, 2008

Results of the studies of the spatiotemporal variability in the hydrophysical and hydrodynamical ... more Results of the studies of the spatiotemporal variability in the hydrophysical and hydrodynamical structure of the shelf area and its dependence on the water dynamics of the deep-water zone of the Black Sea off Gelendzhik are presented and discussed. The field materials were collected in early October of 2006 with the use of traditional and new measurement techniques. A combined analysis of on-line satellite oceanological information, data of onboard surveys, and data time series of the vertical profiling of the hydrophysical characteristics at a moored buoy station was performed.

Innovative Closely Spaced Profiling and Current Velocity Measurements in the Southern Baltic Sea in 2016–2018 With Special Reference to the Bottom Layer

Frontiers in Earth Science

A solution to the problem of determination of spatial variability of oceanographic fields, which ... more A solution to the problem of determination of spatial variability of oceanographic fields, which contained a fine structure resolution higher than what was possible previously using towed scanning probes, was presented for the Baltic Sea. Another concurrently solved problem consisted in obtaining data on the structure of waters in the bottom layer, which was difficult to implement by way of application of previous methods. Instead of scanning along inclined paths, a new measurement technique allows for a quasi-free probe drop with a constant sink rate and which reaches the bottom at each dive cycle along the route of the ship, independent of the pitch of the ship and optimal for the applied probe. The new measurement technique is simpler and more efficient than the previous one. In addition, the problem of measuring the velocity of both very weak and strong currents in a thin bottom layer, including stagnant zones, slopes, sills, and underwater channels, was suggested to be solved using clusters consisting of a sufficiently large number of autonomous Tilt Current Meters (TCM) of original design. The innovation benefits are illustrated by the results of a monitoring campaign that was carried out in the southern Baltic Sea in 2016-2018. Among the new findings is the highest ever recorded temperature, 14.3 • C, in the halocline of the Bornholm Basin, measured after a baroclinic inflow event in early Autumn 2018, and an extraordinarily large current velocity of saltwater flow of more than 0.5 m/s, recorded by a TCM within a 1 m thick bottom layer at the eastern slope of the Hoburg Channel during a period when the northwesterly wind had intensified to a severe gale.

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Studies of the hydrophysical processes over the shelf and upper part of the continental slope of the Black Sea with the use of traditional and new observation techniques

Oceanology, 2008

Studies of the hydrophysical processes over the shelf and upper part of the continental slope of the Black Sea with the use of traditional and new observation techniques

Oceanology, 2008

Distinctive features of water exchange across the Słupsk Sill (a full-scale experiment)

OCEANOLOGIA

ABSTRACT

Multidisciplinary studies of the caspian sea system during cruise 39 of the R/V Rift

Oceanology

Multidisciplinary Investigations in the Caspian Sea during Cruise 39 of R/V “Rift”

Comprehensive study of the Caspian Sea system during the second cruise of the research vessel Nikifor Shurekov

Oceanology, 2015

Comprehensive studies of the Caspian Sea system during cruise 35 of the R/V Rift

Oceanology, 2012

Variability of currents in the coastal zone of the Black Sea from long-term measurements with a bottom mounted ADCP

Oceanology, 2012

ABSTRACT

Meso-scale water structure in the southern Baltic in the summer of 2006

Journal of Marine Systems, 2008

ABSTRACT

Studies of the hydrophysical processes over the shelf and upper part of the continental slope of the Black Sea with the use of traditional and new observation techniques

Oceanology, 2008

Influence of the dynamics of currents on the hydrophysical structure of the waters and the vertical exchange in the active layer of the Black Sea

Oceanology, 2007

An analysis of the data of measurements of the fine structure and microstructure fluctuations of ... more An analysis of the data of measurements of the fine structure and microstructure fluctuations of hydrophysical fields in the upper 200-m layer of the Black Sea carried out using CTD profilers and a Baklan free falling microstructure and turbulence profiler revealed the existence of a positive correlation between the intensity of the fine structure and microstructure fluctuations and the dynamics of the currents. On the other hand, the level of the fine structure and microstructure fluctuations reflects the rate of the vertical turbulent exchange. It was shown that, in the case of the absence of the Black Sea Rim Current (BSRC) jet or clearly manifested mesoscale eddy structures, the vertical turbulent exchange in the pycnocline is weak, while, in the opposite case, it is stronger. The results obtained support the supposition that the interbasin dynamics play an important role in the maintenance of the rate of small-scale mixing in the pycnocline and halocline and provide the vertical transport of dissolved oxygen from the cold intermediate layer into the deeper layers of the sea.

Studies of the hydrophysical processes over the shelf and upper part of the continental slope of the Black Sea with the use of traditional and new observation techniques

Oceanology, 2008

Submesoscale eddies at the caucasus Black Sea shelf and the mechanisms of their generation

Oceanology, 2011

The results of observations of submesoscale eddies (with a diameter of 2-8 km) on the narrow Blac... more The results of observations of submesoscale eddies (with a diameter of 2-8 km) on the narrow Black Sea shelf are presented. These observations were carried out in the Gelendzhik region in the autumn seasons of 2007-2008 using traditional and new methods of hydrophysical investigations. The mechanisms of generation of such eddies are discussed.

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Influence of the dynamics of currents on the hydrophysical structure of the waters and the vertical exchange in the active layer of the Black Sea

Oceanology, 2007

Circulation in the southwestern part of the Kara Sea in September 2007

Oceanology, 2010

During cruise 54 of the R/V Akademik Mstislav Keldysh to the southwestern Kara Sea (September 6 t... more During cruise 54 of the R/V Akademik Mstislav Keldysh to the southwestern Kara Sea (September 6 to October 7, 2007), a large amount of hydrophysical data with unique spatial resolution was obtained on the basis of measurements using different instruments. The analysis of the data gave us the possibility to study the dynamics and hydrological structure of the southwestern Kara Sea basin. The main elements of the general circulation are the following: the Yamal Current, the Eastern Novaya Zemlya Current, and the St. Anna Trough Current. All these currents are topographically controlled; they flow over the bottom slopes along the isobaths. The Yamal Current begins at the Kara Gates Strait and turns to the east as part of the cyclonic circulation. Then, it turns to the north and propagates along the Yamal coast over the 100-m isobath. The Eastern Novaya Zemlya Current (its core is located over the eastern slope of the Novaya Zemlya Trough) flows to the northeast. Near the northern edge of Novaya Zemlya, it encounters the St. Anna Trough Current, separates from the coast, and flows practically to the east merging with the continuation of the Yamal Current. A strong frontal zone is formed in the region where the two currents merge above the threshold that separates the St. Anna Trough from the Novaya Zemlya Trough and divides the warm and saline Arctic waters from the cooler and fresher waters of the southwestern part of the Kara Sea. This threshold, whose depth does not exceed 100–150 m, is a barrier that prevents the spreading of the Barents Sea and Arctic waters to the southwestern part of the Kara Sea basin through the St. Anna Trough.

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Development of experimental methods for the study of mesoscale processes for 30 years after K.N. Fedorov demise (1988–2018)

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Internal hydraulic jumps in the White Sea

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Intermediate plumes of low oxygen in the southeastern Baltic Sea

Oceanologia