V. V. Kremenetskiy

• Ph.D.
• Senior Researcher at Institute of Oceanology. PP Shirshov Russian Academy of Sciences

Between 2010 and 2021, a pronounced warming was observed in the mid-depth water layer (~100-700 m) in the northeastern Black Sea attributed to the influence of Bosphorus-derived waters. During this period, the magnitude of positive temperature anomalies in Bosphorus intrusions along the southern limb of the Rim Current and in the northeastern part...

Biogeochemical cycles of carbon transformation throughout the euphotic zone of the sea are controlled by physical processes, e.g., daily thermocline, variation in solar irradiance, thermohaline convection, and intermittent mixing. These processes should be regularly observed with sufficient time resolution at fixed geographical locations. This stud...

An aerophotography of the experimental area on the Tuaphat massif (area of 6 ha, SBIO RAS) and a bathymetric survey of the adjacent water area have been made within the framework of the “Carbon test site in Krasnodar Region” development. Digital relief models (DRM) of the test site onshore and offshore components were developed based on the survey...

DOI: 10.29006/978-5-6045110-1-5 The paper describes some of the results of setting up the cluster of thermochains in the Blagopoluchia Bay (Novaya Zemlya archipelago). The short-time changes of water temperature at the water area of the bay, as well as the tidal characteristics there are presented.

Samples were collected in the area of the St. Anna Trough in the northern Kara Sea in September 2015 and July-August 2016. Based on salinity and temperature distribution, four areas have been distinguished: the shelf adjacent to the St. Anna Trough, the shelf edge, and the upper and lower parts of the continental slope. The variability of the struc...

The preliminary results of an experimental study of a mechanism of the Black Sea anoxic layer ventilation related with the descent of oxygen-containing water down the bottom slope in Ekman boundary layer are presented. To study this mechanism, several automatic measuring stations were installed at the bottom of the shelf-continental slope zone in t...

This article focuses on the interaction between the Ob- and Yenisei-dominated parts of the large Ob-Yenisei buoyant plume formed in the southern part of the Kara Sea during ice-free periods. It was shown that certain wind forcing and river discharge conditions cause the formation of a specific structure of the Ob-Yenisei plume with significantly di...

The paper describes a possible mechanism for the transformation of a desalinated water lens in the Kara Sea under the action of vertical turbulent mixing induced by wind. Using a simple one-dimensional model, we show that the strongest transformation occurs at the edge of the lens—its frontal zone, where the thickness of the desalinated layer is th...

The phytoplankton community and its distribution were investigated in the eastern branch of the St. Anna Trough and over the adjacent Kara Sea shelf in September 2011 and in August 2014. The spatial and seasonal differences in the phytoplankton structure were analyzed in connection with ice melting and changes in the temperature, salinity, and biog...

A new method for the calculating propagation of brackish waters from the Ob-Yenisei estuary in the Kara Sea is proposed. This method is based on satellite altimetry measurements and meteorological data. Surface currents in the upper layer are estimated as the sum of geostrophic and parameterized wind-driven transport. Geostrophic velocities are cal...

In the 59th cruise of the RV Akademik Mstislav Keldysh (September–October, 2011) a large amount of hydrophysical data was obtained with the help of various measuring systems. The data allowed us to study the dynamics and hydrological structure of deep-sea troughs of the western part of the Kara Sea at a high spatial resolution. In particular, the a...

The first data on the creation of the subsatellite polygon on the Black Sea shelf and continental slope in the Gelendzhik area (designed in order to permanently monitor the state of the aquatic environment and biota) and the plans for maintaining and developing this polygon are presented. The autonomous measuring systems of the polygon in the compo...

The area of about 40000 km(2) of desalinated upper layer waters with a salinity less than 25 psu was found during cruise 54 of R/V Akademik Mstislav Keldysh in the southwestern part of the Kara Sea (September 2007). The thickness of the desalinated layer was about 10 m and it was separated from underlying marine waters with salinity more than 30 ps...

Field studies performed at the Shirshov Institute of Oceanology, Russian Academy of Sciences (SIO RAS), Black Sea hydrophysical polygon in 2012 are illustrated. The variations in the vertical distribution of the hydrophysical characteristics (water temperature, salinity, and density, as well as current velocity) in the upper 200-m layer of the Blac...

As confined water bodies, the semi-enclosed and inland seas are particularly vulnerable to the global change. The climate change trends observed in the marginal seas reflect a spectrum of interactions between the ocean, atmosphere and the continents, and this is why their responses are generally more complex than those characteristic for the open o...

This study was aimed at identifying the locations of the submarine groundwater discharge (SGD) on the shelf of Southwestern Taiwan by means of oceanographic measurements, quantifying its influence on the hydrographic conditions in the area, and estimating the volume rates of the discharge. Two high resolution hydrographic surveys of the region, inc...

The research was performed along a transect from the Yamal Peninsula coast towards the outer shelf of the southwestern part of the Kara Sea in September 2007. 130 phytoplankton species have been identified, among which 63 were found in the area for the first time. The total phytoplankton numbers varied within the range of 0.2 to 11.3 × 109 cells/m2...

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.

A research was carried out along a transect from the Yamal Peninsula coast towards the outer shelf of the southwestern the Kara Sea in September 2007. 130 phytoplankton species were identified, among which 63 were found in the area for the first time. Total phytoplankton abundance varied from of 0.2 x10**9 to 11.3x10**9 cells/m**2, while biomass fr...

The studies were carried out on September 27–30, 2007, in the area of the Ob estuarine frontal zone and over the adjacent inner Kara Sea shelf. Based upon the latitudinal changes in the salinity, the 100 nautical mile wide estuarine frontal zone was marked out. The frontal zone was inhabited by a specific zooplankton community dominated by species...

An area of about 40000 km2 of desalinated upper layer waters with a salinity of less than 25 psu was found during cruise 54 of the R/V Akademik Mstislav Keldysh in the southwestern part of the Kara Sea (September 2007). Close to the boundary of this region located near the eastern coast of Novaya Zemlya, the salinity was less than 16 psu. The thick...

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 struc...

Sub-mesoscale (1-10 km) and short-term (1-100 hours) variability of hydrophysical structure and fluid dynamics at the narrow Black Sea shelf depends on a number of factors: wind forcing, fresh water runoff, fluid dynamics over the continental slope and deep part of the sea, coast relief and bottom topography. Influence of mentioned factors on the s...

The general element of the classical theory of the Black Sea basin-scale circulation is the Rim current (RC) flowing cyclonically along the continental slope. Broad oceanographic application of the satellite data during the past decades has also revealed energetic mesoscale eddy-like structures that provide an effective cross- basin exchange. The a...

A poorly known mechanism of formation of a warm coastal current by spatially nonstationary and nonuniform wind forcing in the northeastern part of the Black Sea is described. Owing to the blocking influence of the Caucasian Mountains, the northeasterly wind (nordost) west and east of Tuapse is characterized by a spatially nonuniform speed distribut...

The results of laboratory modeling of the effect of topography of the continental slope and variable wind forcing on the stability and structure of the near-shore current in a two-layered rotating fluid are presented. The basic parameters for the laboratory model were chosen to be dynamically similar to those for the Black Sea. It was found that a...

The hydrophysical parameters and zooplankton distribution along five 65-mile transects normal to the coast in the northeastern part of the Black Sea were examined on November 26-30, 2003. Water circulation featured a "classical" character with a well-pronounced cyclonic boundary current. Meanwhile, on different transects, current intensities and ve...

A large (80–90 km in diameter) anticyclonic eddy centered at 43°N, 37–38°E has been the subject of complex investigation in the summer-autumn of 1999 based on measurements carried out during the “Black Sea'99” expedition on board of R/V Akvanavt (CTD surveys, deployment of Argos-tracked drifters), analysis of satellite imagery, and using altimetric...

The intensification of the Main Black Sea (Rim) Current caused by wind forcing is revealed to be accompanied by the weakening of the mesoscale eddy dynamics and the associated horizontal (trans-shelf) water exchange, while the relaxation of the Rim Current in the absence or reduction of the wind (Ekman) forcing leads to the opposite effect. This co...

The effect of the meso- and basin-scale circulation on the spatial distribution of zooplankton was studied in the northeastern part of the Black Sea. The study was carried out during six cruises of R/V Akvanavt in the falls of 1999-2001. The basin scale circulation and mesoscale dynamics were quite different in these periods. In 1999 and 2001, the...