The hydrometeorologic conditions facilitating shoaling of marketable fish off the Somali coast during summer monsoon

abtract The paper concentrates on the structure and synoptic variability of the meteorological, hydrophysical and chemical fields in the Somali continental shelf area during summer monsoon. Tidal front is shown to be a typical element of the water stratification in the studied area, whose state and dynamics thoroughly in.quence the fisheries situations. It has been found out that commercial aggregations of fishes regularly pooled up and dispersed in the frontal zone, depending on the natural synoptic-scale processes taking place. Translated by Vladimh" A. Puchkin.     

Vertical structure of geostrophic currents in the fields of density of water and hydrostatic pressure

We analyze geostrophic currents with nonmonotonic vertical profiles, of velocity and present the distributions of the density of water and hydrostatic pressure corresponding to possible types of the vertical kinematic structure. To prove the existence of the indicated complex layered structures, we use, the data of instrumentalin situ measurements of currents in the Black Sea and in the west part of the Tropical Atlantic. Translated by Peter V. Malyshev and Dmitry V. Malyshev     

Contemporary state of the investigation of the influence of the discharge of rivers on the hydrologic structure of the Black Sea

We generalize and analyze the state of investigations of the influence of river waters on the hydrologic structure of the Black Sea. Specific features of the water, regime and hydrography of rivers flowing into the sea, data on the discharge of rivers, and intrayear and interyear variability of the discharge are presented. We discuss and analyze works studying the transformation of river waters, routes of desalinized sea waters, and their influence on the thermohaline structure and dynamic regime of the sea. Translated by Peter V. Malyshev and Dmitry V. Malyshev