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The report summarizes the results of research on the topic of the report carried out by the authors in 2017-2019 as part of the study of climate change problem. The purpose of the research is the approximate physical and cost assessment of ecosystem services of binding, long-term deposition and fossilization of excess atmospheric carbon dioxide by marine ecosystems. The object of research is dissolved organic matter (DOM) as a large reservoir of atmospheric carbon deposition in the seas of Northern Pacifica. The s...

The content of pollutants in the bottom sediments of coastal waters with limited water exchange characterize the total load on the water area and catchment of bays. This paper presents the definition of the total content of trace elements such as Cr, Co, Ni, Pb, Zn, V, Sr (mg/kg) and metal oxides TiO2, MnO, Fe2O3 (%). Samples were taken in the surface layer of bottom sediments of the Sevastopol Bay in 2016. The bottom sediments of the Sevastopol bays accumulate a wide range of organic and inorganic pollutants ente...

The article presents the materials of research conducted in the North of European Russia since 2004. We have studied soil, water and bottom sediments of rivers and lakes, biomaterials of the river inhabitants, and ground vegetation. For more than a 10-year period were accumulated actual data on concentrations of mercury in various components of the ecosystem of the mouth area of the Northern Dvina River, especially the interesting situation with the environment around pulp and paper mills (PPM). The main factor de...

The capacity of macroalgae for bioaccumulation of harmful elements is beneficial from the point of view of water treatment processes. Nevertheless, it is a threat to marine biocenoses, particularly to organisms on the individual levels of the trophic chain. Since algae have a great potential to bind trace elements, these organisms are often used as indicators of marine environment pollution. The aim of this study was to assess the content of Pb, Cd, B and Ba in water and algae collected in the region of Makarska R...

The paper aims to assess the macrobenthic diversity and habitats distribution in front of the Danube mouth along a depth gradient on the Romanian Black Sea shelf. During the reference 60 - 70?s period the benthic community diversity accounted for 75 species. In the 80?s (starting of eutrophication period) this has sharply decreased to 45 species as result of the ecological collapse due to economic development of the riverine Black Sea countries?. However, the area is naturally under the influence of the riverine i...

The Black Sea is referred to as a continental or semi-enclosed sea being connected with the Mediterranean Sea by Bosporus and Dardanelles straits and with the Azov Sea by Kerch Strait. The volume of water exchanged with the Mediterranean Sea is modest; thus the waters under 100 m depth are known as anoxic, and a high concentration of H2S is present. Taking into account its particular situation is a piece of evidence that even small slicks of oil discharged from operational purposes or by accident seriously affect ...

During the experimental and theoretical studies of the sea surface in the infrared range, it was proved that the microbubble air layer of the sea surface discovered earlier can be used as an indicator of the magnitude of the heat flux on the border of the sea-atmosphere. The result was obtained by developing a method for the simultaneous determination of the reflection coefficients, temperature and wave state of the sea surface measuring the radiation of the sea surface and atmosphere in the infrared range in a wi...

Data on detailed geochemical research reveal the specific features of the bottom sedimentation. Changes in sedimentation are caused by climate impact, chemical weathering intensity, distance from the source area, basin redox conditions and many other factors. Values of petrochemical modules (CIA, Fe/Mn, Ba/Sr, Sr/Ca) show changes in physical and geographical conditions and their influence on the sediments composition. Reconstruction of the paleoecological conditions of the environmental development based on geoche...

Northern European Seas environment has different sources of radionuclide contamination, both natural and artificial. In present work the radionuclide content of sediment samples (obtained in 2016-2018) of Keret Bay of Chupa Estuary, Kandalaksha Gulf of a semi-enclosed Arctic sea ? White Sea, Russia has been studied. Keret Bay is a small semi-isolated tidal estuary in the South-West part of Kandalaksha Gulf. The mouth of Keret river affected by strong tidal motion and spring flood. We have taken sediment samples in...

The Gulf of Finland belongs to the large gulfs of the Baltic Sea. The Eastern part of the Gulf of Finland is an estuary of the Neva River. The climate of the Gulf of Finland region is intermediate between marine and continental. Cyclonic atmosphere circulation prevails over the Gulf of Finland throughout the year. The heterogeneity of water masses in the Eastern part of the Gulf of Finland is closely related to significant spatial variability of salinity and water temperature. Water salinity strongly depends on in...

The added value generated by the fisheries sector in 2017 was only 0.15% of the total value added in Latvia, in the meantime its significance in external trade was higher, as the sector accounted for 1.8% of the total value of export production (EUR 206 million). The export capacity of the fishing sub-sector is mostly determined by the development of the fish processing sub-sector. Canned fish form 35% of the Latvian exports but this product group faces challenges of product and market reorientation due to decreas...

Seasonal and interannual variability of the Ekman pumping velocity in the Black Sea is studied based on ERA-Interim reanalysis data of 10 m wind speed for the period 1979?2015. Upward Ekman pumping prevails in the annual cycle due to the predominance of the cyclonic wind curl over the Black Sea. The maximum upward Ekman pumping occurs in winter. In June, the basin averaged pumping velocity is directed downwards. The magnitude and spatial distribution of the Ekman pumping velocity depends on the direction of the wi...

Accumulation of trace elements in aquatic organisms is an important problem associated with environment pollution and with their utilization for consumption purposes. The aim of the conducted research was to assess the content of Zn, Co and Ba in water and in selected organs of fish of blotched picarel (Spicara maena L.) and haddock (Merlangius euxmus L.), from Karantinna and Balaklava Bays in the region of Sevastopol. The second aim was to determine the level of bioaccumulation of these elements in organisms used...

In 1900, just at the end of the Little Ice Age, a present day fjord valley was filled with a huge glacier, Hambergbreen, which protruded into the Barents Sea. By 1936, a weakly incised bay, named Hambergbukta, appeared at the glacier?s front due its retreat. Afterwards, the glacier?s recession and frontal retreat have continued until the end of the 1950s, when a fjord appeared. This frontal retreat was reversed by the glacier?s surge which filled up the fjord valley with the fissured glacier?s tongue just after 19...

Zooplankton plays a significant role within the Black Sea ecosystem, contributing to the top ? down regulation of trophic web, by intermediating vital ecological processes such as the nutrients recycling (e.g., by controlling phytoplankton and bacterial aggregates development) within the pelagic and benthic habitats. It is considered an important indicator of ecosystem health, being a quality assessment element within the Water Framework Directive (2000/60/EC). Based on the 55 samples collected in the Romanian wat...