Subjects -> EARTH SCIENCES (Total: 771 journals)     - EARTH SCIENCES (527 journals)    - GEOLOGY (94 journals)    - GEOPHYSICS (33 journals)    - HYDROLOGY (29 journals)    - OCEANOGRAPHY (88 journals) OCEANOGRAPHY (88 journals)
 Showing 1 - 77 of 77 Journals sorted by number of followers Deep Sea Research Part II: Topical Studies in Oceanography       (Followers: 29) Deep Sea Research Part I : Oceanographic Research Papers       (Followers: 23) Estuaries and Coasts       (Followers: 23) Limnology and Oceanography       (Followers: 22) Progress in Oceanography       (Followers: 21) Journal of Marine Biology & Oceanography       (Followers: 19) New Zealand Journal of Marine and Freshwater Research       (Followers: 18) Journal of Physical Oceanography       (Followers: 18) Frontiers in Marine Science       (Followers: 17) Journal of Marine Sciences       (Followers: 17) Coastal Engineering       (Followers: 15) Advances in Oceanography and Limnology       (Followers: 15) Journal of Oceanography       (Followers: 14) Maritime Studies       (Followers: 13) International Journal of Oceanography       (Followers: 12) Advances in Statistical Climatology, Meteorology and Oceanography       (Followers: 11) Atmospheric and Oceanic Science Letters       (Followers: 10) Bulletin of Marine Science       (Followers: 9) Fisheries Oceanography       (Followers: 8) Journal of Oceanography and Marine Science       (Followers: 7) Open Journal of Marine Science       (Followers: 6) Limnology and Oceanography: Methods       (Followers: 6) Journal of Operational Oceanography       (Followers: 6) Physical Oceanography       (Followers: 6) Paleoceanography and Paleoclimatology       (Followers: 5) Marine Science       (Followers: 5) Limnology and Oceanography: Fluids and Environments       (Followers: 5) Ocean Yearbook Online       (Followers: 4) Journal of Oceanology and Limnology       (Followers: 4) Limnology and Oceanography Letters       (Followers: 4) Journal of Marine Science and Engineering       (Followers: 4) African Journal of Marine Science       (Followers: 4) Oceanology       (Followers: 3) Journal of Aquatic Sciences       (Followers: 3) Limnology and Oceanography e-Lectures       (Followers: 3) Journal of Coastal Development       (Followers: 3) Ciencias Marinas       (Followers: 3) Journal of Marine Science and Application       (Followers: 3) Journal of Ocean Engineering and Marine Energy       (Followers: 3) Tropical Oceanography       (Followers: 2) Indian Journal of Geo-Marine Sciences       (Followers: 2) Mediterranean Marine Science       (Followers: 2) Regional Studies in Marine Science       (Followers: 2) Annals of Marine Science       (Followers: 2) Limnology and Oceanography: Bulletin       (Followers: 2) Annals of Limnology and Oceanography       (Followers: 2) Development and Applications of Oceanic Engineering       (Followers: 2) Journal of Ocean Engineering and Technology       (Followers: 1) Ocean Life       (Followers: 1) Marine Systems & Ocean Technology       (Followers: 1) Journal of Ocean University of China (English Edition)       (Followers: 1) Marine Life Science & Technology       (Followers: 1) Journal of Ocean Engineering and Science       (Followers: 1) Coastal Engineering Proceedings : Proceedings of the International Conference on Coastal Engineering       (Followers: 1) Marine Technology Society Journal       (Followers: 1) Scientia Marina       (Followers: 1) Western Indian Ocean Journal of Marine Science       (Followers: 1) Asian Journal of Fisheries and Aquatic Research Thalassas : An International Journal of Marine Sciences Oceans Aquatic Research Jurnal Kelautan Tropis Acta Aquatica : Aquatic Sciences Journal Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Journal of Agricultural and Marine Sciences Turkish Journal of Maritime and Marine Sciences Arquivos de Ciências do Mar Scientific Drilling Jurnal Kelautan : Indonesian Journal of Marine Science and Technology Oceanologia Revista de Gestão Costeira Integrada Revista Ciencias Marinas y Costeras Egyptian Journal of Aquatic Research China Ocean Engineering Revista de Biología Marina y Oceanografía Latin American Journal of Aquatic Research Acta Oceanologica Sinica
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 OceanologyJournal Prestige (SJR): 0.371 Citation Impact (citeScore): 1Number of Followers: 3      Hybrid journal (It can contain Open Access articles) ISSN (Print) 1531-8508 - ISSN (Online) 0001-4370 Published by Springer-Verlag  [2467 journals]
• Methane Concentration and δ13C Isotopic Signature in Methane over Arctic
Seas in Summer and Autumn 2020

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Abstract: We have studied the assessment of methane content in the near atmospheric layer of the Arctic seas and the sources of its emissions. Continuous atmospheric measurements of methane concentration and δ13C isotope signature in methane were carried out during two expeditions aboard the R/V Akademik Mstislav Keldysh in the summer and autumn of 2020. The minimum CH4 concentration (mean 1.937 ± 0.010 ppm) were obtained over the North and Norwegian Seas. The maximum CH4 concentration took place above the Kara (1.998 ± 0.030 ppm on average, maximum values are up to 2.000–2.040 ppm) and White (2.006 ± 0.030 ppm on average) seas. The average values of δ13C in the studied region were close to that typical for the Northern Hemisphere: –47.5‰. Regional changes in δ13C allowed CH4 sources to be identified and showed that the methane concentration in the surface atmospheric level is mainly affected by the direction of air-mass advection.
PubDate: 2022-12-01

• Geophysical Studies of the Northwestern Japan Sea on the 78th Cruise of RV
Professor Gagarinsky

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Abstract: During the 78th cruise of R/V Professor Gagarinsky, geophysical studies of the shelf, continental slope, and abyssal basin of the northwestern Japan Sea were carried out. New data are obtained on the structure of the seabed, the structure of the sedimentary cover, and the features of the magnetic field.
PubDate: 2022-10-01

• Exploring the Current State and Dynamics of Benthic Communities in the Sea
of Japan and Bering Sea (Cruise 93 of R/V Akademik M.A. Lavrentyev)

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Abstract: On cruise 93 of the R/V Akademik M.A. Lavrentyev (2021), we studied benthic communities in the Gamov Canyon (Sea of Japan), off the eastern coast of Kamchatka, and methane seep communities of the Koryak slope (Bering Sea); in addition, data were obtained on the sea-air mercury flux. The studies confirm the potential of the Gamov Canyon as a model site for long-term monitoring. We document significant changes in the structure and composition of the fauna compared to 2018 in the background and methane seep communities of the Koryak slope.
PubDate: 2022-10-01

• Geological and Geophysical Studies of the Double Transform Fault Charlie
Gibbs (North Atlantic) during Cruise 50 of R/V Akademik Nikolaj Strakhov

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Abstract: This paper provides information on the geological and geophysical studies of the structure of the Charlie Gibbs megatransform system in the North Atlantic on cruise 50 of R/V Akademik Nikolaj Strakhov in September–October 2020. The preliminary results of the expedition are discussed.
PubDate: 2022-10-01

• Oceanographic and Ecosystem Studies in the Atlantic Sector of Antarctica
(Cruise 87 of the Research Vessel Akademik Mstislav Keldysh)

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Abstract: An expedition to study the ecosystems of the Atlantic sector of the Antarctic was carried out in cruise 87 of R/V Akademik Mstislav Keldysh between January 19 and February 14, 2022. The studies were carried out in the key regions for understanding modern processes in the ecosystem of the Southern Ocean and in the regions of interest for Russian fisheries, namely, the Powell Basin of the Weddell Sea, the Bransfield Strait, Antarctic Sound, and at the test site east of the South Orkney Islands. Materials characterizing the state of the environment, pelagic communities, including the population of the Antarctic krill and mesopelagic fish, benthic fauna, and the spatial and temporal variability of the most important components of ecosystems, were obtained.
PubDate: 2022-10-01

• Expeditionary Studies of the Current State of the Volga River Avandelta
Ecosystem during the Flow Period

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Abstract: As a result of the work of the expedition of the Institute of Oceanology in May 2021, the absolute values of the main hydrophysical, hydrochemical, geochemical, and biological characteristics of the water area of the western part of the Volga River Delta and the adjacent shelf are obtained. The lowering of the Caspian Sea level is leading to an increase in the slow runoff, which appears to be leading to a decrease in the amount of nutrients entering the shelf and a restructuring of the functioning of the ecosystem of the seaward edge of the delta front.
PubDate: 2022-10-01

• Tidal Sea Level Oscillations in the Sea of Azov

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Abstract: Longterm hourly data from 14 coastal tide gauges are used to study the features of tides in the Sea of Azov. The spectral analysis shows the presence of well-defined spectral peaks at tidal diurnal and semidiurnal frequencies. Harmonic analysis of tides for the individual annual sea level series followed by vector averaging over the entire observation period was applied to estimate the mean amplitudes and phases of 11 tidal constituents. The amplitude of the major diurnal harmonics is generally greater than the semidiurnal amplitudes. The amplitude of the diurnal radiational constituent S1 changes from 6 cm at the head of Taganrog Bay to 0.5 cm in the Kerch Strait, while the amplitude of the main semidiurnal gravitational harmonic M2 inside the sea area varies from 1.0 cm in the southeastern part of the Sea of Azov to 0.38 cm at Mysovoye. The tidal form factor within the Sea of Azov changes significantly from the diurnal form in the north to a mixed, mainly semidiurnal, form near the Kerch Strait. The maximum theoretical tidal range of 19.5 cm was found at the head of Taganrog Bay, and the lowest value of 4.9 cm was noted in the Kerch Strait. The assumption about the predominantly radiational genesis of diurnal tides is confirmed by the seasonal variations of their spectrum. Radiational tides in the Sea of Azov may be initiated by sea breezes, especially in summer.
PubDate: 2022-10-01

• The Thermal Regime of Japan (East), Okhotsk Seas, and Pacific Ocean Waters
Adjacent to Sakhalin and Kuril Islands

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Abstract: The long-term dynamics of the thermal regime of sea waters in the Sakhalin-Kuril Region is poorly studied. At the same time, external environmental factors are decisive in the formation of the structure and size of the stocks of commercial hydrobionts, the most abundant representatives of ecosystems. Data on the temperature of the water surface and the upper quasi-homogeneous layer of the sea were obtained in the course of long-term ship and satellite observations at test sites located in the waters of the Sea of Japan, the Sea of Okhotsk, and the Pacific Ocean adjacent to the islands. The regional features of changes in the thermal regime of the waters, due to the nature of coastal currents and the effect of local climatic conditions, are revealed. Throughout the region, the similar dynamics of the long-term trends for warming and cooling of the thermal regime during 1998–2020 is traced.
PubDate: 2022-10-01

• Mineral and Chemical Composition of Surface Bottom Sediments in Some
Regions of the Nordic Seas

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Abstract: The mineral and bulk chemical (basic rock-forming oxides) composition of more than 20 samples of surface bottom sediments taken on a number of cruises of R/V Akademik Mstislav Keldysh in the Nordic Seas (the Mona, Knipovich, Kolbeinsey, and Aegir ridges, the basins of the Norwegian and Greenland seas, the continental slope of Svalbard, the western continental margin of the Barents Sea, etc.) is considered. One of the goals of these cruises was a comprehensive study of the sedimentary system of the Nordic Seas. Our data on the distribution of quartz and calcite in the sediments confirm the idea that the composition of surface bottom sediments at coastal stations is affected by the material coming from the land, while the seaward sediments are affected by the relatively warmer Atlantic waters, leading to their dilution with calcium carbonate, which are mainly produced by planktonic foraminifera. The absence of a correlation between $${\text{F}}{{{\text{e}}}_{{\text{2}}}}{\text{O}}_{3}^{*}$$ /SiO2 and Al2O3/SiO2 indicates the effect of mineralogical sorting is not pronounced in the sediments. The distribution of the data points of surface bottom sediments on the Ti/Al–1000*(Cr/Al) diagram is considered. It is concluded that the source of fine aluminosiliciclastics for most of the studied samples is both acidic and basic igneous rocks (volcanic rocks of Iceland) in different proportions. The value of Strakhov’s modulus in the entire sample ranges from 5 to 10. This gives grounds to believe that no products of hydrothermal activity were introduced into the surface bottom sediments of the areas studied by us.
PubDate: 2022-10-01

• Estimation of Primary Production in the Northern Part of the Sea of Japan
in Various Seasons by Ship- and Satellite-Based Observations

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Abstract: The data of ten cruises carried out in the northwestern part of the Sea of Japan (36°–47° N and 130°–141° E), including the coastal waters of Russia, from February to November in 2000–2015 are analyzed, which allows us to consider the features of primary production in different seasons in detail. The results of ship-based CTD observations, the concentrations of nutrients and chlorophyll-a (Chl), as well as satellite remote sensing ocean color data. At the beginning of the spring period, the maximum Chl and primary production (P) values are observed in the surface layer, and from May after the establishment of summer stratification, the bulk of Chl and high values of P are observed in the subsurface 20–40 m layer. In mid-October, the destruction of the summer stratification occurs and the supply of nutrients to the euphotic layer increases, as a result of which the concentration of Chl also increases. The value of annual P in the layer of photosynthesis according to the ship measurements is approximately twice as high as the satellite estimates of 400 and 224 g C/m2 year, respectively. The reasons for such differences are analyzed.
PubDate: 2022-10-01

• Effect of Interannual Variations of River Runoff on the Geochemistry of
Estuarine Sediments

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Abstract: Using the example of an estuary of a medium-sized river in the boreal zone (Razdolnaya River, Primorsky Krai, Russia), it is shown that even a 5–6-fold increase in the average annual river runoff is accompanied by only a 10–20% increase in the content of fine fractions in the surface 1–2 cm layer of bottom sediments located within the outer part of the estuary: Amur Bay, Sea of Japan. The chemical composition of the sediments of the inner estuary located within the riverbed is controlled mainly by variations of the grain size. In the outer estuary, pollution from Vladivostok city is an additional factor that increases the content of Hg, Cd, Pb, Cu, and Zn in the upper 30–35 cm sediment layer. The concentrations of Mo and Corg are also elevated in the sediments of the outer estuary, but this is due to accumulation in the reductive diagenesis for Mo and increased plankton production for Corg. It is possible to estimate the vertical distribution of the characteristics in the upper layer of estuarine sediments only by taking into account the rate of sedimentation, which allows us to highlight periods of anthropogenic pollution and the effect of the dynamics of the destruction of organic matter (OM).
PubDate: 2022-10-01

• Spring Picophytoplankton of the Kara Sea

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Abstract: The abundance, biomass, chlorophyll “a” concentration of picophytoplankton, contribution of picoalgae to total chlorophyll “a” and species composition of phototrophic picoeukaryotes (cells size less than 3 µm) were studied during 83 cruise of R/V Akademik Mstislav Keldysh in the Kara Sea in June 2021. The picophytoplankton abundance varied from 0.25 to 4.91 × 109 cell/m3, biomass–from 0.34 to 2.49 mg С/m3. The minimum abundance and biomass were found in the areas adjacent to the ice edge. The contribution of picophytoplankton to total chlorophyll a concentration in photic layer varied from 3 to 28% with maximum found in the stations free of ice more than 5 days. Picophytoplankton was represented by picoeukaryotes and cyanobacteria. The cyanobacteria contribution was low and varied from 0.2 to 1.8%. The Illumina sequencing of V4 region of 18S rRNA gene revealed that in the surface layer Chaetoceros socialis dominated in picoeukaryotes near ice edge during the diatom bloom. In the ice-free areas for more than 5 days small flagellates, such as Micromonas polaris, Phaeocystis pouchetii and Pyramimonas diskoicola, begin to develop in the surface layer after large phytoplankton descends to the lower horizon of upper mixed layer.
PubDate: 2022-10-01

• Studies of the Seasonal Variability of Oxygen, Apparent Oxygen
Utilization, and Chlorophyll-A in the Northeastern Part of the Black Sea
in 2012

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Abstract: The results of the analysis of the variability of the concentration of dissolved oxygen and chlorophyll-a (Chl-a), as well as the values of apparent oxygen utilization (AOU), in a 5-mile transect perpendicular to the coastline of Golubaya Bay (Gelendzhik), in April–November 2012, are presented. It is shown that the maximum oxygen content during the study period in most cases is observed in the thermocline layer or immediately below it, and the minimal values of AOU (negative values reflecting the maximal photosynthetic oxygen release) are above the thermocline. The maximum content of Chl-a is most often at a depth of 10 to 20 m; i.e., in spring and summer, for the most part, it is located within the thermocline, and in autumn, above it. It is shown that the oxygen content in the upper water layer is largely determined by the solubility of the gas in the sea water at the given temperature and salinity. Biological processes of oxygen release and consumption (production and destruction of organic matter) have a lesser effect on its seasonal dynamics in the upper layer. In the water layer under the thermocline, the AOU can serve as an indicator of destructive processes.
PubDate: 2022-10-01

• Experience of Using the Autonomous Underwater Vehicle MMT-3000 for
Research on Benthic Communities in Antartica

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Abstract: The article describes the features and results of using the autonomous underwater vehicle (AUV) MMT-3000 for research of Antarctic ecosystems and deep-sea biological resources of the South Seas. The methodology for working with an AUV in the extreme conditions of Antarctica and the technical solutions used to visually assess the distribution of bottom animals are discussed. The results of processing the data obtained by AUV during deep-sea missions in the Atlantic sector of the Antarctic during the expedition of the RV Akademik Mstislav Keldysh (cruise 79) in 2020 are presented. At the same time, the data of image analysis and trawl catch were compared. Based on the experience gained, the requirements to be implemented in the new AUV MMT-3500, which is designed and manufactured to effectively carry out deep-sea research in subsequent expeditions in the Southern Ocean, are determined.
PubDate: 2022-10-01

• Effect of Bottom Currents on Recording Seismic Signals on the Seabed

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Abstract: The recording of seismic signals at the bottom of water areas is in most cases accompanied by intense noise, whose sources are near-bottom currents. An effective way has still not been found to combat this phenomenon, which significantly impedes the development of a marine seismological network. The main problems are that such interference is generated both on equipment elements, which, according to the operating conditions, should be on the bottom surface, and on the unevenness of the bottom surface. In this study, a number of mechanisms for exciting such interference are considered, including due to the direct impact of stationary and nonstationary flows on the sensitive elements of bottom seismographs and due to the generation of seismoacoustic fields in the aquatic environment during vortex and turbulent flows. The results of recording seismic signals on the bottom, in the sediment layer, and in the bottom borehole in the presence of intense noise from currents are compared. A number of practical recommendations are given to significantly reduce the impact of such noise.
PubDate: 2022-10-01

• The Laws of Waterfowl Motion and Their Use in the Movement of Underwater
Objects

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Abstract: In terms of an ideal incompressible fluid, the flow of a thin wing of finite span, which simulates the work of a dolphin’s tail fin, is considered. The motion of a dolphin performing periodic oscillations perpendicular to the direction of the main motion with its tail fin with an almost uniform and rectilinear motion of the center of mass is studied. The flow around an oscillating wing operating in the mode of creating a thrust force with the formation of a swirling trace behind the wing is studied. The model parameters are selected according to the data of the experimental observations. A numerical solution of the problem is obtained with calculations of the kinematic and power characteristics of the dolphin tail fin model.
PubDate: 2022-10-01

• Change in the Chemical Composition of Sediments in Contact Zones with
Basalt Sills, Guaymas Basin, Gulf of California (DSDP 478 borehole)

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Abstract: The example of the Guaymas Basin in the Gulf of California (DSDP 478 borehole) shows the change in the chemical composition of the Upper Pleistocene sediments in specific short-term hydrothermal systems that arise when basalt sills intrude into nonlithified cold highly porous sediments with sea water. Changes in the chemical composition of the sediments (turbidites interbedded with hemipelagic sediments) in contact zones with basalt sills in Guaymas Basin in the Gulf of California are studied by X-ray fluorescence (XRF) analysis and inductively coupled plasma mass spectrometry (ICP-MS).
PubDate: 2022-10-01

• Oceanological Research of the Baltic Sea in the 51st Cruise of the PV
Akademik Sergey Vavilov (June–July 2021)

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Abstract: The 51st cruise of the PV Akademik Sergey Vavilov (June 30–July 14, 2021) included the study of redox conditions in the Baltic Sea deeps. Water temperature in the upper quasi-uniform layer significantly exceeded average climatic values for July, especially in the Gulf of Finland (by 7–7.5°С) due to abnormally hot weather. A setup of cyanobacterial aggregates from the subsurface layer to the surface was observed, it occurred earlier than normal. In cooperation with the Immanuel Kant Baltic Federal University an integrated survey was carried out at the Kaliningrad carbon polygon and the IV International Summer School “Coastal Sea Zone: Research, Management and Perspectives” was held.
PubDate: 2022-08-01
DOI: 10.1134/S0001437022040130

• Systems Research of Sedimentation in the European Arctic during the 84th
Cruise of the Research Vessel Akademik Mstislav Keldysh

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Abstract: Research regarding the conditions and processes of paleo- and modern sedimentation with an assessment of particles and pollution fluxes, with determination of the rates of biogeochemical processes and regional paleoclimatic reconstructions in the contact area of cold Polar and warm Atlantic water masses under the influence of cold (seep) and hot (hydrothermal) fluids were carried out during the expedition in the Norwegian-Greenland Sea Area and the Barents Sea. The consequences of atlantification are recorded in all components of the geosystems of the Barents Sea and the high-latitude Arctic as well as the reverse effect of the Arctic amplification on the geosystems of the northern North Atlantic occurring both at the present time and in the Pleistocene and Holocene.
PubDate: 2022-08-01
DOI: 10.1134/S0001437022040063

• Investigations of Lateral Sedimentation and Water Mass Properties in the
Tropical Atlantic during Cruise 60 of the R/V Akademik Ioffe

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Abstract: Herein we provide information on the integrated geological, geophysical, sedimentological, and hydrophysical investigations and passing meteorological and biological observations, as well as on the surface hydrobiological sampling in the Tropical Atlantic during cruise 60 (leg 2) of the R/V Akademik Ioffe in December 2021 to February 2022. The preliminary scientific results are discussed.
PubDate: 2022-08-01
DOI: 10.1134/S000143702204004X

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