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    Wyświetlanie 1-11 z 11
    Tytuł:
    Extreme sea levels at selected stations on the Baltic Sea coast
    Autorzy:
    Wolski, T.
    Wisniewski, B.
    Giza, A.
    Kowalewska-Kalkowska, H.
    Boman, H.
    Grabbi-Kaiv, S.
    Hammarklint, T.
    Holfort, J.
    Lydeikaite, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/47831.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Baltic Sea
    Baltic coast
    sea level
    storm surge
    fall
    sea surface
    surface deformation
    wind speed
    wind stress
    Źródło:
    Oceanologia; 2014, 56, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effects of cyanobacterial blooms on MODIS-L2 data products in the Southern Caspian Sea
    Autorzy:
    Naghdi, K.
    Moradi, M.
    Kabiri, K.
    Rahimzadegan, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/958164.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Cyanoprokaryota
    algal bloom
    chlorophyll a
    fluorescence
    wind stress
    sea surface
    satellite image
    Caspian Sea
    Źródło:
    Oceanologia; 2018, 60, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of drag coefficient formula choice on wind stress climatology in the North Atlantic and the European Arctic
    Autorzy:
    Wrobel-Niedzwiecka, I.
    Drozdowska, V.
    Piskozub, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/48480.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    drag coefficient
    parametrization
    boundary condition system
    wind stress
    climatology
    physical process
    biogeochemical process
    European Arctic
    North Atlantic
    wind field
    Źródło:
    Oceanologia; 2019, 61, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Upwelling dynamics in the Baltic Sea studied by a combined SAR-infrared satellite data and circulation model analysis
    Autorzy:
    Gurova, E.
    Lehmann, A.
    Ivanov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/48338.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Baltic Sea
    coastal upwelling
    MODIS satellite image
    circulation model
    synthetic aperture radar
    sea surface temperature
    wind stress
    Źródło:
    Oceanologia; 2013, 55, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Water column conditions in a coastal lagoon near Jeddah, Red Sea
    Autorzy:
    Albarakati, A.M.A.
    Ahmad, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/48751.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    water column
    coastal lagoon
    Red Sea
    heat balance
    air-sea interface
    stratification
    wind stress
    heat flux
    bottom topography
    Źródło:
    Oceanologia; 2012, 54, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation of nutrient transport from different depths during an upwelling event in the Gulf of Finland
    Autorzy:
    Vali, G.
    Zhurbas, V.
    Laanemets, J.
    Elken, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/48984.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Baltic Sea
    ecohydrodynamic model
    Finland Gulf
    nutrient transport
    phosphorus
    phytoplankton biomass
    princeton ocean model
    remote sensing
    simulation
    upwelling
    water transport
    wind
    wind stress
    Opis:
    Numerical simulation experiments with a high-resolution circulation model were carried out to study nutrient transport from different depths to the surface 10-m layer during an upwelling event along the northern coast of the Gulf of Finland in July 1999. The initial nutrient distribution is based on field measurements performed in the north-western part of the Gulf. Wind forcing covering the period of the upwelling along the northern coast was turned through 180◦ to simulate an upwelling along the southern coast. The simulation results showed that the main phosphorus transport to the upper 10-m layer occurred from depths shallower than 30 m for the upwelling events along both the northern and the southern coasts. Nitrogen transport to the upper 10-m layer was the largest from depths of 40–55 m for the upwelling along the northern and 40–65 m for the upwelling along the southern coast. Simulated cumulative volume transports to the upper 10-m layer from different depths showed that the contribution from deeper layers was larger in the case of the upwelling along the southern coast. The reduction of wind stress had a bigger influence on water transport from the deeper layers.
    Źródło:
    Oceanologia; 2011, 53, (1-TI)
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical aspects of extreme storm surges and falls on the Polish coast
    Autorzy:
    Wisniewski, B.
    Wolski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/49192.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    atmospheric precipitation
    atmospheric pressure
    deformation
    evaporation
    fall
    meteorological factor
    Polish coast
    sea level
    sea surface
    storm surge
    water density
    water exchange
    wind stress
    wind velocity
    Opis:
    Extreme sea levels – storm-generated surges and falls – on the Polish coast are usually the effects of three components: the volume of water in the southern Baltic (the initial level preceding a given extreme situation), the action of tangential wind stresses in the area (wind directions: whether shore- or seaward; wind velocities; and wind action duration), and the sea surface deformation produced by deep, mesoscale baric lows moving rapidly over the southern and central Baltic that generate the so-called baric wave. Among these factors, the baric wave is particularly important for, i.e. the water cushion underneath the baric depression, moving along the actual atmospheric pressure system over the sea surface.
    Źródło:
    Oceanologia; 2011, 53, (1-TI)
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Meteorological influences on the surface hydrographic patterns of the North Aegean Sea
    Autorzy:
    Sylaios, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/48232.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    water mass
    Baltic Sea
    Aegean Sea
    sea water
    hydrographic data
    wind stress
    bottom topography
    meteorological influence
    hydrographic pattern
    Anthos Peninsula
    salinity
    Opis:
    Hydrographic data from the North Aegean Sea were used to examine the summer variability of surface water masses during the period 1998–2001. Attention was placed on the surface hydrographic features of the area, such as the Black Sea Water (BSW) plume expansion, the frontal characteristics of the BSW with the Levantine Intermediate Water (LIW) and the variability of submesoscale hydrographic features (such as the Samothraki Anticyclone). Strong southerly wind stresses were found responsible for relaxing the horizontal density gradients across the BSW-LIW frontal zone and displacing this front to the north of Lemnos Island, thus suppressing the Samothraki Anticyclone towards the Thracian Sea continental shelf. Under northerly winds, the BSW-LIWfront returns to its regular position (south of Lemnos Island), thus allowing the horizontal expansion of the Samothraki gyre up to the Athos Peninsula. Present results indicate the importance of medium-term wind stress effects on the generation of Samothraki Anticyclone suppression/expansion events.
    Źródło:
    Oceanologia; 2011, 53, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on time-varying reliability of wind power gearbox with failure correlation
    Autorzy:
    Zheng, Mingliang
    Powiązania:
    https://bibliotekanauki.pl/articles/2200876.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    wind power gearbox
    failure correlation
    stress-strength
    time-varying reliability
    Opis:
    In the process of reliability modeling and design of a wind power gearbox, the influence of failure correlation of system components and random dynamic loads can not be ignored. In this paper, taking the output power of each shaft of the gearbox as the starting point, distribution parameters of stress and strength for critical failed components (gear and bearing) of the gearbox are solved. After normalization of these parameters, and when there is a linear correlation between the loads of each component, finally, the time-varying reliability related to failure correlation is calculated based on a full probability differential method by using the stress strength interference theory at the system level, and the results are verified by the Monte-Carlo simulation method. It is found that the failure correlation caused by the external dynamic loads between components can significantly reduce reliability of the gearbox system. The stronger the correlation, the lower the reliability of the gearbox system. Meanwhile, the time-varying reliability conforms to characteristics of the “failure bathtub curve” of typical mechanical products. This paper can lay a foundation for the time-varying reliability optimization design and structural robustness design of the wind power gearbox.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2023, 61, 1; 119--127
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wave-induced bottom shear stress estimation in shallow water exemplified by using deep water wind statistics
    Autorzy:
    Myrhaug, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/47582.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    shallow water
    deep water
    wind
    water
    circulation model
    shear stress
    mud deposit
    coastal zone
    estuarine zone
    bottom sediment
    Opis:
    The paper provides a simple and analytical method which can be used to give estimates of the wave-induced bottom shear stress for very rough beds and mud beds in shallow water based on wind statistics in deep water. This is exemplified by using long-term wind statistics from the northern North Sea, and by providing examples representing realistic field conditions. Based on, for example, global wind statistics, the present results can be used to make estimates of the bottom shear stress in shallow water.
    Źródło:
    Oceanologia; 2017, 59, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sediment transport beyond the surf zone under waves and currents of the non-tidal sea: Lubiatowo (Poland) case study
    Autorzy:
    Ostrowski, R.
    Stella, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/241109.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
    Tematy:
    wave-induced nearbed oscillations
    sea currents
    wind-driven current
    sand grain diameter
    bed shear stress
    friction velocity
    sediment transport
    Opis:
    The paper deals with the sandy coastal zone at Lubiatowo in Poland (the south Baltic Sea). The study comprises experimental and theoretical investigations of hydrodynamic and lithodynamic processes in the coastal region located close to the seaward boundary of the surf zone and beyond the surf zone. The analysis is based on field data collected at the IBW PAN Coastal Research Station in Lubiatowo. The data consist of wind velocity reconstructed from the long-term wave climate, deep-water wave buoy records and sea bottom soil parameters. Nearbed flow velocities induced by waves and currents, as well as bed shear stresses are theoretically modelled for various conditions to determine sediment motion regimes in the considered area. The paper discusses the possibility of occasional intensive sediment transport and the occurrence of distinct sea bed changes at bigger water depths.
    Źródło:
    Archives of Hydro-Engineering and Environmental Mechanics; 2016, 63, 1; 63-77
    1231-3726
    Pojawia się w:
    Archives of Hydro-Engineering and Environmental Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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