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Wyszukujesz frazę "sea wave modelling" wg kryterium: Temat

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    Wyświetlanie 1-11 z 11
    Tytuł:
    Assessment of wave climate and energy resources in the Baltic Sea nearshore (Lithuanian territorial water)
    Autorzy:
    Jakimavicius, D.
    Kriauciuniene, J.
    Sarauskiene, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/47503.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    wave climate
    energy resource
    sea wave modelling
    wave parameter
    Baltic Sea
    Lithuania
    Źródło:
    Oceanologia; 2018, 60, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    WAVEWATCH-III source terms evaluation for optimizing hurricane wave modeling: A case study of Hurricane Ivan
    Autorzy:
    Kalourazi, M.Y.
    Siadatmousavi, S.M.
    Yeganeh-Bakhtiary, A.
    Jose, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078933.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    sea wave modelling
    Hurricane Ivan
    wind speed
    wave parameter
    whitecap dissipation
    Mexico Gulf
    Opis:
    Simulating hurricane-generated waves is a challenging task due to rapidly fluctuating wind speed and direction, simultaneous presence of swells propagating out of the previous location of the hurricane and following/opposing waves on either side of the hurricane track, and dissipation in wind speed radially from the center of the hurricane. Bulk wave parameters have been investigated using the source term packages ST3, ST4 and ST6 implemented in the WAVEWATCH-III model to determine the most appropriate formulation for simulating hurricanegenerated waves in the Gulf of Mexico. Based on the comparisons between model results and in situ observations during the passage of Hurricane Ivan (2004), it is shown that ST3 is not as successful as other formulations for hurricane wave modeling. Calibrated ST6 variant, T12, has shown to be the best formulation for simulating bulk wave parameters at points within the range of hurricane wind forcing; however, for the area beyond, and also during fair weather conditions, calibrated ST4 formulation, T471-Ex4, is recommended. Although T471-EX4 and T12 packages outperformed other cases, they overestimated waves propagating in the oblique and opposing wind. Dependence of ST6 parameter a0 on wind and wave direction is examined to improve the model performance.
    Źródło:
    Oceanologia; 2021, 63, 2; 194-213
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial patterns of the wave climate in the Baltic Proper and the Gulf of Finland
    Autorzy:
    Soomere, T.
    Raamet, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/47721.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Baltic Sea
    Finland Gulf
    instrumental measurement
    long-term change
    sea wave modelling
    spatial pattern
    temporal variation
    visual observation
    wave climate
    wave measurement
    wind speed
    wind wave
    Opis:
    We make an attempt to consolidate results from a number of recent studies into spatial patterns of temporal variations in Baltic Sea wave properties. The analysis is based on historically measured and visually observed wave data, which are compared with the results of numerical hindcasts using both simple fetch-based one-point models and contemporary spectral wave models forced with different wind data sets. The focus is on the eastern regions of the Baltic Sea and the Gulf of Finland for which long-term wave data sets are available. We demonstrate that a large part of the mismatches between long-term changes to wave properties at selected sites can be explained by the rich spatial patterns in changes to the Baltic Sea wave fields that are not resolved by the existing wave observation network. The spatial scales of such patterns in the open sea vary from >500 km for short-term interannual variations down to about 100 km for long-term changes.
    Źródło:
    Oceanologia; 2011, 53, (1-TI)
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parameters of wind seas and swell in the Black Sea based on numerical modeling
    Autorzy:
    Divinsky, B.
    Kosyan, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/48740.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    wind
    swelling
    surface wave
    wave
    Baltic Sea
    Azov Sea
    numerical modelling
    spatial distribution
    Źródło:
    Oceanologia; 2018, 60, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Extreme wind waves in the Black Sea
    Autorzy:
    Divinsky, B.V.
    Fomin, V.V.
    Kosyan, R.D.
    Ratner, Y.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/47781.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    wind wave
    swelling
    surface wave
    spatial distribution
    storm
    wave climate
    numerical modelling
    Black Sea
    Źródło:
    Oceanologia; 2020, 62, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the climatic variations in the wind waves parameters on the alongshore sediment transport
    Autorzy:
    Divinsky, B.V.
    Kosyan, R.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079275.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    climate variability
    wind wave
    coastal zone
    sediment transport
    numerical modelling
    Black Sea
    Opis:
    The purpose of this work was to analyze the influence of climatic variability of wind waves and swell parameters in the coastal zone on the sediment transport and to assess the contribution of the swell to the formation of alongshore fluxes. The object of research is the Anapa bay-bar (the Black Sea). Mathematical modeling has shown that in the Anapa bay-bar area the average annual wind waves and swell powers have significant interannual variability. For the period from 1979 to 2017, in the southern part of the bay-bar, there was a statistically significant decrease in the share of swell in the alongshore transport, directed from NW to SE, in the central part – an increase in the contribution of swell to the total sediment flow from SE to NW, in the northern part – probable increase in flows to NW and decrease – to SE. Such a dynamic is consistent, in general, with experimental observations of the processes of erosion and accumulation of beach-forming material along the Anapa bay-bar coastline. A separate description of the bottom sediment fluxes under the influence of wind waves and swell made it possible to explain the fluctuations of the coastline over a climatic period.
    Źródło:
    Oceanologia; 2020, 62, 2; 190-199
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Currents and waves in the Northern Gulf of Riga: measurement and long-term hindcast
    Autorzy:
    Suursaar, U.
    Kullas, T.
    Aps, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/47862.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    hydrodynamic modelling
    water exchange
    wave
    Riga Gulf
    Baltic Sea
    long-term hindcast
    wave measurement
    wind force
    wind condition
    atmospheric circulation
    Opis:
    Based on measurements of waves and currents obtained for a period of 302 days with a bottom-mounted RDCP (Recording Doppler Current Profiler) at two differently exposed locations, a model for significant wave height was calibrated separately for those locations; in addition, the Gulf of Riga-Vainameri 2D model was validated, and the hydrodynamic conditions were studied. Using wind forcing data from the Kihnu meteorological station, a set of current, water exchange and wave hindcasts were obtained for the period 1966–2011. Current patterns in the Gulf and in the straits were wind-dependent with characteristic wind switch directions. The Matsi coast was prone to upwelling in persistent northerly wind conditions. During the hindcast period, currents increased along the Koiguste coast and in the Suur Strait, waves decreased noticeably off Koiguste but fluctuated without a clear linear trend near Matsi. The spatially contrasting results for differently exposed coasts were related to the corresponding variations in local wind conditions and to changes in atmospheric circulation patterns over northern Europe.
    Źródło:
    Oceanologia; 2012, 54, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Formation and species composition of stormcast beach wrack in the Gulf of Riga, Baltic Sea
    Autorzy:
    Suursaar, U.
    Torn, K.
    Martin, G.
    Herkul, K.
    Kullas, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/48538.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    beach wrack
    species composition
    wave
    current
    storm
    hydrodynamic modelling
    submerged vegetation
    biodiversity
    Riga Gulf
    Baltic Sea
    Źródło:
    Oceanologia; 2014, 56, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Flow, waves and water exchange in the Suur Strait, Gulf of Riga, in 2008
    Autorzy:
    Raudsepp, U.
    Laanemets, J.
    Haran, G.
    Alari, V.
    Pavelson, J.
    Kouts, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/49038.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    flow
    wave
    water exchange
    Suur Strait
    Riga Gulf
    modelling
    shear velocity
    Baltic Sea
    wind
    wind condition
    storm
    wave heigh
    sediment
    seasonal cycle
    horizontal distribution
    outflow
    Opis:
    Wind, flow and wave measurements were performed in November–December in 2008 in the relatively narrow and shallow Suur Strait connecting the waters of the V¨ainameri and the Gulf of Riga. During the measurement period wind conditions were extremely variable, including a severe storm on 23 November. The flow speed along the strait varied between ±0.2 m s−1, except for the 0.4 m s−1 that occurred after the storm as a result of the sea level gradient. The mean and maximum significant wave heights were 0.53 m and 1.6 m respectively. Because of their longer fetch, southerly winds generated higher waves in the strait than winds from the north. All wave events caused by the stronger southerly winds induced sediment resuspension, whereas the current-induced shear velocity slightly exceeded the critical value for resuspension only when the current speed was 0.4 m s−1. A triplenested two-dimensional high resolution (100 m in the Suur Strait) circulation model and the SWAN wave model were used to simulate water exchange in 2008 and the wave-induced shear velocity field in the Suur Strait respectively. Circulation model simulations demonstrated that water exchange was highly variable, that cumulative transport followed an evident seasonal cycle, and that there was an gross annual outflow of 23 km3 from the Gulf of Riga. The horizontal distribution of waveinduced shear velocity during the strong southerly wind event indicated large shear velocities and substantial horizontal variability. The shear velocities were less than the critical value for resuspension in the deep area of the Suur Strait.
    Źródło:
    Oceanologia; 2011, 53, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A quasi phase-resolving model of net sand transport and short-term cross-shore profile evolution
    Autorzy:
    Ostrowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/48565.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    coastal zone
    hydrodynamics
    wave-current condition
    cross-shore profile
    Baltic Sea
    evolution
    modelling
    sand transport
    sediment transport
    hydrodynamic impact
    Opis:
    A way of modelling of the net sediment transport rate on a cross-shore profile and the resulting sea bed changes is presented. In the sediment transport computations, a three-layer model with a description of the bedload based on the water-soil mixture theory by Kaczmarek& Ostrowski (1998, 2002) is used. The modelling system is applied to wave-current conditions variable over the cross-shore profile, and determined using the computational frameworkof Szmytkiewicz (2002a, b). The sediment transport module incorporates the asymmetric wave approaches as proposed by Ostrowski (2002). Model simulations have been produced for uniformly sloped and multi-bar initial cross-shore profiles. Some of the model results are compared with the IBW PAN (Institute of Hydroengineering of the Polish Academy of Sciences) field data collected at the Coastal Research Station in Lubiatowo.
    Źródło:
    Oceanologia; 2003, 45, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of the sandy coast: Hydrodynamic and morphodynamic conditions (on the example of the Eastern Gulf of Finland)
    Autorzy:
    Divinsky, B.V.
    Ryabchuk, D.V.
    Kosyan, R.D.
    Sergeev, A.Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078924.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    sandy coast
    coastal zone
    climate change
    hydrodynamic condition
    morphodynamic condition
    sea level
    surface wave
    sediment transport
    numerical modelling
    Finland Gulf
    Opis:
    Forecasting the coastal zone development under possible climatic changes and technogenic impact is an extremely important task. This forecasting is based on our understanding of the mechanism of the hydrodynamic processes impact on the coastal zone. The goal of this work is to describe the hydrodynamic conditions (currents, sea level, surface waves) of coastal waters and to assess the influence of hydrodynamic parameters on the general dynamics of the beach. The object of this study is a part of the southern coastal zone of the Gulf of Finland (Baltic Sea). The method of research is a full-scale experiment and mathematical modeling. The initial data for the analysis are climatic characteristics of the hydrodynamic regime of the sea (velocity and direction of currents, sea level, integral parameters of wind seas and swell), as well as interannual variations in the position of the coastline in the region of the Izhora village in the eastern part of the Gulf of Finland. Interannual variations in hydrodynamic parameters and volumes of bottom material transported under the influence of wind seas and swell were estimated. Main conclusion: swell waves determine the general background in the patterns of the bottom material transport, and the contribution of wind seas is in the formation of beach properties, namely, the accumulation or decrease of beach material
    Źródło:
    Oceanologia; 2021, 63, 2; 214-226
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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