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    Wyświetlanie 1-6 z 6
    Tytuł:
    Some probabilistic properties of surf parameter
    Autorzy:
    Myrhaug, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079192.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    probabilistic property
    surf parameter
    wave statistics
    continental shelf
    coastal zone
    Norway
    Opis:
    This article is supplementary to Myrhaug (2018) and presents some probabilistic properties of the surf parameter for individual waves and the spectral surf parameter for sea states by using distributions based on data from the Norwegian continental shelf. The average statistical features given by the mean value and the standard deviation of the two surf parameters are considered. Examples of results for the surf parameter are provided for a Phillips spectrum and a family of JONSWAP spectra for wind sea, and for sea states using a joint frequency table of significant wave height and mean zero-crossing wave period for combined wind sea and swell. The spectral surf parameter results are obtained by using a joint distribution of significant wave height and spectral surf parameter, and the mean statistical properties are given for joint frequency tables of significant wave height and mean zero-crossing wave period from three deep water locations on the Norwegian continental shelf. It is also demonstrated how the results can be applied to calculate the vertical wave runup elevation for breaking waves.
    Źródło:
    Oceanologia; 2020, 62, 3; 395-401
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Restructuring of a zooplankton community by perturbation from a wind-forced coastal jet
    Autorzy:
    Pedersen, O.-P.
    Tande, K.S.
    Li, C.
    Zhou, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/47789.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    zooplankton
    filament
    intrusion
    restructuring
    mesoscale
    perturbation
    coastal region
    Norway
    transient wind
    saline water
    equivalent spherical diameter
    Opis:
    The impact of transient wind events on an established zooplankton community was observed during a field survey in a coastal region off northern Norway in May 2002. A transient wind event induced a coastal jet/filament intrusion of warm, saline water into our survey area where a semi-permanent eddy was present. There was an abrupt change in zooplankton community structure within 4–7 days of the wind event, with a change in the size structure, an increase in lower size classes less than 1 mm in equivalent spherical diameter (ESD) and a decrease in larger size classes greater than 1.5 mm in ESD. The slope of zooplankton biovolume spectra changed from −0.6 to −0.8, consistent with the size shifting towards smaller size classes. This study shows that even well established zooplankton communities are susceptible to restructuring during transient wind events, and in particular when wind forcing induces horizontal currents or filaments.
    Źródło:
    Oceanologia; 2010, 52, 3; 473-497
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Climate-related trends and meteorological conditions in the Porsanger fjord, Norway
    Autorzy:
    Cieszynska, A.
    Stramska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/48950.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    meteorological condition
    wind speed
    air temperature
    precipitation
    climate change
    seasonal variability
    Arctic environment
    Porsanger fjord
    Norway
    Źródło:
    Oceanologia; 2018, 60, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Total suspended particulate matter in the Porsanger fjord (Norway) in the summers of 2014 and 2015
    Autorzy:
    Bialogrodzka, J.
    Stramska, M.
    Ficek, D.
    Wereszka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/48580.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    suspended particulate matter
    Porsanger fjord
    Norway
    Barents Sea
    global change
    coastal water
    water temperature
    salinity
    inherent optical property
    Opis:
    High-latitude fjords, very vulnerable to global change, are impacted by their land and ocean boundaries, and they may be influenced by terrestrial water discharges and oceanic water inputs into them. This may be reflected by temporal and spatial patterns in concentrations of biogeochemically important constituents. This paper analyses information relating to the total suspended matter (TSM) concentration in the Porsanger fjord (Porsangerfjorden), which is situated in the coastal waters of the Barents Sea. Water samples and a set of physical data (water temperature, salinity, inherent optical properties) were obtained during two field expeditions in the spring and summer of 2014 and 2015. Bio-optical relationships were derived from these measurements, enabling optical data to be interpreted in terms of TSM concentrations. The results revealed significant temporal variability of TSM concentration, which was strongly influenced by precipitation, terrestrial water discharge and tidal phase. Spatial distribution of TSM concentration was related to the bathymetry of the fjord, dividing this basin into three subregions. TSM concentrations ranged from 0.72 to 0.132 g m−3 at the surface (0–2 m) and from 0.5 to 0.67 g m−3 at 40 m depth. The average mineral fraction was estimated to be 44% at surface and 53% at 40 m.
    Źródło:
    Oceanologia; 2018, 60, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acoustical estimation of fish distribution and abundance in two Spitsbergen fjords
    Autorzy:
    Szczucka, J.
    Hoppe, L.
    Schmidt, B.
    Fey, D.P.
    Powiązania:
    https://bibliotekanauki.pl/articles/47822.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Arctic region
    fish
    cod
    Gadus morhua
    Norway haddock
    Melanogrammus aeglefinus
    fish distribution
    fish abundance
    acoustics
    climate change
    global warming
    Spitsbergen fjord
    Opis:
    Over recent decades, the Arctic region has been subjected to rapid climate change stemming from global warming. The advance of Atlantic waters to high latitudes is notable. The increased abundance of fish, such as cod (Gadus morhua) and haddock (Melanogrammus aeglefinus), has been reported near the western coast of Spitsbergen and entering fjords together with Atlantic waters. This study used multifrequency acoustics to measure fish distribution and abundance in 2013–2014 in two Arctic fjords, the colder Hornsund, which is typically of Arctic character, and the warmer Kongsfjorden, which is more of Atlantic character. The study revealed a bimodal fish size distribution with larger fish in the deep parts of fjords, and smaller fish distributed in more shallow waters. An evident increase in the abundance of large fish, most probably Atlantic cod, was observed in Hornsund and especially in Kongsfjorden in 2014 in comparison to 2013. The intense inflow of Atlantic water on the shelf in 2014 is suggested as the explanation for this phenomenon.
    Źródło:
    Oceanologia; 2017, 59, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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