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    Wyświetlanie 1-5 z 5
    Tytuł:
    Vertical distribution of zooplankton in the epipelagic zone off Sharm El-Sheikh, Red Sea, Egypt
    Autorzy:
    Dorgham, M.M.
    Elsherbiny, M.M.
    Hanafi, M.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/48203.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    hydrography
    copepod
    Red Sea
    Sharm El-Sheikh
    Egypt
    plankton
    zooplankton dynamics
    vertical distribution
    epipelagic zone
    Chaetognatha
    Appendicularia
    Opis:
    The purpose of the present study was to track the seasonal vertical distribution of zooplankton abundance in the epipelagic zone off Sharm El-Sheikh, Red Sea. Zooplankton samples were collected seasonally within the depth ranges of 0–25, 25–50, 50–75, 75–100 m at a single station off Sharm El-Sheikh City. The present study is an attempt to expand knowledge about the structure as well as the vertical distribution of the epipelagic zooplankton community in the Gulf of Aqaba in general and in its southern part in particular. The results indicate the occurrence of 52 copepod species and several species of other planktonic groups in the study area; the zooplankton standing crop fluctuated between 1124 and 4952 organisms m−3. Copepods appeared to be the predominant component, forming an average of 86.5% of the total zooplankton count, and with other groups demonstrated a markedly different seasonal vertical distribution. Twelve bathypelagic copepod species were reported during the present study, and five species were new to the area, having migrated northwards from the main basin of the Red Sea.
    Źródło:
    Oceanologia; 2012, 54, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical oceanographic conditions and a sensitivity study on meltwater runoff in a West Greenland fjord: Kangerlussuaq
    Autorzy:
    Monteban, D.
    Pedersen, J.O.P.
    Nielsen, M.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079080.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    melt water
    hydrodynamic model
    numerical model
    seasonal variability
    physical condition
    water mass
    Arctic fjord
    West Greenland
    Kangerlussuaq
    Opis:
    In this paper, we discuss the first setup of a hydrodynamic model for the fjord-type estuary Kangerlussuaq, located in West Greenland. Having such a high-fidelity numerical model is important because it allows us to fill in the temporal and spatial gaps left by in situ data and it allows us to examine the response of the fjord to changes in ice sheet runoff. The numerical model is calibrated against in situ data, and a one-year simulation was performed to study the seasonal variability in the physical oceanographic environment and the fjord's response to changing meltwater runoff. The fjord consists of two distinct parts: a deep inner part that is 80 km long with weak currents and a shallow part that covers the outer 100 km of the fjord connected to the ocean. The outer part has very fast currents (∼1.3 m/s), which we suggest prevents winter sea ice formation. The dominant currents in the fjord are oriented parallel to the long axis of the fjord and are driven by tides and (during summer) freshwater inflow from meltwater-fed rivers. Furthermore, mixing processes are characterized by strong tidal mixing and bathymetric restrictions, and the deep-lying water mass is subject to renewal primarily in wintertime and is almost dynamically decoupled from the open ocean during summertime. Finally, a sensitivity study on the changing meltwater runoff was performed, showing that increasing freshwater runoff considerably strengthens stratification in the upper 100 m of the water column in the inner part of the fjord.
    Źródło:
    Oceanologia; 2020, 62, 4PA; 460-477
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Annual phytoplankton dynamics in the Gulf Saint Vincent, South Australia, in 2011
    Autorzy:
    Leterme, S.C.
    Jendyk, J.-G.
    Ellis, A.V.
    Brown, M.H.
    Kildea, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/48952.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    phytoplankton community
    dinoflagellate
    diatom
    salinity
    nutrient
    turbulence
    environment condition
    Saint Vincent Gulf
    South Australia
    annual cycle
    Źródło:
    Oceanologia; 2014, 56, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial distribution and diet of larval snailfishes (Liparis fabricii, Liparis gibbus, Liparis tunicatus) in the Canadian Beaufort Sea
    Autorzy:
    Walkusz, W.
    Paulic, J.E.
    Wong, S.
    Kwasniewski, S.
    Papst, M.H.
    Reist, J.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/48883.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Beaufort Sea
    snailfish
    Liparis fabricii
    Liparis gibbus
    Liparis tunicatus
    diet
    spatial distribution
    Źródło:
    Oceanologia; 2016, 58, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transport and hydraulically-induced recycling of phosphorus in the North Sea-Baltic Sea transition zone
    Autorzy:
    Kepp, R.R.
    Struve, A.
    Christiansen, C.
    Lund-Hansen, L.C.
    Nielsen, M.H.
    Vang, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/47459.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Little Belt
    transport
    transition zone
    Baltic Sea
    recycling
    phosphorus
    water transport
    hydraulic mixing
    North Sea
    water chemistry
    water column
    Opis:
    Bottom-mounted acoustic Doppler current profiler measurements indicate that the net transport of water (844 m3 s−1) in the Little Belt makes up only 6% of the total transport between the Baltic Sea and the North Sea. This is a smaller percentage than the 9% commonly found in the literature. Owing to barotropic and tidal currents the gross transport is 5 times larger. The net transport is directed towards the North Sea mainly in the top 32 m of the water column but towards the Baltic Sea it occurs in the lower 5 m of the water column. The resulting transport of phosphorus is strongly affected by vertical mixing in an area of hydraulic control in the narrow part of the Little Belt. Comparisons of phosphorus profiles in stratified waters and in the mixing area indicate a yearly entrainment of 15 tonnes P from the bottom water to the surface layer. This vertical transport of P forms part of an internal loop in the general transport between the Baltic Sea and the North Sea. Compared to the transport observed 15–16 years ago, the present net phosphorus transport of 163 tonnes yr−1 from the Baltic Sea through the Little Belt is substantially lower.
    Źródło:
    Oceanologia; 2006, 48, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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