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    Wyświetlanie 1-8 z 8
    Tytuł:
    A system for the determination of surface water pCO2 in a highly variable environment, exemplified in the Southern Baltic Sea
    Autorzy:
    Stokowski, M.
    Makuch, P.
    Rutkowski, K.
    Wichorowski, M.
    Kulinski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078920.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    surface water
    carbon dioxide
    coastal zone
    environment change
    inorganic carbon
    open water
    Baltic Sea
    Opis:
    Measurement of pCO2 in highly dynamic coastal zones such as the southern Baltic Sea presents many challenges. In this study, we designed a system to measure pCO2 and then validated it in a series of laboratory and seagoing tests. The fast response time of the system was shown to provide a better resolution of CO2 system gradients. In the open waters of the Baltic Sea, the accuracy of the pCO2 measurements (±1.3 μatm) met the requirements of the ICOS (±2.0 μatm). In the coastal zone, there was less consistency between pCO2, DIC and pH measurements, suggesting the need to redefine the quality assurance and control requirements for the measurement of pCO2 in dynamic regions.
    Źródło:
    Oceanologia; 2021, 63, 2; 276-282
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of the burial rate estimation methods of organic and inorganic carbon and quantification of carbon burial in two high Arctic fjords
    Autorzy:
    Koziorowska, K.
    Kulinski, K.
    Pempkowiak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/47711.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    organic carbon
    inorganic carbon
    marine sediment
    pore water
    Arctic fjord
    surface sediment
    primary production
    absorption spectrum
    Źródło:
    Oceanologia; 2018, 60, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Could submarine groundwater discharge be a significant carbon source to the Southern Baltic Sea?
    Autorzy:
    Szymczycha, B.
    Maciejewska, A.
    Winogradow, A.
    Pempkowiak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/49181.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Puck Bay
    seepage water
    dissolved organic carbon
    inorganic carbon
    carbon budget
    Baltic Sea
    World Ocean
    ground water
    marine environment
    Źródło:
    Oceanologia; 2014, 56, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diffusive component of the vertical flux of particulate organic carbon in the North polar Atlantic
    Autorzy:
    Stramska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/48240.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    organic matter
    ocean colour
    nutrient
    inorganic carbon
    remote sensing
    particulate organic carbon
    Atlantic Ocean
    vertical flux
    phytoplankton
    solar energy
    photosynthesis
    Opis:
    The diffusive component of the vertical flux of particulate organic carbon (POC) from the surface ocean layer has been estimated using a combination of the mixed layer model and ocean color data from the SeaWiFS satellite. The calculations were carried out for an example location in the north polar Atlantic centered at 75◦N and 0◦ E for the time period of 1998–2004. The satellite estimates of surface POC derived using a regional ocean color algorithm were applied as an input to the model driven by local surface heat and momentum fluxes. For each year of the examined period, the diffusive POC flux was estimated at 200-m depth from April through December. The highest flux is generally observed in the late fall as a result of increased heat loss and convectional mixing of surface waters. A relatively high diffusive POC flux is also observed in early spring, when surface waters are weakly stratified. In addition, the model results demonstrate significant interannual variability. The highest diffusive POC flux occurred in 1999 (about 4500 mg m−2 over the 9-month period). In 1998 and 2002 the estimated flux was about two orders of magnitude lower. The interannual variability of the diffusive POC flux is associated with mixed layer dynamics and underscores the importance of atmospheric forcing for POC export from the surface layer to the ocean’s interior.
    Źródło:
    Oceanologia; 2006, 48, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Benthic diffusive fluxes of organic and inorganic carbon, ammonium and phosphates from deep water sediments of the Baltic Sea
    Autorzy:
    Lengier, M.
    Szymczycha, B.
    Brodecka-Goluch, A.
    Klostowska, Z.
    Kulinski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078878.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    biogeochemistry
    benthic flux
    organic carbon
    organic matter
    remineralization
    dissolved organic carbon
    dissolved inorganic carbon
    ammonium
    phosphate
    oxygen availability
    deep water sediment
    Baltic Sea
    Opis:
    In this study, Baltic Sea sediments, as a source of dissolved inorganic carbon (DIC), dissolved organic carbon (DOC), ammonium (NH4 +), and phosphates (PO4 3−), were investigated based on samples obtained in 2017 and 2018, shortly after a sequence of inflows from the North Sea that occurred between 2014 and 2017. Two different data sets (I and II) were used to assess benthic diffusive fluxes and thus elucidate both the temporal conditions at the time of sampling (data set I) and the diffusion potential of the sediments (data set II). The estimated fluxes were characterized by a high spatial variability within the whole Baltic Sea and ranged between −0.01 and 3.33 mmol m−2 d−1 for DIC, −0.02 and 0.44 mmol m−2 d−1 for DOC, −40.5 and 1370.1 μmol m−2 d−1 for NH4 +, and −5.9 and 60.9 μmol m−2 d−1 for PO4 3−. The estimated benthic diffusive fluxes indicated a high potential for DIC, DOC, NH4 +, and PO4 3− release from Baltic Sea sediments. The high O2 concentrations in the water column of the Gulf of Bothnia together with major Baltic inflows (MBIs) bringing oxygenated seawater to the Baltic Proper and to some extent the Eastern Gotland Basin regulate the amounts of chemicals released from the sediment. Our study showed that a sequence of inflows has greater impact on the diminution of diffusive fluxes than does a single MBI and that the sediments of the Baltic Proper, even under the influence of inflows, are an important source of C, N, and P (159 kt yr−1 for DIC+DOC, 6.3
    Źródło:
    Oceanologia; 2021, 63, 3; 370-384
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatiotemporal variation of alkaline phosphatase activity in coastal waters off Trivandrum
    Autorzy:
    Shivaramu, M.S.
    Randive, A.K.
    Kumari, R.
    Gauns, M.
    Ponnapakkam, L.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/48698.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    phosphatase
    alkaline phosphatase
    chlorophyll a
    phytoplankton
    bacteria
    inorganic nutrient
    organic carbon
    aquatic environment
    spatial variation
    temporal variation
    Źródło:
    Oceanologia; 2019, 61, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    PO4 release at the sediment surface under anoxic conditions: a contribution to the eutrophication of the Baltic Sea?
    Autorzy:
    Schneider, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/49162.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    anoxia
    biogeochemical condition
    carbon dioxide
    deep water
    dissolved inorganic nitrogen
    eutrophication
    hydrogen sulphide
    mineralization
    nutrient concentration
    oxygen
    phosphate
    sediment
    Opis:
    The vertical profiles of phosphate, total CO2 and oxygen/hydrogen sulphide were determined in the deep water of the Gotland Sea during March 2003 to July 2006 with a temporal resolution of 2–3 months. This time span included the shift from anoxic to oxic conditions resulting from a water renewal event, as well as the transition back to anoxic waters during the subsequent two-year stagnation period. The data from depths below 150 m were used to identify and quantify phosphate release and removal processes. The relationship between the total CO2 generated by mineralization (CT1 min) and the PO4 concentrations indicated that the initial decrease in the phosphate concentrations after the inflow of oxygen-rich water was mainly a dilution effect. Only about one third of the PO4 removal was a consequence of the precipitation of insoluble iron-3-hydroxo-phosphates (Fe-P), which occurred slowly at the sediment surface under oxic conditions. From the CT1 min/PO4 ratios it was also concluded that the formation of Fe-P was reversed during the later phase of the stagnation, when the redoxcline approached a depth of 150 m. A phosphate mass balance was performed for four deep water sub-layers in order to quantify the dissolution of Fe-P during the stagnation period and thus to estimate the amount of Fe-P deposited during the last inflow of oxygen-rich water. A value of about 50 mmol-P m−2 was found, which refers to the specific biogeochemical conditions during the change from anoxic to oxic conditions that preceded the stagnation period.
    Źródło:
    Oceanologia; 2011, 53, (1-TI)
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variability of the marine boundary layer parameters over Baltic Sea sub-basins and their impact on nitrogen deposition
    Autorzy:
    Hongisto, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/48086.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Baltic Sea
    biological production
    brackish water
    carbon cycle
    inorganic nitrogen
    marine area
    marine boundary layer
    meteorological measurement
    nitrogen deposition
    reactive nitrogen species
    seasonal deposition
    terrestrial area
    variability
    Opis:
    The variability of the marine boundary layer parameters over the Baltic Sea and its sub-basins and their impact on the 6 h, monthly or seasonal deposition of oxidized nitrogen compounds was studied using results of the Hilatar chemistrytransport model, the 6th hour forecasts of the HIRLAM weather prediction model and meteorological measurement data. The monthly load of oxidized nitrogen was highest in the winters of 1993–1995 and 2000, and lowest in 1996–1997 and 2005; no trend was detected. Short-time correlations were low, but a significant correlation of the monthly deposition with the NAO index and ice-season was found over northern sub-basins.
    Źródło:
    Oceanologia; 2011, 53, (1-TI)
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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