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Wyświetlanie 1-15 z 135
Tytuł:
Temperature and salinity of surface water at a coastal measuring point, Isbjörnhamna, Spitsbergen
Autorzy:
Swerpel, Sławomir
Powiązania:
https://bibliotekanauki.pl/articles/2053282.pdf
Data publikacji:
1987
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Spitsbergen
sea water
temperature and salinity
Źródło:
Polish Polar Research; 1987, 8, 1; 57-64
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Annual course of superficial water temperature in the Ezcurra Inlet, King George Island, Antarctica
Autorzy:
Gurgul, Henryk
Stochmal, Wiesław
Szymczak, Wiesław
Powiązania:
https://bibliotekanauki.pl/articles/2052577.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctica
South Shetland Islands
sea water temperature
Źródło:
Polish Polar Research; 1996, 17, 1-2; 43-59
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Factors regulating bacterial abundance in Antarctic coastal and shelf waters
Autorzy:
Zdanowski, Marek K.
Powiązania:
https://bibliotekanauki.pl/articles/2052461.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heterotrophic bacteria
protozooplankton
phytoplankton
krill
organic matter
temperature
sea water
freshwater
Źródło:
Polish Polar Research; 1998, 19, 3-4; 169-180
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new predatory cladoceran Cercopagis (Cercopagis) pengoi (Ostroumov 1891) in the Gulf of Gdańsk
Autorzy:
Bielecka, L.
Zmijewska, M.I.
Szymborska, A.
Powiązania:
https://bibliotekanauki.pl/articles/48376.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Cercopagidae
water temperature
crustacean
plankton
Caspian Sea
Baltic Sea
zooplankton
water body
Finland Gulf
new species
Riga Gulf
Gdansk Gulf
Podonidae
Cercopagis pengoi
Opis:
Cercopagis pengoi, a species native to the Ponto-Caspian area, was recorded for the first time in the Baltic Sea in the Gulf of Riga and in the open Gulf of Finland in 1992. Sampling in the shallow coastal area of the western part of the Gulf of Gdańsk at weekly intervals between April 1999 and April 2000 revealed the presence of C. pengoi in the zooplankton community. The species was recorded twice, at densities of 1369 indiv. m−3 on 30 July 1999 and 421 indiv. m−3 on 5 August 1999, when the water temperature was at its maximum, in excess of 21.7◦C and 23.9◦C respectively. C. pengoi had never been recorded in the Gulf of Gdańsk prior to 1999.
Źródło:
Oceanologia; 2000, 42, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustically measured diurnal vertical migration of fish and zooplankton in the Baltic Sea - seasonal variations
Autorzy:
Szczucka, J.
Powiązania:
https://bibliotekanauki.pl/articles/48748.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
zooplankton
fish
temperature
acoustic measurement
marine organism
physical structure
diurnal migration
vertical migration
seasonal variation
water
salinity
Baltic Sea
Opis:
Acoustic measurements were conducted at different seasons in the last five years at a fixed point of the Baltic Sea at a frequency 30 kHzcon currently with temperature and salinity sampling. Echosounding records were used to determine the seasonal and diurnal migration patterns of scattering layers in accordance with thermohaline conditions. Different seasonal patterns of nocturnal aggregations of organisms dependent on the temperature gradient in the thermocline were found. This paper illustrates the diurnal distributions of sound scattering layers and analyses the way they are linked to the physical structure of the water.
Źródło:
Oceanologia; 2000, 42, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heat and salt fluxes in the West Spitsbergen Current area in summer
Autorzy:
Piechura, J.
Osinski, R.
Petelski, T.
Wozniak, S.B.
Powiązania:
https://bibliotekanauki.pl/articles/49050.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Spitsbergen Current
temperature
radiation flux
energy flux
heat flux
sea surface
salt flux
ocean circulation
Opis:
Fluxes of radiation, sensible and latent heat, and fluxes of heat and salt within the upper layer of the ocean were calculated on the basis of measurements carried out in the area of the Norwegian-Atlantic and West Spitsbergen Currents during summer 2000. The sea surface radiation balance was calculated from direct measurements of downward and upward short-wave (solar) radiation, the net radiation fluxes and sea surface temperature. The daily doses of radiation energy reaching and leaving the sea surface were also estimated. To calculate the vertical heat fluxes in the atmospheric boundary layer the bulk parameterisation method was used. In most cases, the calculated heat fluxes were rather low, the average sensible heat flux was c. 10 Wm−2, and the latent heat flux about one order of magnitude higher; this is what could be expected in summer. Salt fluxes to the air in the process of aerosol production are very small and can be neglected. In summer the highest quantities of heat and salt are exchanged during mixing with surrounding waters. According to our measurements, Atlantic Water on its northward course from about 70◦N to 79◦ N loses about 100 TWof heat and 900 × 103 kg of salt. We thought it could be interesting to find out what happens to them. Some preliminary results of our investigation are presented here.
Źródło:
Oceanologia; 2002, 44, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pigment composition in relation to phytoplankton community structure and nutrient content in the Baltic Sea
Autorzy:
Ston, J.
Kosakowska, A.
Lotocka, M.
Lysiak-Pastuszak, E.
Powiązania:
https://bibliotekanauki.pl/articles/47672.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
biomass
pigment
nutrient
temperature
salinity
Baltic Sea
carotenoid
phytoplankton
chlorophyll
Opis:
The concentration of chlorophylls and carotenoids with respect to communities of characteristic phytoplankton species and hydrological parameters, such as temperature, salinity and nutrients were analysed. Samples from the southern Baltic were taken during three periods: spring 1999, autumn 1999 and 2000 during cruises of r/v ‘Oceania’ in this area. The seasonal differences between the phytoplankton species composition and pigmentation of samples (measured by HPLC) were noted. The total biomass of the spring phytoplankton population was 11–15 times greater than that of the autumn populations. However, the phytoplankton community was more diverse in the two autumns, whereas the spring population was almost mono-taxonomic: >80% of the total biomass consisted of dinophytes. The total content of chlorophylls (a, b, c1 + c2) was about 20 times higher in spring. Moreover, in spring the concentrations of photosynthetic carotenoids (with dominant perdinin) were 2–4 times higher than those of the photoprotecting carotenoids (with dominant diadinoxanthin), whereas in the two autumns the situation was reversed: PPC concentrations (with dominant zeaxanthin and diadinoxanthin) exceeded those of PSC (with dominant fucoxanthin) by c. 3–10 times. Pigment markers have proved to be extremely useful biomarkers for elucidating the composition of phytoplankton populations in natural samples.
Źródło:
Oceanologia; 2002, 44, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of coastal water hydrodynamics in the Southern Baltic - hindcast modelling of an upwelling event along the Polish coast
Autorzy:
Jankowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/49140.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
variability
temperature
coastal water
hydrodynamics
numerical modelling
Baltic Sea
surface layer
hydrological condition
coastal area
Opis:
This paper presents the results of an attempt to reproduce, with the aid of a numerical circulation model, the hydrological conditions observed in the coastal area of the southern Baltic in September 1989. A large fall in surface layer seawater temperature was recorded in September 1989 at two coastal stations in the vicinity of Kołobrzeg and Władysławowo. This upwelling-like phenomenon was assumed to be related to the specific anemobaric situation in September 1989, however typical of this phenomenon to occur along the Polish Baltic coast (Malicki & Miętus 1994). A three-dimensional (3-D) σ-coordinate baroclinic model of the Baltic Sea, with a horizontal resolution of ∼5 km and 24 sigma-levels in the vertical, was applied to investigate water circulation and thermohaline variability. Hindcast numerical simulation showed that the model provided a good reproduction of the temporal history of the surface seawater temperature and the duration of the upwelling-like fall, but that the model results were underestimated. The maxima of this large fall in the surface layer temperature at both coastal stations are closely related to the phase of change of the upwelling-favourable wind direction to the opposite one. The results of simulation runs showed details of upwelling development due to wind field fluctuations in time and differences in shaping the temperature and current patterns in conjunction with the variations in topography and coastline features in some areas along the Polish coast. Two different hydrodynamic regimes of water movements along the coast resulting from topographical features (the Słupsk Bank) can be distinguished. From the model simulation the specific conditions for the occurrence and development of upwelling at the eastern end of the Polish coast (in the vicinity of Władysławowo) can be deduced.
Źródło:
Oceanologia; 2002, 44, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes of water physical features as indicators of the convection movements in the coastal zone of the Pomeranian Bay
Zmiany cech fizycznych wód jako wskaźnik ruchów konwekcyjnych w strefie brzegowej Zatoki Pomorskiej
Autorzy:
Kowalewska-Kalkowska, H.
Lejman, J.
Powiązania:
https://bibliotekanauki.pl/articles/85081.pdf
Data publikacji:
2003
Wydawca:
Akademia Pomorska w Słupsku
Tematy:
water temperature
salinity change
sea water
air temperature
wind condition
physical feature
indicator
convection movement
coastal zone
Pomeranian Bay
sea surface temperature
summer period
meteorological condition
surface water
Źródło:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2002-2003, 07
1643-0115
Pojawia się w:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrographic and hydrochemical conditions in the Gotland Deep area between 1992 and 2003
Autorzy:
Nausch, G.
Matthaus, W.
Feistel, R.
Powiązania:
https://bibliotekanauki.pl/articles/48546.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
nutrient pool
temperature
hydrography
hydrochemical condition
ventilation
nutrient distribution
bottom water
salinity
Baltic Sea
stagnation period
hydrographic condition
Gotland Deep
Opis:
The paper describes the hydrographic-hydrochemical development in the eastern Gotland Basin between the major saltwater inflows into the Baltic Sea in 1993 and 2003. This period is characterised by only low inflow activity. The most important hydrographic events were the effects of the very strong inflow in 1993 and the weak inflows in 1993/1994 and 1997. The 1993/1994 inflows led to deep-water renewal, a steep fall in deep-water temperatures, and increasing salinity. The effects of the inflow of very warm, saline and oxygen-rich water in autumn 1997 were observed in the deep water in 1998, resulting in temperatures rising to 7◦C. The recent renewal in spring 2003 is reflected in the decreasing temperature, higher salinity and improved ventilation of the bottom water. Changes in the redox conditions exert a considerable influence on the nutrient distribution. During stagnation periods, there is enrichment of phosphate and ammonium, while nitrate is absent. Thus, around 31 μmol l−1 ammonium and 7 μmol l−1 phosphate were measured prior to the water renewal in 2003. Deepwater ventilation results in lower phosphate concentrations of around 2 μmol l−1, the nitrification of ammonium and the occurrence of nitrate. For the observation period, an estimate of nutrients stored in the deep water was done for the eastern Gotland Basin. During the recent stagnation period, there was an increase of up to 150% in the phosphate pool below the halocline, whereas the pool of inorganic nitrogen compounds decreased to 80% compared with 1992 when the previous stagnation period had ended. Under specific circumstances, these unbalanced nutrients can be made available to the upper water layers and can induce large-scale blooms of algae, especially of cyanobacteria.
Źródło:
Oceanologia; 2003, 45, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inflow waters in the deep regions of the Southern Baltic Sea - transport and transformations
Autorzy:
Piechura, J.
Beszczynska-Moller, A.
Powiązania:
https://bibliotekanauki.pl/articles/48744.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
transport
temperature
hydrography
deep region
transformation
environment
salinity
Baltic Sea
ecosystem
inflow water
mixing
Opis:
A medium-sized inflow (about 200 km3 according to IOW data, – personal communication) of saline water into the southern Baltic Sea occurred during January 2003. Unlike any previously observed inflow, this one brought very cold water, of temperatures around 1–2◦C and less. Since the temperature of the deep water in the southern Baltic before the inflow was exceptionally high (11–12◦C), the inflowing waters produced dramatic changes and a steep temperature gradient. The movement of the inflowing waters through the deep basins and channels of the Baltic Sea from the Arkona Basin to the Gdańsk Deep during next 4–8 months is described. Frequent mesoscale structures and intensive mixing followed the eastward transport of the inflow water, particularly in the Bornholm Deep and Słupsk Furrow. The present paper is based on data collected during of 6 cruises r/v ‘Oceania’ between December 2002 and August 2003. The last cruise in August took place in order to assess the long-term consequences of the inflow.
Źródło:
Oceanologia; 2003, 45, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nodularia spumigena blooms and the occurrence of hepatotoxin in the Gulf of Gdańsk
Autorzy:
Mazur, H.
Plinski, M.
Powiązania:
https://bibliotekanauki.pl/articles/48762.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
nutrient concentration
Cyanoprokaryota
water temperature
nitrogen
Nodularia spumigena
hepatotoxin
Baltic Sea
occurrence
bloom
Gdansk Gulf
phosphorus
toxin
light intensity
Opis:
Nodularia spumigena forms extensive summer blooms in the Baltic Sea. The occurrence of the blooms is determined by water temperature, light intensity and nutrient concentration; levels of nitrogen and phosphorus in particular are critical. The time of the seasonal maximum and intensity of the Nodularia bloom in the Gulf of Gdańsk vary significantly from year to year. In 2001 a rapid and massive proliferation of N. spumigena was observed in late June – early July. The concentration of nodularin in water ranged from 90 to 18 135 μg dm−3 and in lyophilised phytoplankton samples from 3000 to 3520 μg g−1 d.w. (dry weight). Such a high concentration of toxin in the recreational waters of the Gulf of Gdańsk constitutes a health risk for users of bathing areas. In 2002, the N. spumigena bloom was less dense, but lasted longer, with a maximum in late July – early August. In 2002 the concentration of nodularin did not exceed 12.6 μg dm−3 in water and 919 μg g−1 d.w. in lyophilised phytoplankton samples. Other cyanobacterial toxins – microcystins and anatoxin-a – were also detected in the coastal waters of the Gulf of Gdańsk.
Źródło:
Oceanologia; 2003, 45, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
PCBs in phytoplankton in the Odra Estuary
Autorzy:
Konat-Stepowicz, J.
Kowalewska, G.
Powiązania:
https://bibliotekanauki.pl/articles/48775.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
polychlorinated biphenyl
turbidity
temperature
Odra estuary
pigment content
salinity
Baltic Sea
phytoplankton
redox potential
oxygen
Opis:
Eleven PCB congeners were determined in phytoplankton samples collected from the Odra Estuary at 9 stations in 2001–2002. The PCB concentrations were related to the temperature, turbidity, salinity, oxygen and redox potential of the water as well as to the pigment content in the samples. The results indicate that phytoplankton and the detritus derived from it play a crucial role in the distribution of PCBs, their transfer from the water column to sediments and from the Estuary to the sea. The species composition of the phytoplankton occurring in this area could also be very important as regards the sorption of PCBs.
Źródło:
Oceanologia; 2003, 45, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Warm waters of summer 2002 in the deep Baltic Proper
Autorzy:
Feistel, R.
Nausch, G.
Mohrholz, V.
Lysiak-Pastuszak, E.
Seifert, T.
Matthaus, W.
Kruger, S.
Hansen, I.S.
Powiązania:
https://bibliotekanauki.pl/articles/47540.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
temperature
hydrography
inflow
warm water
summer
salinity
Baltic Sea
oxygen condition
Opis:
From October 2002 until March 2003 surprisingly warm, oxygenated waters were frequently encountered in the Baltic Sea in the area between the Bornholm and Fårö Deeps from the halocline down to the bottom. Owing to their ventilation effect in the stagnating deep waters, their occasional observations have partly been incorrectly attributed to the inflow events of October 2002 or January 2003. The emergence of some of these waters can be traced back to the exceptional summer weather conditions in August and September 2002 in central Europe. The warm waters played a remarkable renewal pacemaker role for the subsequent important winter inflow of January 2003. The evolution of this summer inflow is described and possible causes are discussed.
Źródło:
Oceanologia; 2003, 45, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ zmian temperatury powierzchni oceanu na Morzu Norweskim na temperaturę powietrza na Svalbardzie i Jan Mayen (1982-2002)
The influence of the changes in sea surface temperature of the Norwegian Sea on the air temperature at Svalbard and Jan Mayen (1982-2002)
Autorzy:
Kruszewski, G.
Marsz, A. A.
Zblewski, S.
Powiązania:
https://bibliotekanauki.pl/articles/260931.pdf
Data publikacji:
2003
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
temperatury powietrza
temperatury powierzchni oceanu
Morze Norweskie
air temperature
sea surface temperature
Norwegian Sea
Opis:
This work deals with correlations between SST in the Norwegian Sea and air temperature at selected stations located in the Atlantic sector of Arctic (Bjornoya, Hornsund, Svalbard-Lufthavn, Ny Alesund and Jan Mayen). The southern and central parts of the Norwegian Sea show the strongest correlation with the air temperature at the above mentioned stations, whereas the northern parts of this sea show weaker correlation. Apart from synchronic correlations (occurring in the same months) asynchronic correlations have been found. The latter are generally much stronger than the synchronic ones. The predominant influence on the changes in air temperature at the stations have the winter SST (JFMA) in the central part of the Norwegian Sea (grid 2° x 2°, 67°N, 010°E). These winter SST show quite strong correlations with monthly air temperature at Bjornoya, Hornsund, Svalbard-Lufthavn and Jan Mayen in July, August and September. At Ny Alesund station the period with statistically significant correlation between the air temperature and the winter SST is limited to September. The strongest correlation can be observed in August (see Table 4). The observed correlations result from modification in atmospheric circulation, caused by increased heat volume in the Norwegian Sea. Such modification is reflected in the increased frequency of occurrence of meridional atmospheric circulation, which is accompanied by the increase in the frequency of air advection from the S to this sector of Arctica. Some correlations which show more significant time shift have also been observed (see Table 5). Winter SST indicate positive correlations with air temperature observed at Bjornoya and Horn-sund in August and September the following year and at Svalbard-Lufthavn in September. At Ny Alesund station the coefficients of correlation with the air temperature in the following year are increased but they do not reach the statistically significant level. Another period with statistically significant correlations is November and December the following year; significant correlations with winter SST occur at Bjornoya (r = 0.71) and all stations located on Spitsbergen (r = 0.57). The correlations of SST with air temperature observed at Jan Mayen the following year are different, i.e. the presence of strong correlations is limited to summer season - July, August and September (r ~ 0.6). The correlations with winter SST occurring in November and December the following year is connected with warm masses carried to this region together with waters with the West Spitsbergen Current. Correlations between SST and air temperature present in summer and at the end of summer the following year may probably be influenced by the modification of atmospheric circulation. The only significant correlation with summer (July and August) SST indicates the temperature of February the following year at stations located on Spitsbergen and Jan Mayen. These correlations are negative (r ~ -0.55 - -0.50). The reason for occurrence of such correlations is not clear. The changeability of winter SST in the central part of the Norwegian Sea explains from 20% (Hornsund) to 32% (Bjornoya) of changeability in annual air temperature at the above mentioned stations in the same year and from 34% (Jan Mayen) to 41% (Hornsund) of changeability in annual air temperature in the following year. The increased level of explanation of changeability in air temperature the following year influenced by winter SST is connected with the delayed flowing of the Atlantic waters to high latitudes carried with the Norwegian Current and the West Spitsbergen Current.
Źródło:
Problemy Klimatologii Polarnej; 2003, 13; 59-78
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 135

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