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Tytuł:
On the possibility of convective overturning in the Slupsk Furrow overflow of the Baltic Sea
Autorzy:
Zhurbas, V.
Elken, J.
Paka, V.
Piechura, J.
Chubarenko, I.
Vali, G.
Golenko, N.
Shchuka, S.
Powiązania:
https://bibliotekanauki.pl/articles/48298.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Baltic Sea
deep water
dense water
density stratification
gravity current
numerical simulation
saline water
Slupsk Furrow
transverse circulation
water mass
Opis:
Closely spaced CTD transects across the Słupsk Furrow displayed a ‘downward- bending’ of salinity contours below the salinity interface on the southern flank due to a transverse circulation in the saline water overflow. Numerical simulation of a gravity current in an idealized channel with geometry, dimensions and initial density stratification all much the same as in the Słupsk Furrow was applied to verify whether the downward-bending could be transformed into an inverted density stratification. Some arguments in favour of the possibility of convective overturning due to the differential transverse advection beneath the gravity current, brought on by the numerical simulations, are discussed.
Źródło:
Oceanologia; 2011, 53, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Propagacja ciepłych anomalii w Prądzie Zachodniospitsbergeńskim
Warm anomalies propagation in the West Spitsbergen Current
Autorzy:
Walczowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/260779.pdf
Data publikacji:
2007
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
Prąd Zachodniospitsbergeński
Woda Atlantycka
klimat
Arktyka
Arctic
West Spitsbergen Current
Atlantic Water
climate
Opis:
Badania Prądu Zachodniospitsbergeńskiego prowadzone przez Instytut Oceanologii PAN wykazały skomplikowaną strukturę transportu Wody Atlantyckiej w stronę Oceanu Arktycznego. Od roku 2004 zauważalne było intensywne ocieplenie się prądu. Dzięki obserwacji adwekcji ciepłych anomalii, określono pręd-kość propagacji sygnału przez wschodnią i zachodnią gałąź Prądu Zachodniospitsbergeńskiego. Zarówno wzrost temperatury, jak struktura transportu Wody Atlantyckiej mają istotne znaczenie dla klimatu i warunków ekologicznych Arktyki.
Progressive warming of the West Spitsbergen Current (WSC) has been observed by Institute of Oceanology Polish Academy of Science (IOPAS) since summer 2004. Northward shifting of the Atlantic Water tongue was considerable; between 2004 and 2006 isotherm 5°C at 100 m moved to the north mort than 2° of latitude. Comparing published results from the Svinoy Section with IOPAS data, rate of warm impulse propagation in the WSC eastern branch has been estimated as 3–35 cm/s. In the western branch observations of warm anomalies allowed to estimate warm signal propagation mean velocity as 1.9–2.1 cm/s.
Źródło:
Problemy Klimatologii Polarnej; 2007, 17; 71-76
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coherent current oscillations and water exchange in the straits of the Gulf of Riga
Autorzy:
Talpsepp, L.
Powiązania:
https://bibliotekanauki.pl/articles/49149.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
current
water exchange
coherent current
Riga Gulf
Gulf of Riga Project
Baltic Sea
Opis:
The water exchange processes through the Irbe and Virtsu (Suur) Straits were investigated in 1993–1997 within the framework of a five-year study programme – the Gulf of Riga Project. Simultaneous current measurement data from autonomous mooring stations in both straits were available for the analysis in two periods. In addition to the dominant signals – inertial oscillations in the Virtsu Strait and diurnal oscillations in the Irbe Strait – low-frequency oscillations were found in both straits. During the experiment in July–August 1994, 12–14-day oscillations were observed in both straits: the maximum phase lag in the Virtsu Strait was 1 day. The other important low-frequency periodic component in both straits was 88 hours. In this case, the phase lag in the Virtsu Strait was about 20 hours. In the 1995 experiment in the Irbe Strait, 42-hour oscillations were observed with a phase lag of 10–12 hours. The amplitude was about 30 cm s−1 in both straits. As in Lilover et al. (1998), where the flow regime in the Irbe Strait was observed, we can interpret these oscillations as being wind-generated. The present work shows the existence of these disturbances also in the Virtsu Strait. The 88-hour oscillations observed in July–August 1994 can be interpreted as the first mode of the basin’s eigenoscillations according to the concept of Otsmann et al. (1997) of a basin with two separate outlets. The lowest frequency oscillation with the period of 12–14 days seemed to propagate to the Gulf of Riga from the Baltic Proper, but the generating force could not be established because there was no noticeable variability between depressions and anticyclones during that period. Based on the current measurements, two types of water exchange through the Irbe strait were established: the outflow over the whole cross-section of the strait, and a bidirectional flow with an inflow near the southern shore and increasing inflow in the near-bottom layers and an outflow in the northern part of the strait.
Źródło:
Oceanologia; 2005, 47, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Periodic variability of currents induced by topographically trapped waves in the coastal zone in the Gulf of Finland
Autorzy:
Talpsepp, L.
Powiązania:
https://bibliotekanauki.pl/articles/48759.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
trapped wave
Sopot
current
water exchange
Finland Gulf
topographical wave
Pakri Bay
conference
Baltic Sea
Estonia
Opis:
The aim of this paper is to examine the water exchange regime between the bays of northern Estonia (Pakri Bay, Ihasalu Bay and Muuga Bay) and the open part of the Gulf of Finland. To this end, the current measurements and CTD-castings performed at the border of the bays and the open part of the Gulf of Finland in summer 1994, 1995–96 and 1997 are analysed. All the current measurements displayed one feature in common: the existence of periodic variability with a current amplitude of between 5 and 25 cm s−1 and a variability period of 3–4 days (68 hours in Pakri Bay, 72 hours in Muuga Bay and 78 hours in Ihasalu Bay). The amplitudes of this variability differed during different time periods of the experiment and in different parts of the southern Gulf of Finland. The hypothesis was propounded that this variability is the result of bottom-trapped waves, as had been found in many other regions of the Baltic Sea (Aitsam & Talpsepp 1982, Talpsepp 1983). To interpret the results of the measurements, a model of bottom-trapped waves for this region was used. This was the short-wave version of Huthnance’s (1978) numerical model of coastal-trapped waves, according to which the wave parameters for the experimental regions were calculated. Comparison of the model and the measurements implies that coastal-trapped waves do exist off the southern coast of the Gulf of Finland.
Źródło:
Oceanologia; 2006, 48, S
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phenotypic responses to water flow and wave exposure in aquatic plants
Autorzy:
Szmeja, J
Galka, A.
Powiązania:
https://bibliotekanauki.pl/articles/57001.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
water flow
aquatic plant
Polska
river
clonal growth
wave exposure
allocation
botany
current velocity
phenotypic variation
lake
Opis:
Plastic responses of 10 aquatic plant species from 5 rivers and 5 lakes in NW Poland were examined. Chara fragilis, C. delicatula, Potamogeton pectinatus, P. perfoliatus, P. natans, Spirodela polyrhiza, Hydrocharis morsus-ranae, Salvinia natans, Nymphoides peltata and Juncus bulbosus were the subject of research. In the running water of rivers, rhizophytes were generally bigger and they allocated from 0.6% to 58.6% more biomass for anchoring in the substrate than in stagnant water (ox bow lakes). In both flow variants rhizophytes allocated a similar biomass fraction for generative reproduction. On the other hand, under the influence of water flow pleustophytes reduced the mass of an individual (Spirodela by 25%, Hydrocharis 67%, Salvinia 77%) and emergent structures (p<0.001), and the number of sporangia (p<0.001). In both flow variants the input of biomass to generative reproduction was the same (Salvinia), or it was greater in running water (Hydrocharis; an increase from 4.9±1.3% to 15.1±3.6%). Under the conditions of strong wave action, in comparison with the lack of this environmental factor, Chara delicatula was several times shorter (p<0.001). However, it was also stouter, and as a result it had similar mass. In the areas of wave action the plant allocated 88.8% of its mass for anchoring in the substrate, whereas when there were no waves, only 22.7%.
Źródło:
Acta Societatis Botanicorum Poloniae; 2008, 77, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Waves, currents and sea level variations along the Letipea - Sillamäe coastal section of the Southern Gulf of Finland
Autorzy:
Suursaar, U.
Powiązania:
https://bibliotekanauki.pl/articles/48913.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
wave
variation
hydrodynamic condition
measurement
Doppler current prolifer
calibration
semi-empirical hindcast
water parameter
upwelling
coastal jet
climate change
Baltic Sea
Letipea-Sillamae coastal section
Finland Gulf
Opis:
Variations in the hydrodynamic conditions were studied on the basis of 336 days of measurements with a Doppler current profiler. With wave data as a calibration reference, a semi-empirical hindcast of wave parameters is presented in the fetch- limited near-shore area for the period 1966–2008. A resultant 4–6 cm s−1 westward current dominated along the coast. Occasional fast sub-surface westward currents under modest wind forcing, as well as asymmetrical vertical profiles for westward and eastward currents indicated the influence of upwelling-related baroclinic coastal jets. The average frequency of upwelling was estimated at 17%; some of the events were identified in near-homothermic winter conditions on the basis of salinity and multi-layer flow records. While the mean sea level trend at Narva-Jõesuu roughly approximated the global estimates for 1899–2009, the annual maximum sea level increase was 5–8 mm yr−1. Both mean and maximum wave heights declined as a result of decreasing winds from the north.
Źródło:
Oceanologia; 2010, 52, 3; 391-416
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Productivity of Using Current Generating Circular Tanks for Tilapia Fingerling (Oreochromis niloticus (Linnaeus, 1758)) Production
Autorzy:
Suryadi, Ibnu Bangkit Bioshina
Fadylah, M. Ihsan
Iskandar, Iskandar
Yustiati, Ayi
Powiązania:
https://bibliotekanauki.pl/articles/1076625.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Oreochromis niloticus
round tanks
tilapia
venturi aeration
water current
Opis:
This research conducted to determine the optimum water current models for growth performance and survival rate of tilapia fingerlings (O. niloticus) in circular tanks. The method used in this research is Completely Randomized Design (CRD), which consists of three treatments and four replications. The treatments are circular tanks without water current (control), circular tanks with 0.1 m s-1 water current and circular tanks that combine 0.1 m s-1 water current with venturi aeration. Tilapia fingerlings were kept in circular tanks with 30 cm diameter and 37 cm of height, with water level of 30 cm. 50 fingerlings with size of 2-3 cm were reared in every circular tank. The feed is given 3 times daily with a feeding rate of 5% from biomass. Absolute growth rate, specific growth rate, survival rate, feed conversion ratio and feed efficiency were observed every ten days, while water quality was assessed weekly. After 42 days of rearing, the results showed that the 0,1 m s-1 water current combined with venturi aeration had the highest dissolved oxygen level (6.5-7.3 mg L-1), the lowest ammonia levels (0.15-0.20 mg L-1), 92% survival rate, 1.17 g absolute growth rate, 3.65% specific growth rate, 1.3 feed convertion ratio and 77.8% feed efficiency.
Źródło:
World News of Natural Sciences; 2019, 27; 85-95
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of currents over the southern slope of the Gulf of Finland
Autorzy:
Suhhova, I.
Pavelson, J.
Lagemaa, P.
Powiązania:
https://bibliotekanauki.pl/articles/48946.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
stratification
upwelling
downwelling
Finland Gulf
coastal sea water
seasonal thermocline
current velocity
Źródło:
Oceanologia; 2015, 57, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lumped Parameter Analysis of Bridge Wire in an Electro Explosive Device of a Power Cartridge for Water-Jet Application: A Case Study
Autorzy:
Parate, Bhupesh Ambadas
Chandel, Sunil
Shekhar, Himanshu
Powiązania:
https://bibliotekanauki.pl/articles/1063002.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
all fire current
bridge wire
electro-explosive devices
igniter
lumped parameter
no fire current
power cartridge
water-jet disruptor
Opis:
In an armament system an electro-explosive device (EED) essentially converts electrical energy into heat which further initiates the explosive train with its accompanying temperature rise. The first function of an EED in a power cartridge is to provide adequate electrical current to cause ignition of the highly sensitive explosive i.e. lead styphnate. The electrical current accomplishes ignition by heating the bulb of lead styphnate which produces enough heat to cause the booster to ignite. The booster which is in the immediate vicinity augments the ignition of the propellant further. The igniter must be held firmly in place with the booster in the tube. Understanding of the initiation of explosives using a bridge wire in EEDs is important for engineers, designers and scientists to develop new theories. In this research article, theoretical and experimental work has been reported pertaining to bridge wire devices in power cartridges for water-jet applications. The objective of the present research work is to use lumped parameter analysis of a bridge wire in an electro explosive device of a power cartridge for water-jet application. A lumped parameter theory is proposed for the analysis of EEDs. A time constant of 3.35 s has been determined using the lumped parameters. The Biot number is less than 0.1 indicating that transient phenomenon is applied.
Źródło:
Central European Journal of Energetic Materials; 2020, 17, 3; 408-427
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ADCP-referenced geostrophic velocity and transport in the West Spitsbergen current
Autorzy:
Osinski, R.
Wieczorek, P.
Beszczynska-Moller, A.
Goszczko, I.
Powiązania:
https://bibliotekanauki.pl/articles/48340.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Arctic circulation
Atlantic water
acoustic Doppler current profiler
geostrophic flow
West Spitsbergen current
Źródło:
Oceanologia; 2003, 45, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Stocking Density on Water Quality of Tilapia (Oreochromis niloticus Linnaeus, 1758) in Round Container with Current and Venturi Aeration System
Autorzy:
Nariswari, Shalsabilla
Yustiati, Ayi
Rostini, Iis
Suryadi, Ibnu Bangkit Bioshina
Powiązania:
https://bibliotekanauki.pl/articles/1030997.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Current
Microbubble
Oreochromis niloticus
Round Container
Stocking Density
Tilapia
Venturi Aeration
Water Quality
Opis:
This research aims to determine the optimal stocking density for the water quality of tilapia in a round container with current and venturi aeration system. Research was conducted at the Aquaculture Laboratory Building 4th, Faculty of Fisheries and Marine Sciences, Universitas Padjadjaran. The research method was carried out experimentally using the Completely Randomized Design (CRD) method consisting of three treatments with five replications, namely stocking density treatment with 15 fish, 22 fish, 30 fish using 15 L water in a container. The fish used are 3-5 cm of tilapia fry. Fish were treated for 40 days. The feed given is 5% biomass which is updated every 10 days. The parameters observed were water quality consist of temperature, dissolved oxygen (DO), pH, ammonia levels which were measured every 10 days. Based on the research results, it was concluded that the best treatment was stocking density of 15 fish/15 L in a round container with current and venturi aeration system with an average temperature of 26 °C, dissolved oxygen of 5.62 mg/l, pH of 7.09, ammonia levels 0.007 mg/l.
Źródło:
World Scientific News; 2020, 145; 397-408
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production of [18F] fluoride with a high-current two layer spherical gold target
Autorzy:
Mirzaii, M.
Afarideh, H.
Hadji-Saeid, S.
Aslani, G.
Ensaf, M.
Powiązania:
https://bibliotekanauki.pl/articles/147973.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
water target
[18F] fluorine
FDG
PET
high current
Opis:
A new automated target for high yield production of aqueous [18F] fluoride at high beam currents has been constructed for a cyclotron at NRCAM in Karaj (Cyclone 30). It consists of one small golden sphere inside another target chamber, mounted into a special holder, which provides rapid cooling by water flow around and inside the sphere. The target is irradiated with 28 MeV protons. The incident energy on the target chamber is 18 MeV. This target is operated without external overpressure and has been tested for beam currents up to 60 ěA. The measured target yield is 80% of the theoretically calculated yield of 18F, which is used for the synthesis of [18F] 2-fluoro-2-deoxy-D-glucose.
Źródło:
Nukleonika; 2004, 49, 1; 23-27
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of landfast ice on the hydrography and circulation of the Baltic Sea coastal zone
Autorzy:
Merkouriadi, I.
Lepparanta, M.
Powiązania:
https://bibliotekanauki.pl/articles/49047.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Finland Gulf
hydrography
landfast ice
circulation
Baltic Sea
coastal zone
water temperature
salinity
current
Źródło:
Oceanologia; 2013, 55, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Increases in the temperature and salinity of deep and intermediate waters in the West Spitsbergen Current region in 1997–2016
Autorzy:
Merchel, M.
Walczowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/2079090.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
climate change
deep water
temperature
salinity
intermediate water
West Spitsbergen current
hydrographic data
Opis:
This study investigated the temporal variability in the basic physical properties of deep and intermediate waters in the West Spitsbergen Current region at 76°30’N latitude from 1997 to 2016. Emphasis was placed on quantifying the changes in temperature and salinity and determining the potential drivers of these changes. Hydrographic data were obtained during annual summer cruises aboard the r/v Oceania in the Nordic Seas. The increase in the water temperature, which was especially strong in the western part of the investigated section, was associated with considerable changes in the water layers salinity. The temperature and salinity of the intermediate water increased much faster (0.021°C yr−1 and 0.0022 yr−1, respectively) than those of the deep water (0.009°C yr−1 and 0.0004 yr−1, respectively). The warming rate in the upper 2000 m was also higher than the mean warming rate of the global ocean. The source of the deep water temperature and salinity increases was the deep water inflow from the Arctic Ocean into the Greenland Sea. In contrast, the increase in these properties in the intermediate water was associated with the advection of warmer and more saline Atlantic Water from the North Atlantic to the Nordic Seas.
Źródło:
Oceanologia; 2020, 62, 4PA; 501-510
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperatura wód atlantyckich na głębokości 200 m w Prądzie Zachodniospitsbergeńskim (76.5°N, 9-12°E), a temperatura powierzchni morza w tym rejonie (1996-2011)
Temperature of the Atlantic Water at a Depth of 200 m in the West Spitsbergen Current (76.5°N, 9-12°E) and the Sea Surface Temperature in this Region (1996-2011)
Autorzy:
Marsz, A. A.
Styszyńska, A.
Powiązania:
https://bibliotekanauki.pl/articles/260985.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
Arktyka Atlantycka
Prąd Zachodniospitsbergeński
wody atlantyckie
SST
korelacje
Atlantic Arctic
West Spitsbergen Current
Atlantic Water
correlation
Opis:
Praca omawia rozkład w czasie i przestrzeni związków, jakie zachodzą między temperaturą Wód Atlantyckich w Prądzie Zachodniospitsbergeńskim i temperaturą powierzchni morza (SST) na wodach wokół-spitsbergeńskich. Wykorzystano pomiary temperatury Wód Atlantyckich prowadzone przez Instytut Oceanologii PAN na głębokości ~200 m na profilu 76,5°N, 9-12°E (oznaczenie TW200). Szereg TW200 jest krótki (1996-2011) i stanowi średnią z pomiarów wykonywanych w lipcu i sierpniu. Celem pracy jest określenie w jakiej mierze stosowane powszechnie zbiory danych SST charakteryzują na tych akwenach zasoby ciepła w głębszych warstwach wód. Stwierdzono, że zbiory te dobrze charakteryzują podpowierzchniowe zasoby ciepła Wód Atlantyckich w chłodnej porze roku – okresie zimowego wychładzania oceanu – od listopada do kwietnia-maja. Jest to związane z działaniem intensywnej konwekcji. W sezonie ciepłym (od czerwca do października) związki między TW200 i SST stają się słabe ze względu na tworzenie się w przypowierzchniowej warstwie oceanu warstwy wygrzanych wód, stabilnych hydrostatycznie. W wyniku tego kontakt wód powierzchniowych z wodami zalegającymi głębiej ustaje i zmiany SST kształtują się pod wpływem zmian bilansu cieplnego powierzchni oceanu, bez większego wpływu zasobów ciepła wód zalegających głębiej. W przekrojach miesięcznych najsilniejsze związki między TW200 i SST zachodzą w kwietniu tego samego roku (SST wyprzedza moment pomiaru TW200) i w grudniu tego samego roku (SST jest opóźnione względem TW200). W ujęciu sezonowym najsilniejsze związki TW200 zachodzą ze średnią SST z okresu styczeń-kwiecień (SST01-04). Z wartością TW200 z danego roku związki takie zachodzą dwukrotnie – w tym samym roku co pomiar TW200 i w roku następnym. Rozkład współczynników korelacji wartości TW200 z SST na obszarze północnej części Morza Norweskiego, zachodniej części Morza Barentsa i NE części Morza Grenlandzkiego wskazuje, że wartość TW200 stanowi jeden z najważniejszych wskaź-ników klimatycznych dla tej części Arktyki.
The work discusses the distribution in time and space of relationships taking place between the temperature of the Atlantic Water in the West Spitsbergen Current and sea surface temperature of waters in the vicinity of Spitsbergen. Temperature of the Atlantic water is measured by the Institute of Oceanology of Polish Academy of Sciences at a depth of ~200 m along the profile 76.5°N, 9-12°E and is the average of the measurements taken in July and August along the profile (marked TW200). The measurement series TW200 is short (1996-2011; 16 years). The aim of this study is to determine the extent to which the commonly used SST data sets describe the resources of warm water in the deeper layers of the sea area. It was found that the SST data sets very well characterized subsurface warm water resources of the Atlantic in the cold season of the year – the winter cooling of the ocean – from November to April-May. It is connected with the action of intensive convection. In the period of warm season (June to October) the relationship between TW200 and SST becomes weak due to the formation of a hydrostatically stable layer of warm water in the surface layer of the ocean. As a result the contact of surface waters with deeper layers of water ceases and changes in SST are influenced by changes in ocean surface heat balance, without much impact of heat resources from deeper ocean. The strongest monthly correlations between the TW200 and SST occur in April of the same year (SST precedes time of measurement TW200) and in December of the same year (SST is delayed relatively to TW200). The strongest seasonal correlations between TW200 and mean SST occur from the period of January-April (SSTJFMA). Such correlations between the value of TW200 and SST in a given year occur twice – in the same year when TW200 was measured and the following year. The distribution of coefficients of correlation between TW200 and SST in the northern part of the Norwegian Sea, the western part of the Barents Sea and NE part of the Greenland Sea indicates that the value of the TW200 is one of the most important climatic factors for this part of the Arctic.
Źródło:
Problemy Klimatologii Polarnej; 2012, 22; 43-56
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 23

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