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Wyświetlanie 1-15 z 138
Tytuł:
Comparison of measured and modelled water temperature for the southern Baltic Sea during 1998-2001
Autorzy:
Piliczewski, B.
Powiązania:
https://bibliotekanauki.pl/articles/972881.pdf
Data publikacji:
2001
Wydawca:
Instytut Morski w Gdańsku
Tematy:
HIROMB
water temperature
Opis:
The article presents results of verification of water temperature forecasts from HIROMB model, which were compared with every-day measurements from some selected JMGW coastal hydrological stations during 1998-2001. In addition to that the model results were also confronted with CTD measurements from the Gdańsk Deep.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 2001, 28, 2; 89-95
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of measured and modelled water temperature for the southern Baltic Sea during 1998-2001
Autorzy:
Piliczewski, B.
Powiązania:
https://bibliotekanauki.pl/articles/1920638.pdf
Data publikacji:
2001
Wydawca:
Instytut Morski w Gdańsku
Tematy:
HIROMB
water temperature
Opis:
The article presents results of verification of water temperature forecasts from HIROMB model, which were compared with every-day measurements from some selected JMGW coastal hydrological stations during 1998-2001. In addition to that the model results were also confronted with CTD measurements from the Gdańsk Deep.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 2001, 28, 2; 89-95
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measured and predicted values of water temperature and salinity with special focus on the surface layer
Autorzy:
Kamińska, M.
Powiązania:
https://bibliotekanauki.pl/articles/1920509.pdf
Data publikacji:
1999
Wydawca:
Instytut Morski w Gdańsku
Tematy:
salinity
POLRODEX
water temperature
Opis:
The Baltic is a stratified sea. The upper layer is under the influence of atmospheric and terrestial factors. The mechanisms of these external factors on the surficial and subsurface water layer are well recognised but the vertical exchange in the water body is still not sufficiently investigated. Field measurements at sea are time consuming and expensive. A model of the Baltic Sea distributed to and accessible by institutions investigating the Baltic Sea is advantageous because of easier exchange modelled data. The modelling, especially of the surface layer is important due to the fact that outside the coastal zone continuous measurements of physical parameters is difficult. The comparison between measured in situ and modelled data serves as a tool for the corrections to HIROMB resulting in better approximation of real phenomena occurring in the Baltic Sea. Temperature and salinity values obtained on board rlv Baltica during the POLRODEX'97 expetriment were compared with modelled values. The analysis showed significant differences between in situ measurements and obtained from the HIROMB model.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 1999, 26, 1; 97-111
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal and Oxygen Conditions in Carp Ponds During the Summer Period
Autorzy:
Wiśnios, M.
Kanownik, W.
Powiązania:
https://bibliotekanauki.pl/articles/124350.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
fish pond
dissolved oxygen
water temperature
Opis:
The work presents changes of oxygen indices in carp ponds during the summer season. The basis of the research were regular water tests conducted in two ponds: Mydlniki II intended for carp farming in the second year of fish production cycle and Bocian used for carp farming in the third (final) year of breeding. The temperature of pond water in July and August was optimal for development and farming of cyprinid fish and ranged from 16.6 to 30.5 °C. The lowest value of oxygen dissolved in water (6.4 mg·dm sup>-3) was registered in Mydlniki II pond and was higher than the oxygen optimum for carp (5 mg·dm sup>-3). Oxygen saturation in water of fish ponds exceeded the optimum upper limit value (168%) on a few dates, however, it posed no lethal threat for fish. In August in Bocian pond oxygen saturation fell within the range of optimal values, creating better conditions for fish development. In the secondary pond (Mydlniki II) it was found that oxygen saturation in water on 12 dates was lower than the low optimal value (96%).
Źródło:
Journal of Ecological Engineering; 2015, 16, 5; 144-150
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of daily water temperature fluctuations in lake Kierskie (West Poland)
Autorzy:
Ptak, Mariusz
Sojka, Mariusz
Nowak, Bogumił
Powiązania:
https://bibliotekanauki.pl/articles/1051197.pdf
Data publikacji:
2019-09-30
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
lake
water temperature
air temperature
wind speed
Poznań
Opis:
The paper presents the dynamics of daily water temperature fluctuations in Lake Kierskie (West Poland) and determines the effect of air temperatures and wind speed on the variability of the parameter (water temperature). The analysis was based on hourly water temperature values from the period from May 2012 to January 2018. The data analysis permitted the description of the thermal regime of waters in the lake in the hourly cycle in reference to each month, and designation of months characterised by the highest and lowest stability of water temperatures. More than half of the analysed days was characterised by a change in water temperature not exceeding 1°C. The course of water temperature showed strongly positive correlations with air temperature, and weak correlations with wind speed. Water temperatures in the lake were correlated the strongest with air temperatures with a 24 h time step.
Źródło:
Quaestiones Geographicae; 2019, 38, 3; 41-49
0137-477X
2081-6383
Pojawia się w:
Quaestiones Geographicae
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:
Influence of a lake on river water thermal regime: A case study of Lake Sławianowskie and the Kocunia River (Pomeranian Lakeland, Northern Poland)
Autorzy:
Nowak, Bogumił
Ptak, Mariusz
Stanek, Paulina
Powiązania:
https://bibliotekanauki.pl/articles/108570.pdf
Data publikacji:
2020
Wydawca:
Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
Tematy:
river-lake system
water temperature
measurement data
Opis:
Water temperature is one of the basic physical parameters of rivers and lakes. Rising temperature can transform these ecosystems over a broad range of factors (water mixing, water quality, biological conditions, etc.). In the case of rivers, their thermal regimes also can be modified by local conditions (e.g., tree cover, adjoining water bodies, etc.). In this paper, we address the functioning of the river-lake system in northern Poland (Kocunia River-Lake Sławianowskie) in terms of the effect of the lake on temperature conditions in the river. Dependencies in daily water temperatures between stations located above and below the lake were assessed with linear regression. Based on daily morning water temperatures for the period 2012-2017, it was determined that water temperature in the river below the lake was higher than at the measurement site located above the lake by an average of 1.1°C. The greatest differences were recorded in summerautumn months when average monthly downstream water temperatures were as much as 3.9°C higher than upstream water temperatures. This phenomenon is an example of a local factor (the lake) magnifying global factors, i.e. rising temperatures associated with climate change. The information in this paper can provide future reference for decision makers and state institutions with responsibility for measures aimed at reducing the effects of climate change.
Źródło:
Meteorology Hydrology and Water Management. Research and Operational Applications; 2020, 8, 1; 78-83
2299-3835
2353-5652
Pojawia się w:
Meteorology Hydrology and Water Management. Research and Operational Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes of the water temperature in Polish seaside resorts
Zmiany temperatury wody w polskich miejscowościach nadmorskich
Autorzy:
Swiatek, M.
Powiązania:
https://bibliotekanauki.pl/articles/84801.pdf
Data publikacji:
2016
Wydawca:
Akademia Pomorska w Słupsku
Tematy:
temperature change
sea water
water temperature
air temperature
Baltic coast
Polska
seaside resort
Opis:
Subject of the study are changes of the water temperature occurring on the Polish Baltic coast during years 1951-2010 (in Kołobrzeg, due to deficiencies in the data, for the years 1957-2010). It is expressed in the form of a linear trend. The study was based on the monthly average temperature of the sea water in the following stations: Świnoujście, Międzyzdroje, Kołobrzeg, Władysławowo, Hel and Gdynia. For most of analyzed stations an increase in average annual temperature of the water were observed. The largest one was recorded in Gdynia. In Świnoujście there were no significant changes in water temperature except for the slight its drop in June. A significant increase in the water temperature occurred in Międzyzdroje in February, March, April and May; in Kołobrzeg in January and March; in Władysławowo in January, February, March, April and June and in Hel and Gdynia in February, March, April, May, July and August. The greatest changes were in April in Hel and Gdynia.
Przedmiot badań stanowią zmiany temperatury wody zachodzące na polskim wybrzeżu Bałtyku w latach 1951-2010 (w Kołobrzegu ze względu na braki w danych w latach 1957-2010), wyrażone w formie trendu liniowego. W pracy wykorzystano średnie miesięczne wartości temperatury wody w następujących miejscowościach: Świnoujście, Międzyzdroje, Kołobrzeg, Władysławowo, Hel oraz Gdynia. W większości analizowanych stacji (oprócz Świnoujścia i Kołobrzegu) nastąpił wzrost średniej rocznej temperatury wody. Największy odnotowano w Gdyni, gdzie temperatura wody wzrastała średnio o około 0,02°C rocznie. Istotny statystycznie wzrost temperatury wody nastąpił w Międzyzdrojach w lutym, marcu, kwietniu i maju, w Kołobrzegu w styczniu i marcu, we Władysławowie w styczniu, lutym, marcu, kwietniu i w czerwcu, a w Helu i Gdyni w lutym, marcu, kwietniu, maju, lipcu i sierpniu. Największe zmiany następowały w kwietniu (w Helu i Gdyni powyżej 0,03°C rocznie). W Świnoujściu nie wystąpiły istotne zmiany temperatury wody z wyjątkiem niewielkiego jej spadku w czerwcu.
Źródło:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2016, 20
1643-0115
Pojawia się w:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Basic parameters of the thermal regime of rivers in the Vistula river catchment
Autorzy:
Oksiuta, Monika
Mikulska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2034232.pdf
Data publikacji:
2010-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
thermal regime
river water temperature
Vistula river catchment
Opis:
Seasonal and multi-annual variability of river water temperature has been analysed based on data from 24 gauge stations of the IMGW network. It has been characterised by means of several values of the thermal regime parameters: mean annual, semi-annual (November-April, May-October) and amplitude. The variability of water temperature in the catchment and in the stream network has been estimated. Measurement data included seven stations at the Vistula river. On the background of natural variability, rivers or their segments have been distinguished where water temperature is impacted by anthropopressure.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2010, 14; 185-192
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Occurrence and temporal variations of groundwater outflows in the Petuniabukta region, Spitsbergen
Autorzy:
Szczucińska, Anna Maria
Powiązania:
https://bibliotekanauki.pl/articles/2051520.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Svalbard
groundwater
springs
seeps
water temperature
specificconductivity
Źródło:
Polish Polar Research; 2011, 4; 361-374
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The colonization of hot water systems by Legionella
Autorzy:
Hruba, L
Powiązania:
https://bibliotekanauki.pl/articles/50226.pdf
Data publikacji:
2009
Wydawca:
Instytut Medycyny Wsi
Tematy:
Legionella pneumophila
hot water system
temperature effect
legislation
water temperature
building type
safety factor
Źródło:
Annals of Agricultural and Environmental Medicine; 2009, 16, 1; 115-119
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kongsfjorden and Hornsund hydrography - comparative study based on a multiyear survey in fjords of West Spitsbergen
Autorzy:
Prominska, A.
Cisek, M.
Walczowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/48487.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Kongsfjorden
Hornsund
hydrography
Atlantic water
transport
water column
water mass
water temperature
water salinity
Opis:
A recent study has shown increased warming in the fjords of west Spitsbergen. Their location is critical, as they are situated along the main northward pathway of Atlantic Water (AW) which is a great source of heat to the Arctic Ocean and the fjords. In the light of ongoing warming, we aim to discuss differences between the fjords under northward transformation of oceanic waters. We compared summer hydrographic conditions in two fjords located in two opposite ends of west Spistbergen: Hornsund in the south and Kongsfjorden in the north. The study is based on high resolution CTD measurements collected during Arctic cruises between 2001 and 2015. The emphasis was put not only on differences in water temperature, salinity and water masses but also the freshwater content (FWC), AW transport and heat delivery to the fjords. In general, the water in Kongsfjorden is on average 18C warmer and its salinity is higher by 0.5 compared to Hornsund. It is also characterized by two times greater transport of AW and heat delivery to the fjord. On the other hand, Hornsund reveals two times higher FWC. Both fjords undergo a gradual warming due to an increased presence of Atlantic origin waters. The ongoing warming is accompanied by an increase in variability of temperature and salinity dependent on the domination of the Sørkapp Current (SC) or the West Spitsbergen Current (WSC) on the West Spitsbergen Shelf (WSS). Nonetheless, Hornsund remains more Arctic-type fjord compared to Kongsfjorden, due to stronger blocking by SC.
Źródło:
Oceanologia; 2017, 59, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Coolant Water Flow Rate and Temperature Underside Cooling Slope on Solidification with Microstructure and Mechanical Properties of Casted AZ91 Mg Alloy
Autorzy:
Sahu, Sambeet
Kund, Nirmal
Powiązania:
https://bibliotekanauki.pl/articles/28099567.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
coolant water flow rate
coolant water temperature
cooling slope
microstructure
mechanical properties
Opis:
Present study describes about the effect of coolant water flow rate and coolant water temperature underside cooling slope on structural characteristics of casted AZ91 Mg alloy. Here, over the cooling slope, hot melt flows from top to bottom. Additionally, under the cooling slope, coolant water flows from bottom to top. Slurry gets obtained at bottom of cooling slope by pouring AZ91 Mg melt from top of the slope. Coolant water flow rate with coolant water temperature underside cooling slope warrant necessary solidification and shear to obtain AZ91 Mg slurry. Specifically, slurry at 5 different coolant water flow rates (4, 6, 8, 10, 12 lpm) and at 5 different coolant water temperatures (15, 20, 25, 30, 35°C) underside cooling slope are delivered inside metal mould. Modest coolant water flow rate of 8 lpm with coolant water temperature of 25°C (underside cooling slope) results fairly modest solidification that would enormously contribute towards enhanced structural characteristics. As, quite smaller/bigger coolant water flow rate/temperature underside cooling slope would reason shearing that causes inferior structural characteristics. Ultimately, favoured microstructure was realized at 8 lpm coolant water flow rate and 25°C coolant water temperature underside cooling slope with grain size, shape factor, primary α-phase fraction and grain density of 63 µm, 0.71, 0.68 and 198, respectively. Correspondingly, superior mechanical properties was realized at 8 lpm coolant water flow rate and 25°C coolant water temperature underside cooling slope with tensile strength, elongation, yield strength and hardness of 250 MPa, 8%, 192 MPa and 80 HV, respectively.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 2; 673--680
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature and ice regimes of waterbodies under the impacts of global warming and a hydropower plant
Autorzy:
Vyshnevskyi, Viktor Ivanovych
Powiązania:
https://bibliotekanauki.pl/articles/1445111.pdf
Data publikacji:
2020
Wydawca:
Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
Tematy:
water temperature
ice cover
Dnipro
Kyivska HPP
reservoir
remote sensing data
Opis:
Based on the results of regular monitoring and remote sensing data the patterns of water temperature and ice regime of the Dnipro River within Kyiv, as affected by global warming and a hydropower plant, were identified. The characteristic features of this stretch of the river are increasing water temperature, and the decreasing thickness and duration of ice cover. The largest water temperature increase is in summer, with a somewhat smaller increase in autumn. The increase of water temperature in spring is much less than the increase in air temperature. In summer, the gradient of water temperature increase is a little bit less than that of air temperature. In autumn, the gradient of water temperature increase is larger than the gradient of air temperature increase. From April to August the lowest water temperature is usually observed near the Kyivska hydropower plant (HPP), which is located upstream. During this period the water temperature downstream from HPP increases. The uneven daily operation of HPP causes the alternation of areas with different temperature along the Dnipro River. In the cold season the water temperature in the Dnipro River is usually higher than in other nearby urban water bodies. Freezing of the water area usually starts from the small and shallow lakes and ponds. The main branch of the Dnipro River freezes last. On the whole, the sequence of ice melting on the waterbodies is the reverse of the freezing process. The longest ice cover duration in spring is observed in the bays with small water exchange, mainly located at a large distance from Kyivska HPP.
Źródło:
Meteorology Hydrology and Water Management. Research and Operational Applications; 2020, 8, 2; 38-45
2299-3835
2353-5652
Pojawia się w:
Meteorology Hydrology and Water Management. Research and Operational Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of treated wastewater from the Lodz city agglomeration on the ice regime and water temperature of the Ner river
Autorzy:
Bartnik, Adam
Jokiel, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/1931398.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
Lodz (Łódź)
Human impact
ice phenomena
river regime
river water temperature
Opis:
The study attempts to answer the following question: Does human impact contribute to changes recorded in the Ner river ice regime? In replying to this question, data on water consumption in Lodz (Łódź) (a city in central Poland) in 1951-2017 were used, as well as observations of ice cover and all ice phenomena for the same period. The ice regime and water temperature of the river have changed over the past 70 years. The changes result not only from changes caused by global warming but also from additional fluctuations in this temperature as determined by changes in the quantity and quality of wastewater discharged into the river from the Lodz city agglomeration. The frequency of ice phenomena in the river decreased, and their duration dropped by almost half. This tendency was compounded by a decrease in number of days with ice phenomena, which in turn was caused by a rapid increase in the amount of waste and thermally polluted waters supplied from Lodz. The river water temperature has now stopped increasing. The course of the river ice regime now resembles that of a natural watercourse again.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2021, 25, 3; 194-203
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 138

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