scholarly journals The ice regime of Lake Ostrzyckie (Kashubian Lakeland, northern Poland)

2019 ◽  
Vol 19 (3) ◽  
pp. 105-112
Author(s):  
Katarzyna Barańczuk ◽  
Jacek Barańczuk
Keyword(s):  
Air Temperature ◽  
Meteorological Data ◽  
Winter Season ◽  
Ice Cover ◽  
Lake Ice ◽  
Duration Time ◽  
Northern Poland ◽  
Freezing Period ◽  
Ice Regime ◽  
Ice Phenomena

Abstract The article presents the ice phenology of Lake Ostrzyckie, which is a water body covering an area of 308 ha located in the central part of the Kashubian Lakeland, northern Poland. The analysis presented in the article is based on data from daily ice phenomena monitoring for the period of 1971–2010. Data including forms of lake ice, as well as the thickness of the ice cover were obtained from the Institute of Meteorology and Water. In order to present relations between the ice phenomena and air temperature the meteorological data from the Gdańsk University Limnological Station in Borucino were used. The article presents changes in the duration time of the ice seasons and changes in the ice cover duration time in relation to winter season (November–April) temperatures. The structure of the ice phenomena duration period observed on Lake Ostrzyckie consists of three different stages of ice cover formation. 94% of this time the lake is covered by permanent ice cover, the freezing period takes about 5%, and the break-up takes only 1% of the ice phenomena duration period. In general the ice phenomena in the lake can occur only in the years when the average air temperature in the winter is lower than 5.0°C, whereas the permanent ice cover is created when the average air temperature of the winter season is lower than 4.8°C. The maximum thickness of the ice cover is usually 23 cm, and the average is 14 cm.

scholarly journals Variability and course of occurrence of ice cover on selected lakes of the Gnieźnieńskie Lakeland (Central Poland) in the period 1976–2015

2018 ◽  
Vol 44 ◽  
pp. 00126 ◽  
Author(s):  
Bogumił Nowak ◽  
Dominik Nowak ◽  
Mariusz Ptak
Keyword(s):  
Air Temperature ◽  
Ice Cover ◽  
Maximum Thickness ◽  
Central Poland ◽  
Winter Half ◽  
Ice Regime ◽  
Ice Phenomena

The paper presents the analysis of the course of ice phenomena on four lakes (Lednica, Żnińskie Duże, Biskupińskie, Powidzkie) in central Poland in the period 1976–2015. The obtained results show changes in their ice regime that occurred over the last 40 years. An advance of the term of decline of ice cover was determined (by 2.5 day·dec-1on average for all lakes), as well as a reduction of duration of ice cover (by 4.4 day·dec-1 on average for all lakes), and a decrease in its maximum thickness (by 2 cm·dec-1 on average for all lakes). Such a situation should be associated with the observed warming, as confirmed by the course of air temperature for station Gniezno, where in the period of the winter half-year (November-April), an increase in temperature was recorded by 0.37°C·dec-1.

scholarly journals The ice regime of Lake Raduńskie Górne (Kashubian Lakeland, northern Poland)

2017 ◽  
Vol 17 (2) ◽  
pp. 61-70 ◽  
Author(s):  
Jacek Barańczuk ◽  
Elżbieta Bajkiewicz-Grabowska ◽  
Katarzyna Barańczuk ◽  
Wojciech Staszek
Keyword(s):  
Air Temperature ◽  
Ice Cover ◽  
Ice Dynamics ◽  
Winter Half ◽  
The Mean ◽  
Ice Regime ◽  
Cover Thickness ◽  
Ice Phenomena ◽  
Ice Phenology

AbstractThe paper presents assessment results of the ice dynamics on Lake Raduńskie Górne (Upper Radunia Lake) based on long-term observations of the course of ice phenomena. Interannual changes in lake ice phenology parameters (freeze-onset, ice-on, freeze duration, melt-onset, permanent ice cover duration, ice-off, melt duration) in the years 1961–2010 are discussed. In addition, the ice cover thickness was taken into consideration. The analysed parameters of ice phenology were compared to each other as well as to the mean air and water temperatures of the winter half-year (November–April). The main periods of the ice regime of the lake have been determined and described. The permanent ice cover constitutes on average 79%, freeze-up period 13%, and break-up period 8% of the whole time of ice phenomena. It was shown that the weather parameters crucial for ice formation are the mean air and surface water temperatures. On Lake Raduńskie Górne the ice phenomena can only occur when mean air temperature in the winter half-year, at Borucino wheather station, is lower than 4.9°C, and water temperature (at a depth of 0.4 m) is lower than 5.7°C. In turn permanent ice cover is created when the mean air temperature of the winter half-year is lower than 3.9°C. The maximum and mean ice cover thickness on Lake Raduńskie Górne ranged, respectively, from 0.5 to 50 cm, and from 0.5 to 38.3 cm. These parameters were strongly positively correlated (r = 0.87–0.88, p <0.05) with the duration of the ice cover period.

scholarly journals Changeability of the Ice Cover on the Lakes of Northern Poland in the Light of Climatic Changes

2009 ◽  
Vol 1 (1) ◽  
pp. 103-123 ◽  
Author(s):  
Rajmund Skowron
Keyword(s):  
Twentieth Century ◽  
Air Temperature ◽  
Ice Cover ◽  
Climatic Changes ◽  
Ice Thickness ◽  
Northern Poland ◽  
Air Temperatures ◽  
Instrumental Observations ◽  
Indirect Indicator ◽  
Ice Regime

Abstract The study is based upon instrumental observations of ice covers which formed on the lakes in northern Poland in the period 1956-2005 and records of air temperature measured at 9 meteorological stations in the period 1960-2005. Relations between mean dates of ice cover freeze-up, ice cover duration, maximum ice thickness, and also other properties of ice regime indicate obvious dependency upon air temperatures in winter months (December-February). Both air temperatures and main properties of ice covers revealed definite trends, showing the increase in air temperature in winter (0.04-0.06°C year-1), earlier disappearance of ice cover (0.5-0.6 day year-1), its shorter duration (0.6-0.7 day year-1), and decreases in maximum thickness of the ice cover (0.2-0.25 cm year-1). The author shows considerable statistical relations between main properties of the course of the ice cover, air temperatures in winter and the NAO winter indexes. Therefore, changeability of the ice covers on the lakes in northern Poland in the latter half of the twentieth century may be treated as another proof and an indirect indicator of climatic changes undergoing in this part of Europe.

scholarly journals Determinants of change in the duration of ice phenomena on the Vistula River in Toruń

2015 ◽  
Vol 63 (2) ◽  
pp. 145-153 ◽  
Author(s):  
Bogusław Pawłowski
Keyword(s):  
Winter Season ◽  
Ice Cover ◽  
Anthropogenic Factors ◽  
River Engineering ◽  
Vistula River ◽  
Ice Regime ◽  
The City ◽  
Natural And Anthropogenic Factors ◽  
Ice Phenomena

Abstract Winter season temperatures are becoming warmer. However, the transformation of the ice regime on the Vistula River in Toruń has also been affected by river engineering. In particular, the construction and operation of the Włocławek Dam had a significant impact on ice processes. The article presents the results of an analysis determining the contribution of natural and anthropogenic factors to the duration of ice phenomena and ice cover on the Vistula River in the city of Toruń. Compared to the end of the nineteenth century, there has been a reduction in the duration of ice phenomena from 88 to 53 days and of ice cover from 40 to 7 days (in the period of 1882-2011). The article compares the duration of ice cover and winter temperature in three different periods: before the completion of river engineering works (1882-1907); for the controlled river (1908-1969), and for the controlled river with the Włocławek Dam upstream of Toruń (1970-2011). The results showed a significant role of these anthropogenic factors in the changes of the ice cover duration on the Vistula River in Toruń.

scholarly journals Ice Regime of the Kozłowa Góra Reservoir (Southern Poland) as an Indicator of Changes of the Thermal Conditions of Ambient Air

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2435 ◽  
Author(s):  
Maksymilian Solarski ◽  
Mariusz Rzętała
Keyword(s):  
Function Analysis ◽  
Thermal Conditions ◽  
Ambient Air ◽  
Ice Cover ◽  
Lake Ice ◽  
Research Problems ◽  
Components Analysis ◽  
Ice Regime ◽  
Ice Phenomena

Ice phenomena are construed as the occurrence of ice in water irrespective of its structure, form, and duration. One of the most frequently discussed research problems is the possibility of using long-term ice phenology as an indicator of changes of the thermal conditions of ambient air. The study used correlation analysis and regression models in order to determine changes in the parameters studied over time. In order to compare the ice regime of the study reservoir and other lakes in the region, discriminant function analysis, principal components analysis (PCA), and canonical redundancy analysis (RDA) were applied. During the 52 winter seasons studied (1964–2015), there were weak but still statistically significant trends concerning the increase in air temperature in the region (by 0.3 °C per decade), the reduction in the number of days with ice cover (by 8.6 days per decade) and the decline in the maximum and average thicknesses of lake ice (by 2.0 cm and 1.2 cm per decade). The low average depth and volume capacity are reflected in the rapid freezing rate of the reservoir, and its location results in a longer duration of ice cover, greater ice thickness, and later dates of its melting.

scholarly journals Variations of indicative dates of ice regime on Lake Onego based on ground air temperature

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Vyacheslav N. Baklagin
Keyword(s):  
Air Temperature ◽  
Regression Equations ◽  
Early Formation ◽  
Air Temperatures ◽  
Ice Regime ◽  
Break Up ◽  
Ice Period ◽  
Ice Phenomena

The paper shows the changes in the dates (complete freeze-up, ±5 days/°C and complete ice clearance, ±3 days/°C) of the ice regime in Lake Onego depending on changes in average air temperature within the preceding two-month periods (autumn and spring). The regression equations for their calculation based on previous three- and four-month periods according to the 2000-2018 data are also provided. Indicative dates of ice regime based on accumulated air temperatures within the ice period of Lake Onego were also established (early formation of ice phenomena, complete freeze-up phase, beginning of the break-up phase and complete ice clearance). Together with the data on expected air temperature above the lake’s surface, these dependencies enable us to predict the indicative dates of the ice regime.

scholarly journals Long-Term Variability in the Course of Ice Phenomena on the Vistula River in Toruń

2009 ◽  
Vol 1 (1) ◽  
pp. 91-102 ◽  
Author(s):  
Bogusław Pawłowski
Keyword(s):  
Water Management ◽  
Middle Ages ◽  
Ice Cover ◽  
Data Series ◽  
Vistula River ◽  
Winter Temperatures ◽  
Ice Regime ◽  
River Control ◽  
Ice Phenomena

Abstract Our first information of ice cover on the Vistula River in Poland dates from the Middle Ages. However, only since the 19th century have continuous observations been available. This study makes use of a data series, obtained mainly from IMGW (Institute of Meteorology and Water Management), covering the years 1861-2003 for ice phenomena and 1814-2003 for ice cover. Considerable shortening has been observed in the duration of both ice phenomena (from 60-120 days to 30-80 days) and ice cover (from 40-100 days to 20-60 days). These trends correspond well with the trend in winter temperatures becoming warmer. However, the transformation of the ice regime on the Vistula River in Toruń has also been affected by the river control, the construction and operation of the Włocławek Dam and (to a lesser degree than at Korzeniewo) icebreaking activities.

scholarly journals Natural and anthropogenic influences on ice formation on various water bodies of the Silesian Upland (southern Poland)

2011 ◽  
Vol 11 (1) ◽  
pp. 33-44 ◽  
Author(s):  
Maksymilian Solarski ◽  
Alicja Pradela ◽  
Mariusz Rzętała
Keyword(s):  
Winter Season ◽  
Field Measurements ◽  
Ice Cover ◽  
Water Bodies ◽  
Ice Formation ◽  
Anthropogenic Influences ◽  
Freezing And Thawing ◽  
Southern Poland ◽  
Great Danger ◽  
Ice Phenomena

Natural and anthropogenic influences on ice formation on various water bodies of the Silesian Upland (southern Poland)The aim of the study was to identify patterns of ice-related phenomena on 39 selected anthropogenic water bodies in the Silesian Upland in southern Poland. The core research was conducted in the winter season of 2009/2010, between December and March. Field measurements and observations were conducted every two days during the freezing and thawing phases and every four days at the time of continuous ice cover. Data were interpolated to cover days without observations. Differences in the ice cover phenology on these water bodies were caused by natural conditions (morphometric and hydro-meteorological) and human activity (thermal pollution). Two principal groups of anthropogenic water bodies were identified in terms of the ice phenomena: lakes and ponds with a natural or quasi-natural pattern of ice phenomena and water bodies featuring various degrees of human impact. The thickness of the ice-cover was found to vary, which was a source of great danger to the users of the water bodies in the winter season.

scholarly journals Changes in the course of ice phenomena on Morskie Oko in the Tatra Mountains from 1963 to 2012 and the implications for tourism

2018 ◽  
Vol 18 (4) ◽  
pp. 167-173 ◽  
Author(s):  
Bogusław Pawłowski
Keyword(s):  
Ice Cover ◽  
Practical Aspect ◽  
Reference Period ◽  
Detailed Data ◽  
Tatra Mountains ◽  
Ice Regime ◽  
The Tatra Mountains ◽  
Ice Phenomena

AbstractThe article presents changes in the course of ice phenomena on Lake Morskie Oko over 50 years. It comprises detailed data of the course of the main parameters of ice regime of the lake in the years 1963–1970. Such a reference period yielded substantial differences in the obtained values of trends in comparison with the period 1971–2010, which is most common in literature. The trends obtained differed substantially from those describing the years 1971–2010, and the change in the parameters – scaled to a year of the analysed period – was about half the size. Attention was also drawn to the practical aspect of the changes in the duration and thickness of ice cover on the lake. In the years 1963–2012 the period of safe movement on the frozen lake was reduced by only 10 days.

scholarly journals Effect of climatic changes on the development of the thermal-ice regime based on the example of Lake Charzykowskie (Poland)

2016 ◽  
Vol 11 (1) ◽  
pp. 27-33
Author(s):  
Bożena Pius ◽  
Włodzimierz Marszelewski
Keyword(s):  
Water Temperature ◽  
Air Temperature ◽  
Winter Season ◽  
Ice Cover ◽  
Climatic Changes ◽  
Central European ◽  
The Mean ◽  
Annual Water ◽  
Annual Water Temperature ◽  
Period Of Occurrence

Abstract The paper discusses the course of air temperature in the years 1961-2014 in Chojnice (Central European Lowland), and its effect on water temperature and occurrence of ice cover on Lake Charzykowskie. An increase in mean annual air temperature was determined by 0.31°C per 10 years, and its even faster increase in the winter season (December-March), by 0.37°C per 10 years on average. An increase in mean annual water temperature in the lake by 0.24°C per 10 years also occurred. An increase in air and water temperature in winter months caused a reduction of the period of occurrence of ice cover. In the years 1961-2014, the persistence of ice cover was subject to a decrease by 3.7 days per 10 years on average, and the mean thickness of the ice cover decreased from 30 to 19 cm.

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