scholarly journals The statistical relation/coherence between ice-regimes of Lake Raduńskie Górne and Lake Ostrzyckie

2018 ◽  
Vol 18 (3) ◽  
pp. 103-108
Author(s):  
Jacek Barańczuk
Keyword(s):  
Water Management ◽  
Statistical Models ◽  
Ice Cover ◽  
Empirical Models ◽  
The Other ◽  
Statistical Relation ◽  
Ice Regime ◽  
The University ◽  
Ice Phenomena ◽  
Cover Pattern

AbstractThis article is an attempt to analyse and compare several selected parameters regarding ice phenomena using the correlation analysis of two lakes, which are benchmark lakes located in the central part of the Kashubian Lakeland. These lakes are: Raduńskie Górne, a larger one (387.2 hm2) and Ostrzyckie, a smaller one covering an area of 308.0 hm2. The analysis covered measurement sequences for the period 1971–2010. The material for analysis regarding data on ice phenomena on Lake Raduńskie Górne was obtained from the University of Gdańsk Limnological Station in Borucino while the data for Lake Ostrzyckie was obtained from the Institute of Meteorology and Water Management (IMGW). Relations between the following parameters of the ice regime were analysed: duration of the ice phenomena, duration of the ice cover, average and maximum thickness of the ice cover. The analysis and data comparisons have revealed that there are strong and very strong relations between the analysed parameters, which made it possible to develop proper statistical models. Hence, should there be a lack of data on the ice-cover pattern for one of these lakes it is possible to recreate them using the elaborated empirical models and data for the other.

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 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 Analysis of ice phenomena hazard on the middle Odra river

2017 ◽  
Vol 49 (4) ◽  
pp. 301-314 ◽  
Author(s):  
Krzysztof Wolski ◽  
Tomasz Tymiński ◽  
Beata Głuchowska
Keyword(s):  
Water Management ◽  
Cross Sections ◽  
Reference Data ◽  
Life Sciences ◽  
Ice Cover ◽  
Frazil Ice ◽  
Ice Jam ◽  
Odra River ◽  
Regional Water ◽  
Ice Phenomena

Abstract The paper contains analysis of ice phenomena occurrence in the light of recent observations conducted on middle Odra river from Krapkowice (ca. km 125+000) to Krosno Odrzańskie (ca. km 530+000). In detail the research embraced time of occurrence and intensity of individual ice phenomena in years 2006–2017 together with reference and comparison of data to previous data from period 1957–2005. In characteristic cross-sections there is a reference to occurrence of all observed forms of ice phenomena (frazil ice, border ice, ice cover, floe and ice-jam). In the study a reference data of Regional Water Management Authority in Wrocław were used together with results of previous research conducted at the Wrocław University of Environmental and Life Sciences. The results legitimized, that the occurrence of ice phenomena on middle Odra river has time of its appearance, duration and intensity and is not stable in every year. Occurrence of ice phenomena on middle Odra river varies in time, being observed as manifold forms of icing – most frequently border ice and frazil ice. During the last 12 years greater than the average number of days with ice phenomena occurrence can be observed, but these phenomena have definitely “milder” character (border ice).

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 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 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 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 Ice phenomena on Lake Wielki Staw in the Valley of Five Polish Lakes

2017 ◽  
Vol 17 (2) ◽  
pp. 71-77 ◽  
Author(s):  
Adam Choiński
Keyword(s):  
Water Management ◽  
Ice Cover ◽  
Close Vicinity ◽  
The Mean ◽  
Ice Phenomena

AbstractThe paper presents an analysis of the ice phenomena on Lake Wielki Staw in the Valley of Five Polish Lakes based on observations of the Institute of Meteorology and Water Management conducted in the years 1971–1979. The dates of commencement and decline of ice phenomena and ice cover and their persistence were determined. For 1978 and 1979, changes in the ice cover were determined, i.e. from development to decline. Due to the close vicinity of Lake Morskie Oko, comparisons were performed in terms of variability of ice phenomena of both of the lakes. The study showed among others that although Lake Wielki Staw is located higher than Lake Morskie Oko by approximately 270 m, ice phenomena on the lake appear on the average 10 days later than in Lake Morskie Oko, and the mean persistence of the ice cover is the same, i.e. it amounts to 167 days.

Industrial Technology Graduates’ Acquired Skills and Competencies from the University

2019 ◽  
Vol 5 (3) ◽  
pp. 189
Author(s):  
Amado C Gequinto ◽  
Do Mads
Keyword(s):  
Social Media ◽  
Text Messaging ◽  
Global Market ◽  
The Other ◽  
Global Markets ◽  
Industrial Technology ◽  
The University ◽  
Descriptive Method

Skills and competencies are highly regarded in todays global market. Different agencies specifically those seeking for  technologists, technicians, and engineers, have stressed out that skills and competencies as major components  for individual workers.  This aimed to determine  the relevance and appropriateness of acquired skills and competencies by industrial technology graduates, and determine the extent of use of skills and competencies in the current employment. Review of related literatures and studies have been considered in the realization, understanding, analysis, and interpretation of this research exploration. A descriptive method of research was used with 78 graduates from 2015-2016 and 117 graduates from 2016-2017, who participated in the study survey process. The BatStateU Standardized Questionnaire was used to gather data. A brief interview and talk during the visit of alumni in the university was also considered, as well as the other means of social media like email, facebook, messenger, and text messaging.   Results show that skills and competecnices acquired by industrial technology graduates are all relevant and appropriate.  The study also found that there is some to great extent use of acquired skills and competencies to their current employment. The study implies that the acquired skills and competencies from the university significantly provided the graduates the opportunities ins the national and global markets and industries.

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