Long-term trends in water temperature and ice cover in the subalpine lake, Øvre Heimdalsvatn, and nearby lakes and rivers

2010 ◽  
pp. 47-60
Author(s):  
Ånund Sigurd Kvambekk ◽  
Kjetil Melvold
Keyword(s):  
Water Temperature ◽  
Ice Cover ◽  
Subalpine Lake ◽  
Long Term Trends

Parameterization of surface water temperature and long-term trends in Europe’s fourth largest lake shows recent and rapid warming in winter

Limnologica ◽  
2020 ◽  
Vol 82 ◽  
pp. 125777 ◽  
Author(s):  
Burak Öğlü ◽  
Tõnu Möls ◽  
Tanel Kaart ◽  
Fabien Cremona ◽  
Külli Kangur
Keyword(s):  
Surface Water ◽  
Water Temperature ◽  
Surface Water Temperature ◽  
Long Term Trends

scholarly journals Irregular changes in lake surface water temperature and ice cover in subalpine Lake Lunz, Austria

Inland Waters ◽  
2017 ◽  
Vol 7 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Martin J. Kainz ◽  
Robert Ptacnik ◽  
Serena Rasconi ◽  
Hannes H. Hager
Keyword(s):  
Surface Water ◽  
Water Temperature ◽  
Ice Cover ◽  
Surface Water Temperature ◽  
Lake Surface ◽  
Subalpine Lake

Long-term lake water temperature and ice cover simulations/measurements

1996 ◽  
Vol 24 (3) ◽  
pp. 289-304 ◽  
Author(s):  
Xing Fang ◽  
Heinz G. Stefan
Keyword(s):  
Water Temperature ◽  
Lake Water ◽  
Ice Cover

Trends and Characteristics of Hydrological Time Series in Finland

2003 ◽  
Vol 34 (1-2) ◽  
pp. 71-90 ◽  
Author(s):  
Veli Hyvärinen
Keyword(s):  
Time Series ◽  
Water Temperature ◽  
The South ◽  
Lake Ice ◽  
The North ◽  
Long Term Trends ◽  
Time Series Analyses ◽  
Water Stage ◽  
In The Beginning

Hydrological time series analyses made in Finland up to 2001 show the following: 1) Precipitation has been increasing in southern and central Finland, and also in the north in winter, during the period 1911-2000. There are, however, no harmonized analyses of areal precipitation to show the exact increase. 2) The annual maximum of the areal water equivalent of snow has been increasing in eastern and northern Finland but decreasing in the south and west during the period 1947-2001. 3) The winter runoff has generally been increasing strongly in southern and slightly in central Finland during the 20th century. In northern Lapland there are no signs of increase in winter or annual flow. Annual discharge in the south and west has also increased to some extent. 4) The existing analyses show no signs of long-term trends in annual evapotranspiration. 5) Long-term fluctuations of water stage have been observed in the major groundwater formations. 6) The series of the date of ice break-up in the river Tornionjoki - starting in 1693 – shows that in recent decades the ice cover of the river has broken up about two weeks earlier than in the beginning of the period. 6) Lake ice maximum thickness series show no noticeable trend. 7) Lake water temperature in south-eastern Finland seems to have been increasing slightly during the period starting in 1924; in central and northern Finland no trends in water temperature have been observed.

scholarly journals Effect of climate warming on a change in thermal and ice conditions in the largest lake in Poland – Lake Śniardwy

2020 ◽  
Vol 68 (3) ◽  
pp. 260-270 ◽  
Author(s):  
Mariusz Ptak ◽  
Mariusz Sojka ◽  
Bogumił Nowak
Keyword(s):  
Water Temperature ◽  
Air Temperature ◽  
Ice Cover ◽  
Considerable Change ◽  
Pettitt Test ◽  
Ice Conditions ◽  
Ice Regime ◽  
Annual Water ◽  
Annual Water Temperature

AbstractLake Śniardwy is the largest among more than 7000 Polish lakes. So far, it has not been a subject of detailed investigations concerning long-term changes in water temperature or ice regime. A considerable change in thermal and ice conditions has been observed in the period 1972–2019. Mean annual water temperature increased by 0.44°C dec−1 on average, and was higher than an increase in air temperature (0.33°C dec−1). In the monthly cycle, the most dynamic changes occurred in April (0.77°C dec−1). In the case of ice cover, it appeared increasingly later (5.3 days dec−1), and disappeared earlier (3.0 days dec−1). The thickness of ice cover also decreased (2.4 cm dec−1). Statistical analysis by means of a Pettitt test showed that the critical moment for the transformations of the thermal and ice regime was the end of the 1980’s. In addition to the obvious relations with air temperature for both characteristics, it was evidenced that the occurrence of ice cover depended on wind speed and snow cover. The recorded changes in the case of Lake Śniardwy are considered unfavourable, and their consequences will affect the course of physical, chemical, and biological processes in the largest lake in Poland.

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