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Automated ice station Lotus was deployed in the lake for measurements during the ice seasons (Table 1). The data include atmospheric surface layer (temperature, humidity, wind speed and direction, solar radiation), snow and ice cover (radiative surface temperature, snow depth, vertical temperature distribution, attenuation of sunlight), and lake water body beneath the ice (temperature, electric conductivity, sunlight, current velocity).

Table 1

Instrumentation of the ice station in the study winters

 2007–20082008–2009
Location 69 °03.344′N 20 °46.445′E 69 °03.360′N 20 °46.378′E 
Period 14 Dec–12 Jun 9 Sep–21 May 
Radiation Solar in & out, net Solar in & out, net 
Temperature Surface, 3.1 m Surface, 2.9 m 
Humidity 3.1 m 2.9 m 
Wind 3.2 m 3.2 m 
Other Snow depth, air pressure Snow depth, air pressure 
 2007–20082008–2009
Location 69 °03.344′N 20 °46.445′E 69 °03.360′N 20 °46.378′E 
Period 14 Dec–12 Jun 9 Sep–21 May 
Radiation Solar in & out, net Solar in & out, net 
Temperature Surface, 3.1 m Surface, 2.9 m 
Humidity 3.1 m 2.9 m 
Wind 3.2 m 3.2 m 
Other Snow depth, air pressure Snow depth, air pressure 

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