An international science magazine “Science” published on 6 May 2005 an article “From dimming to brightening: decadal changes in solar radiation at Earth’s surface”.
10 scientists were authors of the article and among them there were two scientist from Estonia – Ms Viivi Russak from Tartu Observatory and Mr Ain Kallis, head specialist of Estonian Meteorological and Hydrological Institute.
Ms Russak had observed changes in solar radiatian in Estonia: amount of summative radiation was decreasing until 1990s, but now it is noticed to rise upward.
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