Long-term characteristics of ice phenology in Karelian lakes

• Published in: Estonian Journal of Earth Sciences
• Main Authors: Tatiana Efremova, Nikolay Palshin, Roman Zdorovennov
• Format: Article in Journal/Newspaper
• Language: English
• Published: Estonian Academy Publishers 2013
• Subjects: long-term data; lakes; ice phenology; climate change; Geology; QE1-996.5; karelia*; karelian; North Atlantic; North Atlantic oscillation
• Online Access: https://doi.org/10.3176/earth.2013.04; https://doaj.org/article/ae96404cf0c84a9e9c0ee56759e405c1

The statistical relationships between lake ice phenology (freeze and break-up dates, ice duration), air temperature and North Atlantic Oscillation (NAO) index are analysed for eight lakes in Karelia from 1950 to 2009. Linear trends over this time period are estimated. It is shown that in the last 20 years trends in the timing of ice phenomena are more evident than in the entire 60-year period. The statistical relationship between lake ice phenology and variability of regional air temperature is used in the empirical model to assess ice-related events on previously unstudied lakes in NW Russia.