Editorial On Thin Ice An unusual thing happened during this past weekend’s severe cold snap: Between 6:30 p.m. on Friday and 8 a.m. Saturday, Otsego Lake, the largest lake in Otsego County, froze over completely. With this week’s warmer weather forecast, it may well thaw again and, if it does, it will follow a somewhat disturbing trend that could spell trouble in the years ahead. Records of ice cover on Otsego Lake have been kept since 1842 and, with the establishment of the SUNY Biological Field Station on the Lake in 1968, extensive research and record-keeping on all aspects of…