one knows exactly how the procedures have changed. The information was reported annually, although ice-on dates are missing and uncertain during the middle of the record. For example, the years between 1682 and 1896 are uncertain because of changes in the calendar from lunar to Gregorian and ...
Modeled (a) epilimnion temperature; (b) hypolimnion temperature; (c) epilimnion temperature variability; (d) hypolimnion temperature variability; (e) calendar days with a 2 ◦C/m thermocline; (f) depth of thermocline; (g) duration of thermocline in days; and (h) thermocline duration ...