Figure 2

Contour plots of daily averaged (A) dissolved oxygen (DO) and (B) temperature in OTM, with dots denoting dates on which daily averages were calculated at 1, 6, and 12 m. Breaks in the time-series represent periods of time where sensors were removed from the lake for data download and battery replacement. (C) Density contour plot with dots denoting the dates that salinity was collected and therefore the dates that density was calculated based on salinity and temperature. (D) Corresponding monthly mean ENSO Index (MEI) values. Months are noted at the bottom of the figure, from March 2016 to February 2017.