Skip to main content
Fig. 3 | Climatic Change

Fig. 3

From: Substantial increase in minimum lake surface temperatures under climate change

Fig. 3

Comparison of the calculated annual minimum lake surface water temperature from the observed data (as shown in Fig. 1) with those calculated from a time series whereby the sampling frequency was reduced from daily to 21 days at 1-day increments. Shown are a, c the inter-annual variability in the annual minimum observed and down-sampled lake surface water temperature time series and b, d the calculated rate of change in minimum lake surface temperature from 1973 to 2014. In b and d, the solid black horizontal line represents the calculated rate of change from the observed annual minimum temperature, and the dashed lines represent the 95% confidence interval (Table 1). Note that a sampling resolution of 1-day is equal to the raw daily data. Lake temperatures are shown only for lakes with daily lake surface temperature observations: a, b Feeagh, Ireland, and c, d Wörthersee, Austria. The grey lines in b and d show the computed correlation coefficients (r2) between the observed annual minimum lake surface water temperature and that calculated from the down-sampled time series (as shown in a and c)

Back to article page