Figure 9: Sustained evaporation events, defined as consecutive days with at least 3.5 mm of daily evaporation. (a) Number of occurrences per month: A (August), S (September), O (October), N (November), D (December); and (b) number of occurrences for different durations.
Figure 10 presents several variable time series during two strong evaporative events. These episodes occur when air becomes drier (decline of at least 50% of the specific humidity) in conjunction with high wind speeds. This may be due to the passage of a low pressure system (Figure 10, left) or a high pressure system (Figure 10, right).