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).