Table 3.

Differences in extreme events among pH zones

	pH Zone
Statistic	Ambient	Low	Extreme low
North
Number of extreme events per week	0	7.5	24.8
Mean duration (h)	—	1.6	2.3
Maximum duration (h)	—	4	16
Time series (d)	25	25	25
South
Number of extreme events per week	0.9	6.3	12.8
Mean duration (h)	1.4	2.9	2.9
Maximum duration (h)	2	15	12
Time series (d)	62	69	90

Time series from separate pH sensor deployments within a pH zone (Table 1) were combined to calculate extreme events.