Fig. 6: Day-to-night changes of the sea spray aerosol number concentration with optical diameters (Dop) ≥ 0.58 μm (NSSA ≥ 0.58 µm) and the rate of change of γ (∂γ/∂t (hr−1)).

A Box plot analysis of the 282 days with the 24-h cycle in the Pacific Ocean shows the compelling statistical significance of the day and night counts. B Box plot analysis of the γ rate of change (vertical axis inverted) for the 167 days (near the Pacific islands, Japan, and Taiwan there is no data). Statistically significant day to night variation is readily discernible. The box plots show the median, and the 5th, 25th, 75th, and 95th percentiles; the orange line is the mean. N refers to the number of days analyzed.