Explanations

Ratio of minimum salinity of the tide to mean salinity value of the tide.

left top: value of characteristic number for a single event.
left bottom: mean value of the characteristic number within the period of data analysis.
right top: maximum value of the characteristic number within the period of data analysis.
right bottom: minimum value of the characteristic number within the period of data analysis.

Examples

minimum salinity : mean salinity	minimum salinity : mean salinity (maximum)
ratio of minimum salinity : mean salinity of one specific tide	maximum value of ratio of minimum salinity : mean salinity within the period of data analysis

minimum salinity : mean salinity (mean)	minimum salinity : mean salinity (minimum)
mean value of ratio of minimum salinity : mean salinity within the period of data analysis	minimum value of ratio of minimum salinity : mean salinity within the period of data analysis