By working with absolute values, this problem could be
alleviated. Therefore, the mean of the absolute value of pin change
(hereafter referred to as “mean|change|”), was calculated for every
measurement period and every morphological area by taking the average
of the absolute value of change for each pin in the group. This may
be a better statistic to capture the degree of change within each morphological
setting, as it helps to identify morphologies where both erosion
and deposition were significant but balanced, resulting in a mean
near zero. Mean erosion and mean deposition were calculated from
the subset of pins that experienced erosion and deposition, respectively,
for the study period.