The year has been changed, due to the sensitive nature of the dataset. The years have been changed in the same manner as the detection dates, so the ice-free dates correspond to the dataset in the same way as the original dataset.
data(seasons)A data frame with 5 rows (years) and 2 variables.
The variables are as follows:
Start. The date of ice break-up (the start of the period of interest).
End. The date of ice freeze-up (the end of the period of interest).