This option allows you to restrict the computations to a specific season. Many effects vary greatly with the seasonal cycle, and it is rarely a good idea to combine all seasons.

In the Climate Explorer, the season is defined by a starting month and the length of the season. The starting month is

• all: separate months, this gives 12 results (not always present), or
• a single calendar month (each January, February, ...), or
• together: all months together, giving a single result.

The length of the season is defined by selecting the number of months in the season (1 to 12). If you want to subtract the seasonal cycle to first order, check the box anomalies.

Note that if you have also requested averaging the data, the season refers to the first day of the averaging period.

• To compute a property of all December days, set the starting month to [December] and select [1] month.
• To compute a property of all winter days in the Netherlands, set the starting month to [December] and select [3] months. This will select all days in December, January or February. If you have also asked for 10-day averages, the last data point will refer to the averages of Feb 28/29 to Mar 9.