The selectors on the left-hand side determine what is displayed on the map. They are intended to read as an English sentence of the form "Display <observation variable> <value type> for <period>." A couple of examples of this sentence:
- Display Tmin Anomaly for Jun 2020.
- Display Precipitation Baseline for Feb.
Selectors
Variable: To select the observation variable, click on one of the three buttons labelled Precipitation, Tmin, or Tmax. The selected button is highlighted.
Value type: To select the value type shown, click on one of the three buttons labelled Anomaly, Monthly, or Baseline.
Month: To select the period month, click or drag the top slider to the desired month.
- To decrement or increment the month selected, click the -N or +N button below the month slider. (N here is the number of months by which to change the selection. The default is 1 month, so the buttons are labelled -1 and +1.)
- To change the increment, use the drop-down between the buttons.
- These buttons can be useful to step uniformly through the months available while looking at the map.
- Note that decrementing or incrementing the month carries across year boundaries. For example, incrementing +1 from Dec 2020 changes the selection to Jan 2021.
Year: To select the period year, click or drag the top slider to the desired year.
- To decrement or increment the year selected, click the -N or +N button below the year slider. (N here is the number of years by which to change the selection. The default is 1 year, so the buttons are labelled -1 and +1.)
- To change the increment, use the drop-down between the buttons.
- These buttons can be useful to step uniformly through the years available while looking at the map.