VARIABLE

In the VARIABLE sub-menu there are three selections that can be made: Actual or Change; which variable to display; and which month or season to choose. Click on the first arrow to alter the variable selection. The user will be given a choice of three variables if viewing globally (mean temperature, precipitation and cloud cover) and eight variables if viewing regionally (mean temperature, precipitation, cloud cover, maximum and minimum temperature, diurnal temperature range, wind speed and vapour pressure). After a selection is made the screens return to the Variable sub-menu.

IMPORTANTwhen you change variable, there are implications for your choice of GCMs. Not all GCMs have all variables available. It is advised that you re-enter 'Select GCMs' after you change variable to make sure you are still happy with the selection of GCMs. If your variable selection forces a different sub-set of GCMs to be chosen, SCENGEN will 'beep' to warn you.

To select which month or season to view click on the second arrow and the 12 months, four seasons and annual will be listed on a pull-down menu for selection. The selected month or season will now be displayed in the panel.

The selections made in the Variable sub-menu may be altered at any stage in SCENGEN, although each time a selection is changed the image must be recreated by selecting View Map.