Search site

What to use them for

The Spatially Coherent Projections (SCPs) are useful for a number of different applications. You may want to use the SCPs to:

1. Take into account more of the UKCP09 probabilistic range than the 11-member RCMs offer

The SCPs have been generated by applying scaling factors to the 11-member RCM data. This has been done so that the changes in the SCP ensemble are linearly related to change in global temperature. This better reflects the changes in global temperature and is more consistent with the wider set of uncertainties explored by UKCP09.

Therefore, although the SCPs under-sample the range of uncertainty available through the UKCP09 probabilistic projections, they do explore a wider range of climate change than the 11-member RCM ensemble. The SCPs could be used for a preliminary study of climate change impacts prior to a more in-depth study using the probabilistic projections.

2. Perform studies that require information from more than one grid square in a spatially coherent way

Unlike the UKCP09 probabilistic projections, the SCPs allow you to model impacts that fall over a number of neighbouring grid squares. This is useful if you need to perform studies such as modelling flow in river catchments. They are also spatially coherent. This means that the projections for one grid square can be averaged with those from adjacent grid squares. You can therefore explore projections for your own, customised land area.

3. Undertake studies that require information for wind in combination with other variables

The SCPs provide projections for wind alongside the other climate variables. If you want to do an analysis using projections for wind in combination with other climate variables you should use either the SCPs or the 11-member RCM projections.