Ideas for displaying spatial outputs to reduce the need for multiple maps of a single variable

Display methods

Trainee: Would you agree that a concise and meaningful way of displaying change in mean temp and annual precipitation would be to provide:

a) A baseline map (scenario generator) showing the climate variable across the area of interest.

b) A map of percentage change/degree change per degree of global warming (climate scenario).

c) On the map in b. above – display in the legend the percentage change/degree change for both 2030, 2050 and 2070 (as a percentage/degrees and as an absolute value), as the colours show the spatial variation and the numbers give the actual change.

CLIMsystems Answer:        

a) A baseline map is very useful: mention the period over which the baseline was established (1981-2010) and the baseline year (1995, the "midpoint").

b) This is a way to focus on the spatial variability, regardless of the projection year, RCP or climate sensitivity; this would need a clear explanation to the client (we rarely do this in a report, just show spatial images (with synced legends) for selected years and RCP/climate sensitivity - but you can definitely do this).

c) This is a great way to show the differences between the scenarios/years.

(b) + (c) are a novel way to present this information, and we think it is a good one!