# Mathematical Digest

### Short Summaries of Articles about Mathematics

in the Popular Press

"Possible or probable?," by Myles R. Allen. *Nature*, 18 September 2003, page242.

Uncertainty in climate models results in a range of possible outcomes thatcan't all be planned for. The climate-research community is attempting toassign probabilities to climate forecasting so that preparations can be madefor the more realistic scenarios. Toward that end, the community wants toassemble information from the simulations of various models. Care must betaken when searching for a representative sample of models because models canbe very similar. Also the models often operate on the same data set so thatassigning weights to the selected models isn't a straightforward processeither. So many climate simulations are needed that climate researchers arenow using idle desktop processing time (information here).

*--- Mike Breen*