Improving the expected accuracy of forecasts of future climate using a simple bias-variance tradeoff

Details Improving the expected accuracy of forecasts of future climate using a simple bias-variance tradeoff Improving the expected accuracy of forecasts of future climate using a simple bias-variance tradeoff

2009-11-10

arxiv.org/abs/0911.1904v1

Physics

Atmospheric and Oceanic Physics

Scientific paper

We describe a simple method that utilises the standard idea of bias-variance trade-off to improve the expected accuracy of numerical model forecasts of future climate. The method can be thought of as an optimal multi-model combination between the forecast from a numerical model multi-model ensemble, on one hand, and a simple statistical forecast, on the other. We apply the method to predictions for UK temperature and precipitation for the period 2010 to 2100. The temperature predictions hardly change, while the precipitation predictions show large changes.

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