Forecast skill of multi-year seasonal means in the decadal prediction system of the Max Planck Institute for Meteorology
Article first published online: 30 NOV 2012
©2012. American Geophysical Union. All Rights Reserved.
Geophysical Research Letters
Volume 39, Issue 22, 28 November 2012
How to Cite
2012), Forecast skill of multi-year seasonal means in the decadal prediction system of the Max Planck Institute for Meteorology, Geophys. Res. Lett., 39, L22707, doi:10.1029/2012GL053326., , , , , , , , , and (
- Issue published online: 30 NOV 2012
- Article first published online: 30 NOV 2012
- Manuscript Accepted: 21 OCT 2012
- Manuscript Revised: 19 OCT 2012
- Manuscript Received: 31 JUL 2012
- decadal prediction;
- seasonal means;
- skill scores
 We examine the latest decadal predictions performed with the coupled model MPI-ESM as part of the Coupled Model Intercomparison Project Phase 5 (CMIP5). We use ensembles of uninitialized and yearly initialized experiments to estimate the forecast skill for surface air temperature. Like for its precursor, the initialization of MPI-ESM improves forecast skill for yearly and multi-yearly means, predominately over the North Atlantic for all lead times. Over the tropical Pacific, negative skill scores reflect a systematic error in the initialization. We also examine the forecast skill of multi-year seasonal means. Skill scores of winter means are predominantly positive over northern Europe. In contrast, summer to autumn means reveal positive skill scores over central and south-eastern Europe. The skill scores of summer means are attributable to an observed pressure-gradient response to the North Atlantic surface temperatures.