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Global high resolution versus Limited Area Model climate change projections over Europe: quantifying confidence level from PRUDENCE results
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2005 (Engelska)Ingår i: Climate Dynamics, ISSN 0930-7575, E-ISSN 1432-0894, Vol. 25, nr 6, s. 653-670Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Four high resolution atmospheric general circulation models (GCMs) have been integrated with the standard forcings of the PRUDENCE experiment: IPCC-SRES A2 radiative forcing and Hadley Centre sea surface temperature and sea-ice extent. The response over Europe, calculated as the difference between the 2071-2100 and the 1961-1990 means is compared with the same diagnostic obtained with nine Regional Climate Models (RCM) all driven by the Hadley Centre atmospheric GCM. The seasonal mean response for 2m temperature and precipitation is investigated. For temperature, GCMs and RCMs behave similarly, except that GCMs exhibit a larger spread. However, during summer, the spread of the RCMs-in particular in terms of precipitation-is larger than that of the GCMs. This indicates that the European summer climate is strongly controlled by parameterized physics and/or high-resolution processes. The temperature response is larger than the systematic error. The situation is different for precipitation. The model bias is twice as large as the climate response. The confidence in PRUDENCE results comes from the fact that the models have a similar response to the IPCC-SRES A2 forcing, whereas their systematic errors are more spread. In addition, GCM precipitation response is slightly but significantly different from that of the RCMs.

Ort, förlag, år, upplaga, sidor
2005. Vol. 25, nr 6, s. 653-670
Nationell ämneskategori
Klimatforskning
Forskningsämne
Klimat
Identifikatorer
URN: urn:nbn:se:smhi:diva-1264DOI: 10.1007/s00382-005-0052-1ISI: 000233042200006OAI: oai:DiVA.org:smhi-1264DiVA, id: diva2:843236
Tillgänglig från: 2015-07-28 Skapad: 2015-05-26 Senast uppdaterad: 2017-12-04Bibliografiskt granskad

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Kjellström, Erik

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