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Evaluation of regional cloud climate simulations over Scandinavia using a 10-year NOAA advanced very high resolution radiometer cloud climatology
SMHI, Forskningsavdelningen, Atmosfärisk fjärranalys.ORCID-id: 0000-0001-8256-0228
SMHI, Forskningsavdelningen, Klimatforskning - Rossby Centre.
SMHI, Forskningsavdelningen, Klimatforskning - Rossby Centre.
SMHI, Forskningsavdelningen, Klimatforskning - Rossby Centre.ORCID-id: 0000-0001-9752-3454
2008 (Engelska)Ingår i: Journal of Geophysical Research - Atmospheres, ISSN 2169-897X, E-ISSN 2169-8996, Vol. 113, nr D1, artikel-id D01203Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A satellite-derived (NOAA Advanced Very High Resolution Radiometer) cloud climatology over the Scandinavian region covering the period 1991 - 2001 has been used to evaluate the performance of cloud simulations of the Swedish Meteorological and Hydrological Institute Rossby Centre regional climate model (RCA3). Several methods of adapting the satellite and model data sets to allow a meaningful comparison were applied. RCA3-simulated total cloud cover was shown to agree within a few percent of the satellite-retrieved cloud amounts on seasonal and annual timescales. However, a substantial imbalance between the respective RCA3 contributions from low-, medium- and high-level clouds was seen. The differences from satellite-derived contributions were +2.4% for high-level clouds, -5.2% for medium-level clouds and +4.0% for low- level clouds. In addition, an overrepresentation of cloud categories with high optical thicknesses was seen for all vertical cloud groups, particularly during the summer season. Some specific features of the geographical distribution of cloudiness were also noticed. Most pronounced were the excess of cloud amounts over the Scandinavian mountain range and a deficit leeward of the mountains. The overall results imply problems with the RCA3-modeled surface radiation budget components by causing reduced incoming solar radiation and increased downwelling longwave radiation.

Ort, förlag, år, upplaga, sidor
2008. Vol. 113, nr D1, artikel-id D01203
Nationell ämneskategori
Klimatforskning
Forskningsämne
Klimat
Identifikatorer
URN: urn:nbn:se:smhi:diva-1128DOI: 10.1029/2007JD008658ISI: 000252362400003OAI: oai:DiVA.org:smhi-1128DiVA, id: diva2:813780
Tillgänglig från: 2015-05-25 Skapad: 2015-05-25 Senast uppdaterad: 2017-12-04Bibliografiskt granskad

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Karlsson, Karl-GöranWillen, UlrikaJones, ColinWyser, Klaus

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Karlsson, Karl-GöranWillen, UlrikaJones, ColinWyser, Klaus
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Atmosfärisk fjärranalysKlimatforskning - Rossby Centre
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Journal of Geophysical Research - Atmospheres
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