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RCA - Rossby Centre regional Atmospheric climate model: model description and results from the first multi-year simulation
SMHI, Research Department, Climate research - Rossby Centre.ORCID iD: 0000-0001-5709-9804
SMHI, Research Department, Climate research - Rossby Centre.
SMHI, Research Department, Climate research - Rossby Centre.
SMHI.
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1997 (English)Report (Other academic)
Abstract [en]

The first version of the Rossby Centre regional climate model (RCA) has now been developed. The RCA model is based on a parallel coding of the operational weather forecast model HIRLAM. Some modifications have been done on the model formulation, especially in its surface/snow/soil scheme, in an attempt to include the regional and local scale climate-modifying forcing up to time scales of several years. The physical parameterization choices in HIRLAM and in RCA are discussed in some detail. One of the notable features in RCA is that the regional sea ice climate, as well as ice on the numerous lakes in the region, has been included in a crude, but time-efficient fashion. It appears that realistic modeling of the sea/lake ice is most important for modeling the regional climate in the Nordic region.

The RCA model has been run fora ten-year period, focusing on the Nordic region, using results from a coupled ocean-atmosphere general circulation model. In this first multi-year simulation, the regional resolution was 44 km.  Several results are illustrated from this regional simulation and they are compared to the driving global model data, to analyzed observations and to Swedish station data for the 1961-90 period. The apparent model development needs are also discussed briefly.

Place, publisher, year, edition, pages
SMHI , 1997. , p. 76
Series
RMK: Report Meteorology and Climatology, ISSN 0347-2116 ; 83
Keywords [en]
Dynamical downscaling, regional climate modeling, model parameterizations
National Category
Meteorology and Atmospheric Sciences
Research subject
Meteorology; Climate
Identifiers
URN: urn:nbn:se:smhi:diva-2600Local ID: Meteorologi, Rapporter, Serie RMKOAI: oai:DiVA.org:smhi-2600DiVA, id: diva2:947894
Available from: 1997-05-19 Created: 2016-07-08 Last updated: 2020-04-01Bibliographically approved

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Rummukainen, MarkkuHansson, UlfGraham, Phil

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CiteExportLink to record
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Citation style
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