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A regional climate model for northern Europe : Model description and results from the downscaling of two GCM control simulations

Rummukainen, M. LU orcid ; Räisänen, J. ; Bringfelt, B. ; Ullerstig, A. ; Omstedt, A. ; Willén, U. ; Hansson, U. and Jones, C. (2001) In Climate Dynamics 17(5-6). p.339-359
Abstract

This work presents a regional climate model, the Rossby Centre regional Atmospheric model (RCA1), recently developed from the High Resolution Limited Area Model (HIRLAM). The changes in the HIRLAM parametrizations, necessary for climate-length integrations, are described. A regional Baltic Sea ocean model and a modeling system for the Nordic inland lake systems have been coupled with RCA1. The coupled system has been used to downscale 10-year time slices from two different general circulation model (GCM) simulations to provide high-resolution regional interpretation of large-scale modeling. A selection of the results from the control runs, i.e. the present-day climate simulations, are presented: large-scale free atmospheric fields, the... (More)

This work presents a regional climate model, the Rossby Centre regional Atmospheric model (RCA1), recently developed from the High Resolution Limited Area Model (HIRLAM). The changes in the HIRLAM parametrizations, necessary for climate-length integrations, are described. A regional Baltic Sea ocean model and a modeling system for the Nordic inland lake systems have been coupled with RCA1. The coupled system has been used to downscale 10-year time slices from two different general circulation model (GCM) simulations to provide high-resolution regional interpretation of large-scale modeling. A selection of the results from the control runs, i.e. the present-day climate simulations, are presented: large-scale free atmospheric fields, the surface temperature and precipitation results and results for the on-line simulated regional ocean and lake surface climates. The regional model modifies the surface climate description compared to the GCM simulations, but it is also substantially affected by the biases in the GCM simulations. The regional model also improves the representation of the regional ocean and the inland lakes, compared to the GCM results.

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author
; ; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
in
Climate Dynamics
volume
17
issue
5-6
pages
21 pages
publisher
Springer
external identifiers
  • scopus:0034820203
ISSN
0930-7575
DOI
10.1007/s003820000109
language
English
LU publication?
no
id
031b8119-5e9f-4b12-b4ec-9f4cb30c9f5d
date added to LUP
2025-09-30 18:50:28
date last changed
2025-10-01 09:57:01
@article{031b8119-5e9f-4b12-b4ec-9f4cb30c9f5d,
  abstract     = {{<p>This work presents a regional climate model, the Rossby Centre regional Atmospheric model (RCA1), recently developed from the High Resolution Limited Area Model (HIRLAM). The changes in the HIRLAM parametrizations, necessary for climate-length integrations, are described. A regional Baltic Sea ocean model and a modeling system for the Nordic inland lake systems have been coupled with RCA1. The coupled system has been used to downscale 10-year time slices from two different general circulation model (GCM) simulations to provide high-resolution regional interpretation of large-scale modeling. A selection of the results from the control runs, i.e. the present-day climate simulations, are presented: large-scale free atmospheric fields, the surface temperature and precipitation results and results for the on-line simulated regional ocean and lake surface climates. The regional model modifies the surface climate description compared to the GCM simulations, but it is also substantially affected by the biases in the GCM simulations. The regional model also improves the representation of the regional ocean and the inland lakes, compared to the GCM results.</p>}},
  author       = {{Rummukainen, M. and Räisänen, J. and Bringfelt, B. and Ullerstig, A. and Omstedt, A. and Willén, U. and Hansson, U. and Jones, C.}},
  issn         = {{0930-7575}},
  language     = {{eng}},
  number       = {{5-6}},
  pages        = {{339--359}},
  publisher    = {{Springer}},
  series       = {{Climate Dynamics}},
  title        = {{A regional climate model for northern Europe : Model description and results from the downscaling of two GCM control simulations}},
  url          = {{http://dx.doi.org/10.1007/s003820000109}},
  doi          = {{10.1007/s003820000109}},
  volume       = {{17}},
  year         = {{2001}},
}