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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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Discussion papers
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: model description paper 15 Jul 2019

Submitted as: model description paper | 15 Jul 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Model Development (GMD).

HCLIM38: A flexible regional climate model applicable for different climate zones from coarse to convection permitting scales

Danijel Belušić1, Hylke de Vries2, Andreas Dobler3, Oskar Landgren3, Petter Lind1, David Lindstedt1, Rasmus A. Pedersen4, Juan Carlos Sánchez-Perrino5, Erika Toivonen6, Bert van Ulft2, Fuxing Wang1, Ulf Andrae1, Yurii Batrak3, Erik Kjellström1, Geert Lenderink2, Grigory Nikulin1, Joni-Pekka Pietikäinen6, Ernesto Rodríguez-Camino5, Patrick Samuelsson1, Erik van Meijgaard2, and Minchao Wu1 Danijel Belušić et al.
  • 1Swedish Meteorological and Hydrological Institute (SMHI), Norrköping, Sweden
  • 2Royal Netherlands Meteorological Institute (KNMI), De Bilt, the Netherlands
  • 3Norwegian Meteorological Institute (MET Norway), Oslo, Norway
  • 4Danish Meteorological Institute (DMI), Copenhagen, Denmark
  • 5Agencia Estatal de Meteorología (AEMET), Madrid, Spain
  • 6Finnish Meteorological Institute (FMI), Helsinki, Finland

Abstract. This paper presents a new version of HCLIM, a regional climate modelling system based on the ALADIN-HIRLAM numerical weather prediction (NWP) system. HCLIM uses atmospheric physics packages from three NWP model configurations, HARMONIE-AROME, ALARO and ALADIN, which are designed for use at different horizontal resolutions. The main focus of HCLIM is convection permitting climate modelling, i.e. developing the climate version of HARMONIE-AROME. In HCLIM, the ALADIN and ALARO physics packages are used for coarser resolutions where convection needs to be parameterized. Here we describe the structure, development and performance of the current recommended HCLIM version, cycle 38.

HCLIM38 is a new system for regional climate modelling and it is being used in a number of national and international projects over different domains and climates, ranging from equatorial to polar regions. Our initial evaluation indicates that HCLIM38 is applicable in different conditions and provides satisfactory results without additional region-specific tuning.

HCLIM is developed by a consortium of national meteorological institutes in close collaboration with the ALADIN-HIRLAM NWP model development. While the current HCLIM cycle has considerable differences in model setup compared to the NWP version (primarily in the description of the surface), it is planned for the next cycle release that the two versions will use a very similar setup. This will ensure a feasible and timely climate model development and updates in the future and provide evaluation of long-term model biases to both NWP and climate model developers.

Danijel Belušić et al.
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Status: final response (author comments only)
Status: final response (author comments only)
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Danijel Belušić et al.
Danijel Belušić et al.
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Publications Copernicus
Short summary
A new regional climate modelling system HCLIM38 is presented and shown to be applicable in different regions, ranging from the tropics to the Arctic. The main focus is on climate simulations at horizontal resolutions between 1 and 4 km, the so-called convection permitting scales, even though the model can also be used at coarser resolutions. The benefits of simulating climate at convection permitting scales are shown, and are particularly evident for climate extremes.
A new regional climate modelling system HCLIM38 is presented and shown to be applicable in...