Regionally coupled modelling of the Tropical Atlantic


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dmitry.sein [ at ] awi.de

Abstract

Currently, Global Coupled Models (GCMs) have difficulty capturing key phenomena and achieving accurate climate projections on regional and local scales because limitations in computer po wer do not allow them to reach the necessary horizontal resolutions. Regional climate models (RCMs) provide dynamically downscaled climate information within the region of interest, improving this drawback of current GCMs. At this point, naturally raises the question of how much, if any, the RCM can improve the GCMs results. It has been argued that regional models can reproduce an observed climatology but are not able to predict the change of the climatology in response to a changing climate (e.g. Kerr, 2013). However, Feser et al. (2011) could demonstrate an added value in those parameters that exhibit high spatial variability such as near surf ace temperature in different regional atmospheric models. They show that the added value originates mainly from the higher resolved orography in the regional models.



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Peer-reviewed
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Eprint ID
37322
Cite as
Sein, D. , Cabos, W. and Jacob, D. (2014): Regionally coupled modelling of the Tropical Atlantic / L. Bärring , M. Reckermann , B. Rockel and M. Rummukainen (editors) , In: 3rd International Lund Regional-Scale Climate Modelling Workshop 21st Century Challenges in Regional Climate Modelling: Workshop proceedings, Lund, Sweden, 16-19 June 2014, (International Baltic Earth Secretariat Publications ; 3), Geesthacht, International Baltic Earth Secretariat Publications, 434 p. .


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