Using a nested single-model large ensemble to assess the internal variability of the North Atlantic Oscillation and its climatic implications for central Europe

Böhnisch, Andrea; Ludwig, Ralf; Leduc, Martin

doi:https://doi.org/10.5194/esd-11-617-2020

Articles | Volume 11, issue 3

https://doi.org/10.5194/esd-11-617-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Large Ensemble Climate Model Simulations: Exploring Natural...

https://doi.org/10.5194/esd-11-617-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 11, issue 3

Research article

|

23 Jul 2020

Research article |

| 23 Jul 2020

Using a nested single-model large ensemble to assess the internal variability of the North Atlantic Oscillation and its climatic implications for central Europe

Andrea Böhnisch, Ralf Ludwig, and Martin Leduc

Data sets

CRCM5-LE ClimEx Ouranos https://climex-data.srv.lrz.de/Public/

ERA-Interim European Centre for Medium-Range Weather Forecasts https://apps.ecmwf.int/datasets/data/interim-full-daily/levtype=sfc/

CanESM2 Large Ensembles Output Environment and Climate Change Canada https://open.canada.ca/data/en/dataset/aa7b6823-fd1e-49ff-a6fb-68076a4a477c

Short summary

North Atlantic air pressure variations influencing European climate variables are simulated in coarse-resolution global climate models (GCMs). As single-model runs do not sufficiently describe variations of their patterns, several model runs with slightly diverging initial conditions are analyzed. The study shows that GCM and regional climate model (RCM) patterns vary in a similar range over the same domain, while RCMs add consistent fine-scale information due to their higher spatial resolution.