Journal
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
Volume 7, Issue 3, Pages 963-986Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015MS000431
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Funding
- German Federal Ministry of Education and Research (BMBF) [01LK1202E]
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ICON (ICOsahedral Nonhydrostatic) is a unified modeling system for global numerical weather prediction (NWP) and climate studies. Validation of its dynamical core against a test suite for numerical weather forecasting has been recently published by Zangl et al. (2014). In the present work, an extension of ICON is presented that enables it to perform as a large eddy simulation (LES) model. The details of the implementation of the LES turbulence scheme in ICON are explained and test cases are performed to validate it against two standard LES models. Despite the limitations that ICON inherits from being a unified modeling system, it performs well in capturing the mean flow characteristics and the turbulent statistics of two simulated flow configurationsone being a dry convective boundary layer and the other a cumulus-topped planetary boundary layer.
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