Publication Abstracts

Hannah et al. 2022

Hannah, W.M., K.G. Pressel, M. Ovchinnikov, and G.S. Elsaesser, 2022: Checkerboard patterns in E3SMv2 and E3SM-MMFv2. Geosci. Model Dev., 15, no. 15, 6243-6257, doi:10.5194/gmd-15-6243-2022.

An unphysical checkerboard pattern is identified in E3SMv2 and E3SM-MMF that is detectable across a wide range of timescales, from instantaneous snapshots to multi-year averages. A detection method is developed to quantify characteristics of the checkerboard signal by cataloguing all possible configurations of the eight adjacent neighbors for each cell on the model's cubed sphere grid using daily mean data. The checkerboard pattern is only found in cloud-related quantities, such as precipitation and liquid water path. Instances of pure and partial checkerboard are found to occur more often in E3SMv2 and E3SM-MMF when compared to satellite data regridded to the model grid. Continuous periods of partial checkerboard state are found to be more persistent in both models compared to satellite data, with E3SM-MMF exhibiting more persistence than E3SMv2. The checkerboard signal in E3SMv2 is found to be a direct consequence of the recently added deep convective trigger condition based on dynamically generated CAPE (DCAPE). In E3SM-MMF the checkerboard signal is found to be associated with the "trapping" of cloud-scale fluctuations within the embedded cloud-resolving model. Solutions to remedy this issue are discussed.

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BibTeX Citation

  author={Hannah, W. M. and Pressel, K. G. and Ovchinnikov, M. and Elsaesser, G. S.},
  title={Checkerboard patterns in E3SMv2 and E3SM-MMFv2},
  journal={Geoscientific Model Development},

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RIS Citation

ID  - ha05020x
AU  - Hannah, W. M.
AU  - Pressel, K. G.
AU  - Ovchinnikov, M.
AU  - Elsaesser, G. S.
PY  - 2022
TI  - Checkerboard patterns in E3SMv2 and E3SM-MMFv2
JA  - Geosci. Model Dev.
JO  - Geoscientific Model Development
VL  - 15
IS  - 15
SP  - 6243
EP  - 6257
DO  - 10.5194/gmd-15-6243-2022
ER  -

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