Publication Abstracts

Orbe et al. 2020

Orbe, C., L. Van Roekel, Á. Adames, G. Danabasoglu, A. Dezfuli, J. Fasullo, P.J. Gleckler, J. Lee, W. Li, L. Nazarenko, G.A. Schmidt, K. Sperber, and M. Zhao, 2020: Representation of modes of variability in 6 U.S. climate models. J. Climate, 33, no. 17, 7591-7617, doi:10.1175/JCLI-D-19-0956.1.

We compare the performance of several modes of variability across six US climate modeling groups, with a focus on identifying robust improvements in recent models (including those participating in the Coupled Model Intercomparison Project (CMIP) Phase 6) compared to previous versions. In particular, we examine the representation of the Madden-Julian Oscillation (MJO), the El Niño/Southern Oscillation (ENSO), the Pacific Decadal Oscillation (PDO), the Quasi-Biennial Oscillation (QBO) in the tropical stratosphere and the dominant modes of extra-tropical variability, including the Southern Annular Mode (SAM), the Northern Annular Mode (NAM) (and the closely related North Atlantic Oscillation (NAO)), and the Pacific-North American Pattern (PNA). Where feasible, we explore the processes driving these improvements through the use of "intermediary" experiments that utilize model versions between CMIP3/5 and CMIP6 as well as targeted sensitivity experiments in which individual modeling parameters are altered. We find clear and systematic improvements in the MJO and QBO and in the teleconnection patterns associated with the PDO and ENSO. Some gains arise from better process representation, while others (e.g. the QBO) from higher resolution that allows for a greater range of interactions. Our results demonstrate that the incremental development processes in multiple climate model groups lead to more realistic simulations over time.

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BibTeX Citation

  author={Orbe, C. and Van Roekel, L. and Adames, Á. and Danabasoglu, G. and Dezfuli, A. and Fasullo, J. and Gleckler, P. J. and Lee, J. and Li, W. and Nazarenko, L. and Schmidt, G. A. and Sperber, K. and Zhao, M.},
  title={Representation of modes of variability in 6 U.S. climate models},
  journal={J. Climate},

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RIS Citation

ID  - or01200v
AU  - Orbe, C.
AU  - Van Roekel, L.
AU  - Adames, Á.
AU  - Danabasoglu, G.
AU  - Dezfuli, A.
AU  - Fasullo, J.
AU  - Gleckler, P. J.
AU  - Lee, J.
AU  - Li, W.
AU  - Nazarenko, L.
AU  - Schmidt, G. A.
AU  - Sperber, K.
AU  - Zhao, M.
PY  - 2020
TI  - Representation of modes of variability in 6 U.S. climate models
JA  - J. Climate
VL  - 33
IS  - 17
SP  - 7591
EP  - 7617
DO  - 10.1175/JCLI-D-19-0956.1
ER  -

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