Publication Abstracts

Martin et al. 2023

Martin, Z.K., I.R. Simpson, P. Lin, C. Orbe, Q. Tang, J.M. Caron, C.-C. Chen, H. Kim, L.R. Leung, J.H. Richter, and S. Xie, 2023: The lack of a QBO-MJO connection in climate models with a nudged stratosphere. J. Geophys Res. Atmos., 128, no. 17, e2023JD038722, doi:10.1029/2023JD038722.

The observed stratospheric quasi-biennial oscillation (QBO) and the tropospheric Madden-Julian oscillation (MJO) are strongly connected in boreal winter, with stronger MJO activity when lower-stratospheric winds are easterly. However, the current generation of climate models with internally generated representations of the QBO and MJO do not simulate the observed QBO-MJO connection, for reasons that remain unclear. This study builds on prior work exploring the QBO-MJO link in climate models whose stratospheric winds are relaxed towards reanalysis, reducing stratospheric biases in the model and imposing a realistic QBO. A series of ensemble experiments are performed using four state-of-the-art climate models capable of representing the MJO over the period 1980-2015, each with similar nudging in the stratosphere. In these four models, nudging leads to a good representation of QBO wind and temperature signals, however no model simulates the observed QBO-MJO relationship. Biases in MJO vertical structure and cloud-radiative feedbacks are investigated, but no conclusive model bias or mechanism is identified that explains the lack of a QBO-MJO connection.

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BibTeX Citation

  author={Martin, Z. K. and Simpson, I. R. and Lin, P. and Orbe, C. and Tang, Q. and Caron, J. M. and Chen, C.-C. and Kim, H. and Leung, L. R. and Richter, J. H. and Xie, S.},
  title={The lack of a QBO-MJO connection in climate models with a nudged stratosphere},
  journal={J. Geophys Res. Atmos.},

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RIS Citation

ID  - ma03610h
AU  - Martin, Z. K.
AU  - Simpson, I. R.
AU  - Lin, P.
AU  - Orbe, C.
AU  - Tang, Q.
AU  - Caron, J. M.
AU  - Chen, C.-C.
AU  - Kim, H.
AU  - Leung, L. R.
AU  - Richter, J. H.
AU  - Xie, S.
PY  - 2023
TI  - The lack of a QBO-MJO connection in climate models with a nudged stratosphere
JA  - J. Geophys Res. Atmos.
VL  - 128
IS  - 17
SP  - e2023JD038722
DO  - 10.1029/2023JD038722
ER  -

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