loading page

Assessment of the Madden-Julian Oscillation in CMIP6 Models based on Moisture Mode Theory
  • Qiao-Jun Lin,
  • Victor C. Mayta,
  • Ángel F. Adames-Corraliza
Qiao-Jun Lin
University of Wisconsin-Madison

Corresponding Author:[email protected]

Author Profile
Victor C. Mayta
University of Wisconsin, Madison
Author Profile
Ángel F. Adames-Corraliza
Department of Atmospheric and Oceanic Sciences
Author Profile


The moist processes of the Madden-Julian Oscillation (MJO) in the Coupled Model Intercomparison Project Phase 6 models are assessed using moisture mode theory-based diagnostics over the Indian Ocean (10°S-10°N, 75°E-100°E). Results show that no model can capture all the moisture mode properties relative to the reanalysis. Most models satisfy weak temperature gradient balance but have unrealistically fast MJO propagation and a lower moisture-precipitation correlation. Models that satisfy the most moisture mode criteria reliably simulate the background moist static energy (MSE) and low-level zonal winds compared to models that satisfy the least amount of criteria. The MSE budget associated with the MJO is also well-represented in the good models rather than in the poor models. Our results show that capturing the MJO's moisture mode properties over the Indian Ocean is associated with a more realistic representation of the MJO simulation and thus can be employed to diagnose MJO performance.
17 Oct 2023Submitted to ESS Open Archive
17 Oct 2023Published in ESS Open Archive