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Assessment of the Madden‐Julian Oscillation in CMIP6 Models Based on Moisture Mode Theory

Authors :
Qiao‐Jun Lin
Víctor C. Mayta
Ángel F. Adames Corraliza
Source :
Geophysical Research Letters, Vol 51, Iss 8, Pp n/a-n/a (2024)
Publication Year :
2024
Publisher :
Wiley, 2024.

Abstract

Abstract 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 a stronger MJO. The background moist static energy (MSE) and low‐level zonal winds are more realistic in the models that satisfy the most criteria. The MSE budget associated with the MJO is also well‐represented in the good models. Capturing the MJO's moisture mode properties over the Indian Ocean is associated with a more realistic representation of the MJO and thus can be employed to diagnose MJO performance.

Details

Language :
English
ISSN :
19448007 and 00948276
Volume :
51
Issue :
8
Database :
Directory of Open Access Journals
Journal :
Geophysical Research Letters
Publication Type :
Academic Journal
Accession number :
edsdoj.1671a7a010a4a23abe903c3fe2204b3
Document Type :
article
Full Text :
https://doi.org/10.1029/2023GL106693