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The study aims to assess the influence of different parameterization schemes on convectively coupled Rossby gravity waves in atmospheric models.

Evaluation of CAM Single‐Column Models in Simulating Convectively Coupled Rossby Gravity Waves During TRMM‐KWAJEX

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This evaluation examines how parameterization schemes affect Rossby gravity waves in atmospheric models, suggesting improvements may be needed.

The study aims to assess the influence of different parameterization schemes on convectively coupled Rossby gravity waves in atmospheric models.
Utilized observational data from the TRMM‐KWAJEX field campaign
Examined four parameterization configurations: CAM_ZMUW, CAM_UNICON, CAM_CLUBB, CAM_SP
Analyzed precipitation, diabatic heating fields, and MRG wave characteristics
Evaluated the impact of subgrid variability using the Stochastic Subgrid Importance Latin Hypercube Sampler.
Diabatic heating fields showed significant differences influenced by parameterization choice
CAM_ZMUW and CAM_UNICON produced overly strong convection, while CAM_CLUBB underestimated low-level moistening
Only CAM_CLUBB and CAM_SP accurately represented vertical transport of moist static energy convergence
Stricter convective triggering in ZM convection slightly alleviated dry bias but did not enhance MRG wave simulation.

Li et al. (2026) studied this question.

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This evaluation examines how parameterization schemes affect Rossby gravity waves in atmospheric models, suggesting improvements may be needed.