Atmospheric waves

Lens adapted to this topic: How atmospheric waves are conventionally understood

The mainstream scientific account treats atmospheric waves as oscillatory disturbances governed by fluid dynamics, stratification, gravity, rotation, compressibility, and heating. It distinguishes wave types by scale and restoring force, and uses observations, numerical models, and approximations to study their propagation and effects on weather, climate, turbulence, and atmospheric circulation.

• Atmospheric waves include phenomena ranging from sound and gravity waves to planetary waves and atmospheric tides, classified by their scales and physical dynamics.
• Mountains, convection, heating contrasts, eruptions, and other disturbances can force waves in the atmosphere.
• Wave-driven momentum transport is important for interactions between different atmospheric layers, including the stratosphere.
• Observations of the 2022 Tonga eruption identified a fast Lamb-wave front and a slower atmospheric resonance consistent with theoretical expectations.
• Researchers must distinguish apparent gravity-wave signals from other processes, including inertial instability, by examining the broader meteorological environment.

Lens adapted to this topic: Alternative models and unresolved interpretation issues

A dissenting research perspective emphasizes that the atmosphere is strongly turbulent and nonlinear, so conventional linear or weakly nonlinear wave models may not capture all observed behavior. It proposes scaling-based and fractional wave descriptions, while other work questions whether some atmospheric disturbances should be interpreted through familiar gravity-wave analogies.

• Because atmospheric dynamics are highly nonlinear and turbulent, linear or weakly nonlinear wave theories may be inadequate for some observed behavior.
• A scaling-based approach proposes an effective fractional and anisotropic wave propagator with dispersion relations resembling those of inertial-gravity and Kelvin waves.
• Some large atmospheric disturbances have been described as tsunami-like, but theoretical analysis argues that the relevant Tonga-related air-wave branch is predominantly elastic rather than an ocean-style exchange of kinetic and gravitational energy.
• Temperature structures that resemble gravity-wave signals may instead result from inertial instability, making interpretation dependent on the surrounding atmospheric state.
• The alternative perspective does not reject atmospheric waves; it challenges whether standard classifications and classical equations are sufficient for turbulent or unusual cases.