HIRDLS temperature measurement sampling and resolution afford unprecedented views of the latitude-height structure of equatorial waves at altitudes above cloud tops in the tropical upper troposphere and stratosphere. Mixed Rossby-gravity waves with vertical wavelength as short as 4 km can be clearly seen in the data. Kelvin waves comprise a dominant signal throughout the 3 years of HIRDLS measurements. Time, height, and longitude variations are observed in these Kelvin waves.
Credit : Alexander, M. J., and D. A. Ortland (2010), Equatorial waves in High Resolution Dynamics Limb Sounder (HIRDLS) data, J. Geophys. Res., 115, D24111, doi:10.1029/2010JD014782.