Removing spurious inertial instability signals from gravity wave temperature perturbations using spectral filtering methods

Strube, Cornelia; Ern, Manfred; Preusse, Peter; Riese, Martin

doi:https://doi.org/10.5194/amt-13-4927-2020

Articles | Volume 13, issue 9

https://doi.org/10.5194/amt-13-4927-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-13-4927-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 13, issue 9

Research article

|

18 Sep 2020

Research article |

| 18 Sep 2020

Removing spurious inertial instability signals from gravity wave temperature perturbations using spectral filtering methods

Cornelia Strube, Manfred Ern, Peter Preusse, and Martin Riese

Data sets

SABER Temperature and CO2 Retrieval Accuracies SABER http://saber.gats-inc.com/temp_errors.php

Short summary

We present how inertial instabilities affect gravity wave background removal filters on different temperature data sets. Vertical filtering has to remove a part of the gravity wave spectrum to eliminate inertial instability remnants, while horizontal filtering leaves typical gravity wave scales untouched. In addition, we show that it is possible to separate inertial instabilities from gravity wave perturbations for infrared limb-sounding satellite profiles using a cutoff zonal wavenumber of 6.