Gravity Wave Study in the MLT using ICON-MIGHTI Temperature and Wind Observations
Abstract
Atmospheric gravity waves have important roles in driving atmospheric coupling processes from the lower atmosphere to the mesosphere, thermosphere, and ionosphere. NASA's Ionospheric Connection Explorer (ICON) satellite was launched on 10 October 2019 and has been observing atmospheric temperatures and winds in the latitude range of 10S-40N. Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) is one of the instruments on ICON measuring temperatures and winds. Using both temperature and wind measurements from ICON-MIGHTI observations, small-scale perturbations (< wavenumber 6) are extracted and analyzed in the altitude range of 90-105 km and are considered to be gravity waves in this work. Obtained gravity waves will be compared to other satellite observations including TIMED/SABER. Vertical profiles of ICON-MIGHTI winds and temperatures are further analyzed to study instabilities including Richardson numbers and Brunt Vaisala frequency. Relationship between these instabilities and gravity waves will also be briefly discussed in this work.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2020
- Bibcode:
- 2020AGUFMSA0080008N
- Keywords:
-
- 3334 Middle atmosphere dynamics;
- ATMOSPHERIC PROCESSES;
- 3337 Global climate models;
- ATMOSPHERIC PROCESSES;
- 3360 Remote sensing;
- ATMOSPHERIC PROCESSES;
- 3384 Acoustic-gravity waves;
- ATMOSPHERIC PROCESSES