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Prospects for meteotsunami detection in earth's atmosphere using GNSS observations
Panagiotis Vergados1, Siddharth Krishnamoorthy1, Léo Martire1
1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA USA.
GPS Solutions
|July 17, 2023
Summary
Meteotsunamis generate atmospheric gravity waves (GWs), detectable via Global Navigation Satellite System (GNSS) radio occultation and satellite temperature data. These waves offer insights into meteotsunami atmospheric coupling.
Area of Science:
- Atmospheric science
- Geophysics
- Space physics
Background:
- Meteotsunamis are ocean waves triggered by atmospheric disturbances.
- Their atmospheric coupling and detectability remain poorly understood.
- Gravity waves (GWs) are theorized to link atmospheric and oceanic phenomena.
Purpose of the Study:
- To investigate the physical coupling of meteotsunamis with the Earth's atmosphere.
- To assess the detectability of meteotsunami-generated atmospheric waves.
- To analyze the June 13, 2013 meteotsunami event off the US East Coast.
Main Methods:
- Utilizing Global Navigation Satellite System (GNSS) radio occultation (RO) measurements.
- Employing Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) temperature data.
- Analyzing ground-based GNSS ionospheric total electron content (TEC) observations.
- Applying linear gravity wave (GW) theory for dynamic coupling analysis.
Main Results:
- RO data revealed stratospheric GW activity near the event.
- SABER data confirmed GWs in the mesosphere with increased vertical wavelength.
- GNSS-TEC data detected a far-field ionospheric response 9 hours later.
- Observations align with GW theory predictions for meteotsunami coupling.
Conclusions:
- GNSS RO measurements are valuable for studying meteotsunami atmospheric interactions.
- Meteotsunamis generate detectable atmospheric gravity waves.
- Combined GNSS RO and TEC data enhance understanding of these phenomena.
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