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Measurement of Aerosols Optical Thickness of the Atmosphere using the GLOBE Handheld Sun Photometer
Published on: May 29, 2019
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Large-Scale Traveling Atmospheric and Ionospheric Disturbances Observed in GUVI With Multi-Instrument Validations
Katrina Bossert1,2, Larry J Paxton3, Tomoko Matsuo4
1School of Earth and Space Exploration Arizona State University Tempe AZ USA.
Geophysical Research Letters
|October 17, 2022
Summary
This study observed large-scale traveling ionosphere/atmospheric disturbances using multiple instruments, revealing their presence down to midlatitudes during auroral activity. Novel GUVI observations show potential for global thermospheric disturbance monitoring.
Area of Science:
- Space Physics
- Atmospheric Science
- Aeronomy
Background:
- Large-scale traveling ionosphere/atmospheric disturbances (LSTIDs/LSTADs) are significant phenomena in the upper atmosphere.
- Understanding LSTIDs/LSTADs is crucial during geomagnetic events and stratospheric warming.
- The thermosphere lacks comprehensive, long-term global measurement capabilities.
Purpose of the Study:
- To present multi-instrument observations of persistent LSTIDs/LSTADs.
- To demonstrate the utility of the Global Ultraviolet Imager (GUVI) for studying LSTADs.
- To investigate LSTID/LSTAD behavior during auroral electrojet activity and sudden stratospheric warming.
Main Methods:
- Utilized multi-instrument observations including GUVI, GOCE, SDI FPI, and Poker Flat ISR.
- Analyzed data from 19 UT to 5 UT on 18-19 January 2013 over the Alaska region.
- Focused on far ultraviolet emissions from GUVI for thermospheric disturbance studies.
Main Results:
- Confirmed the presence of LSTIDs/LSTADs extending to lower midlatitudes.
- Showcased the first-time use of GUVI for LSTAD research.
- Observed radiance changes between 140-180 km, indicating thermospheric disturbances.
Conclusions:
- GUVI far ultraviolet emissions offer a new method for global thermospheric disturbance studies.
- LSTIDs/LSTADs were observed during moderate auroral activity and sudden stratospheric warming.
- These findings enhance our understanding of upper atmosphere dynamics and variability.
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