CEDAR
Coupling, Energetics and Dynamics of Atmospheric Regions Program
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Observation of solar eclipse induced thermospheric changes from GOLD mission

Saurav
Aryal
CU Boulder/LASP
Abstract text

The Global Observation of Limb and Disk (GOLD) mission has spatio-spectrally observed multiple solar eclipses in its field of view (at ~132 -164 nm). The measured OI: 135.6 nm and N2 LBH emission features are used to derive the column O/N2 ratio (from 135.6 nm and LBH ratio) and the line-of-sight neutral temperature, TDISK (from the spectral structure of LBH). These observations have shown significant increase in composition (O/N2 ratio) and reduction in TDISK within eclipsed regions. However, it is not entirely clear if the assumptions made for retrieval and interpretation of daytime thermospheric composition and temperature from GOLD observations hold during eclipsed conditions. In this study, we present results from the April8, 2024 and October 14, 2023 solar eclipses observed by GOLD. We also attempt to quantify any effects of the radiative recombination (RR) contribution (to 135.6 nm emissions) and solar active regions to the retrieved O/N2 and TDISK during these eclipses.

Authors
Saurav Aryal, Laboratory of Atmospheric and Space Physics, University of Colorado Boulder
Sebastijan Mrak, JHU Applied Physics Laboratory
J. Scott Evans, Computational Physics, Inc.
Phil Chamberlin, Laboratory of Atmospheric and Space Physics, University of Colorado Boulder
Naomi Maruyama,Laboratory of Atmospheric and Space Physics, University of Colorado Boulder
and Richard Eastes, Laboratory of Atmospheric and Space Physics, University of Colorado Boulder
Non-Student
Poster category
SOLA - Solar Terrestrial Interactions in the Upper Atmosphere
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