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Data · dataset · 2026

Seasonal variations of medium-scale waves observed by ICON-MIGHTI

Listed in National Center for Atmospheric Research

Description

This work presents an analysis of seasonal variations of medium-scale perturbations (similar to 500 to similar to 5,700 km) spanning altitudes from 90 to 250 km using temperature and wind measurements made by the Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) instrument onboard the Ionospheric Connection Explorer (ICON) in the latitude range of 0 degrees-40 degrees N during 2020-2021.

Both medium-scale perturbations (MSP) in temperature and winds below similar to 120 km show semi-annual variations, whereas annual variations of MSP for winds become dominant between 160 and 250 km. The largest wind MSP was observed at similar to 110-120 km throughout the year. Spatial variations of MSP at 90-250 km do not show clear geographic patterns in either temperature or wind.

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Our analysis suggests both seasonal variations of MSP between 90 and 250 km altitudes are influenced by variation on both the sources of MSP and changes in the background wind.

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Imaging 75% · Tropospheric and stratospheric physics 76%
Provenance · 1 source records, 9 field assertions
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