Japan Geoscience Union Meeting 2022

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[E] Oral

P (Space and Planetary Sciences ) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM13] Coupling Processes in the Atmosphere-Ionosphere System

Wed. May 25, 2022 10:45 AM - 12:15 PM 302 (International Conference Hall, Makuhari Messe)

convener:Huixin Liu(Earth and Planetary Science Division, Kyushu University SERC, Kyushu University), convener:Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Loren Chang(Institute of Space Science, National Central University), convener:Yue Deng(University of Texas at Arlington), Chairperson:Masaki Tsutsumi(National Institute of Polar Research), Tatsuhiro Yokoyama(Kyoto University), Masaru Kogure(Kyushu University)


11:15 AM - 11:30 AM

[PEM13-21] Atmospheric Tides from 90 km to 250 km altitude as observed from the ICON-MIGHTI instrument.

★Invited Papers

*Chihoko Y Cullens1, Jeffrey Forbes1, Scott England3, Thomas J Immel2, Astrid I Maute6, Michael H Stevens4, Jonathan Makela5, Brian Harding2 (1.University of Colorado Boulder, 2.University of California Berkeley, 3.Virginia Tech, 4.Naval Research Laboratory, 5.university of illinois urbana champaign, 6.National Center for Atmospheric Research)

Keywords:ICON-MIGHTI, tides, HME

Atmospheric tides are an important driver for atmospheric coupling processes. However, observational studies of tidal climatology in the thermosphere are still rare due to the limited global wind observations of the thermosphere. ICON-MIGHTI was launched in October 2019 with data available since December 2019. MIGHTI measures zonal and meridional neutral wind spanning altitudes from ~94 km to ~250 km (local time coverage depends on altitudes) and temperature at all local times from ~90 km to ~108 km. Utilizing MIGHTI winds and temperature data, this work presents a climatology of atmospheric tides from 90 km to 250 km in the latitude range of 10°S to 40°N including diurnal, semi-diurnal, and terdiurnal tides. Tides derived from the MIGHTI measurements are then used for Hough Mode Extension fitting to estimate global tidal variabilities. A few key examples of MIGHTI tides, HME, and TIEGCM forced by MIGHTI-HME will be compared to discuss causes of tidal variability.