Japan Geoscience Union Meeting 2023

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[E] Oral

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

[P-EM12] Coupling Processes in the Atmosphere-Ionosphere System

Sun. May 21, 2023 1:45 PM - 3:00 PM 101 (International Conference Hall, Makuhari Messe)

convener:Huixin Liu(Earth and Planetary Science Division, Kyushu University SERC, Kyushu University), Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Loren Chang(Department of Space Science and Engineering, National Central University), Yue Deng(University of Texas at Arlington), Chairperson:Thomas J Immel(University of California Berkeley), Loren Chang(Department of Space Science and Engineering, National Central University)


2:00 PM - 2:15 PM

[PEM12-12] Impact of El Nino-induced tropospheric ozone modulation on tides

*Huixin Liu1, Masaru Kogure1, Hidekatsu Jin2 (1.Earth and Planetary Science Division, Kyushu University, 2.National Institute for Communication and Technology (NICT))

Keywords:atmosphere tides in MLT, troposphere ozone, tidal generation

To assess the impacts of the tropospheric ozone modulation due to El Niño on tides, we performed two simulations by using the GAIA model: zonally symmetric ozone density and longitudinal ozone variation of an El Niño pattern. Our results show that the ozone modulation strengthens (attenuates) the first symmetric mode of the DW2 (D0 and DW1) tide by ~+5% (~-1% and ~-4%) from ~20 km to ~100 km altitudes on average. These responses are probably attributed to the tropospheric ozone modulation. These responses are reasonable because both the ozone modulation and these first modes have a peak in the equator. Also, the vertical wavelengths of the first modes are about twice as long as the vertical thickness of the ozone modulation. Our results suggest that the ozone modulation due to El Niño influences the diurnal tides by a few percent because of the ozone modulation spatial structure.