[A-AS04] Evolution of Global Environmental Research based on Atmospheric Vertical Motions

[AAS04-05] Comparison of vertical velocity measurements between LODEWAVE and PANSY

*Yoshihiro Tomikawa¹, Yoshitaka Saito², Isao Murata³, Masashi Kohma⁴, Kaoru Sato⁴ (1.National Institute of Polar Research, 2.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3.Graduate School of Environmental Studies, Tohoku University, 4.Graduate School of Science, The University of Tokyo)

Keywords:Super-pressure balloon, PANSY radar, Vertical wind, Antarctic

Super-pressure balloons have high pressure resistance and gas tightness and fly on a constant density surface for a long period (i.e., one month or more) by maintaining a constant buoyancy. We performed campaign observations of the super-pressure balloon (LODEWAVE: LOng-Duration balloon Experiment of gravity WAVE over Antarctica) at Syowa Station, Antarctica, in January and February 2022 and 2024, and obtained meteorological observation data (i.e., temperature, pressure, and 3D position information) in the lower stratosphere (around 18 km altitude) at 30-sec intervals. This was the first scientific observation by a super-pressure balloon developed in Japan. Theoretically, super-pressure balloons cannot directly capture the vertical motion of the atmosphere because they fly over constant density surfaces. However, by assuming adiabatic processes and hydrostatic equilibrium, it is possible to estimate short-period variations in the vertical motion of the atmosphere from the balloon's vertical motion, which is mainly used to study atmospheric gravity waves. In this presentation, we report the results of verifying the vertical wind disturbances estimated from super-pressure balloon observations using simultaneous observation data by the PANSY radar, and using them to estimate the parameters of atmospheric gravity waves.