Japan Geoscience Union Meeting 2016

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International Session (Oral)

Symbol P (Space and Planetary Sciences) » P-PS Planetary Sciences

[P-PS02] Mars

Mon. May 23, 2016 3:30 PM - 5:00 PM 104 (1F)

Convener:*Takehiko Satoh(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Masaki Ishiwatari(Department of Cosmosciences, Graduate school of Science, Hokkaido University), Sho Sasaki(Department of Earth and Space Sciences, School of Science, Osaka University), Yoshiyuki O. Takahashi(Graduate School of Science, Kobe University), Ayako Matsuoka(Research Division for Space Plasma, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Hideaki Miyamoto(The University Museum, The University of Tokyo), Sushil Atreya(University of Michigan Ann Arbor), Chair:Hideaki Miyamoto(The University Museum, The University of Tokyo)

4:45 PM - 5:00 PM

[PPS02-10] Longitudinal dependence of CO2 supersaturation during northern winter in the Martian atmosphere

*Katsuyuki Noguchi1, Yasuko Morii1, Naoka Oda1, Takeshi Kuroda2 (1.Nara Women's University, 2.Tohoku University)

Keywords:Mars, supersaturation, CO2

Using the temperature profiles of MGS radio occultation measurements (1998-2007), we show the strong longitudinal dependence of CO2 supersaturation during northern winter in the Martian high-latitude (60-80N) atmosphere. The CO2 supersaturation appears more frequently in the longitudes of 90-180E and 270-360E at the pressure levels of 400-30 Pa. The areas of CO2 supersaturation overlap with zonal temperature minima.