Interannual analyses of the meridional distributions of Martian dust and clouds obtained by MRO-MCS

Katsuyuki NOGUCHI; Kaori IMAE; Mai KAWANISHI

Presentation information

International Session (Oral)

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

[P-PS02_28AM2] Mars

Mon. Apr 28, 2014 11:00 AM - 12:10 PM 418 (4F)

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

11:40 AM - 11:55 AM

[PPS02-P01_PG] Interannual analyses of the meridional distributions of Martian dust and clouds obtained by MRO-MCS

3-min talk in an oral session

*Katsuyuki NOGUCHI¹, Kaori IMAE¹, Mai KAWANISHI¹ (1.Nara Women's University)

Keywords:火星, MRO, MCS, ダスト, 水氷雲

We investigated the interannual variability of the meridional distributions of dust and clouds in the Martian atmosphere by using Mars Reconnaissance Orbiter Mars Climate Sounder (MRO-MCS) measurements. As the previous analyses did not consider measurement errors to depict the zonal averages, we took a criterion of 10% for the measurement error. Results show that Mars Year (MY) 29, which is regarded as a standard year in the previous analyses, had an enhancement of dust in the high altitudes (above 10 Pa) in the tropical region, and such an enhancement was not found in other MYs (28, 30 and 31). On the other hand, the distribution of ice clouds in MY 29 roughly agreed with other MYs’distribution.