Rederivation Of The Mgs Radio Occultation Measurements
In The Martian South Polar Winter Regions Using Mro-Mcs
Temperature Climatology.
K. Noguchi, M. Shimomura, Faculty Of Science, Nara Women’S University, Nara, Japan (Nogu@Ics.Narawu.Ac.Jp), A. KleinböHl, D. Kass, S. Piqueux, Jet Propulsion Laboratory, California Institute Of Technology,
Pasadena, Ca, Usa.

Introduction

Data And Method
The Mgs Radio Occultation Data Set [Tyler Et Al., 2001],
Which Can Be Obtained From The Nasa Planetary Data
System (Pds), Includes More Than 20,000 Profiles During Four Martian Years From Mars Year (My) 24 To 27.
The Data Includes Altitude, Temperature, Pressure And
Air Number Density. We Took Into Account The Measurement Uncertainty Of Temperature Which Was Provided In
The Original Pds Data Set, And Added The Uncertainty Of
Temperature At Each Level When Comparing With The Saturation Temperature [Hu Et Al., 2012, Noguchi Et Al., 2017]
To Exclude The Wrong Detection Of Supersaturation.
We Focused On The Southern Polar Night Regions (60◦ S–
90◦ S), Where The Decrease Of Co2 Is Large Due To The
Condensation Of Co2 Onto The Polar Cap. We Followed