@inproceedings{oai:jaxa.repo.nii.ac.jp:00020666,
 author = {鳴海, 泰典 and Narumi, Yasunori},
 book = {第36回月・惑星シンポジウム, Proceedings of the 36th ISAS Lunar and Planetary Symposium},
 month = {Nov},
 note = {Smith et al. (2001) reported the seasonal variations of snow depth on Mars using topography collected from the Mars Orbiter Laser Altimeter (MOLA) on the Mars Global Surveyor (MGS). A seasonal pressure variation curve was derived from the snow depth data of Smith et al. (2001), and it was compared with the Viking pressure curves. The agreement of those two pressure variation curves is not so good. At first, the amplitude of seasonal pressure variation derived from the snow depth data is smaller than that of Viking observations. This means that the CO2 ice amount accumulated on polar regions during winter season was not so large as expected by the Viking pressure variation curves. Next, the phase of minimum and maximum pressure differs in those two pressure curves. For example, in the pressure curve derived from the snow depth data, the maximum pressure occurs a little earlier than that in the Viking pressure curves. This suggests that the CO2 ice evaporation in the south hemisphere during the snow depth observation may be earlier than that during the Viking observations. Finally, the snow depth data show the large effect of dust storms. On the other hand, the Viking Lander data show little effect of dust storms. There is a possibility that the meteorological environment of Mars suffered some variations since the time of the Viking observations., 資料番号: AA0046650017},
 pages = {65--68},
 publisher = {宇宙航空研究開発機構宇宙科学研究本部, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)},
 title = {Polar caps of Mars: Snow depth data and Viking pressure curves},
 year = {2003}
}