@inproceedings{oai:jaxa.repo.nii.ac.jp:00020577, author = {原田, 雄司 and 日置, 幸介 and Harada, Yuji and Heki, Kosuke}, book = {第38回月・惑星シンポジウム, Proceedings of the 38th ISAS Lunar and Planetary Symposium}, month = {Mar}, note = {Secular obliquity variations due to climate friction on Mars are calculated. Martian interior is considered to be a three-layered structure. A viscosity of each layer is treated as a parameter. The results give knowledge as follows. First, under an internal structure with a visco-elastic crust and/or a solid core, the effect of the climate friction becomes greater than that concluded by previous research. Second, under an internal structure with a heterogeneous mantle, the possibility of the great effect of the climate friction becomes stronger than that concluded by previous research., 資料番号: AA0063350062}, pages = {232--235}, 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 = {Secular obliquity variations due to climate friction on Mars: Re-examination in influence of Martian internal viscosity structure}, year = {2006} }