南極氷床上におけるGPS連続観測

摘要

We conducted GPS observations in the vicinity of the Showa Station on the Antarctic ice sheet. Continuous GPS data for about one year were obtained. The flow velocity of the ice sheet obtained by GPS analysis was 5.1m/year, 14mm/day, and the direction was WNW. The movement of the ice sheet was fairly constant and no seasonal variations in velocity were observed.%昭和基地近傍の南極大陸氷床上において、連続GPS観測を行い、約1年間のデータを取得した。解析結果から得られた氷床の流動速度は、西北西の方向5.1m/year、14mm/dayであった。観測期間中、測位点の速度はほぼ一定で、明らかな季節変動は認められなかった。