TERRAPUB Journal of Oceanography

Journal of Oceanography, Vol. 58 (No. 3), pp. 519-523, 2002

Short Contribution

Evaluation of Seasonal Sea Level Variation at Syowa Station, Antarctica, Using GPS Observations

Shigeru Aoki1*, Kazuo Shibuya1, Akihiro Masuyama2, Taku Ozawa1 and Koichiro Doi1

1Center for Antarctic Environment Monitoring, National Institute of Polar Research, Kaga, Itabashi-ku, Tokyo 173-8515, Japan
2Hydrographic Department, Japan Coast Guard, 5-3-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan

(Received 1 May 2001; in revised form 27 August 2001; accepted 3 September 2001)

Abstract: Global Positioning System (GPS) measurements of the vertical displacement of fast ice near Syowa Station, Antarctica, were conducted between April and December 1998 to evaluate measurements of sea level variation derived with a conventional bottom pressure gauge (BPG). The BPG-derived sea level revealed a seasonal variation of about 0.13 m, with a high in April-June and a low in November-December. The GPS-derived sea level, combined with observed sea ice thickness, supported the BPG result, with an RMS error of 0.007 m. Our result also demonstrates that GPS is a powerful technique for monitoring sea level variations.

*Corresponding author E-mail: shigeru@nipr.ac.jp

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