HR: 1340h
AN: G33A-0020    [Abstracts]
TI: Recent Progress of Geodetic Research around Syowa Station, Antarctica, in Relation to IPY2007-2008
AU: Shibuya, K
EM: shibuya@nipr.ac.jp
AF: National Institute of Pola Research, Kaga 1-9-10, Itabashi-ku, Tokyo, 173-8515 Japan
AU: Doi, K
EM: doi@nipr.ac.jp
AF: National Institute of Pola Research, Kaga 1-9-10, Itabashi-ku, Tokyo, 173-8515 Japan
AU: Nogi, Y
EM: nogi@nipr.ac.jp
AF: National Institute of Pola Research, Kaga 1-9-10, Itabashi-ku, Tokyo, 173-8515 Japan
AU: * Kanao, M
EM: kanao@nipr.ac.jp
AF: National Institute of Pola Research, Kaga 1-9-10, Itabashi-ku, Tokyo, 173-8515 Japan
AB: Several precise geodetic observations with VLBI, GPS, absolute gravimeter (AG), superconducting gravimeter (SG), etc. have been carried out at Syowa Station from early 1990s. The VLBI result (1999-2003) supports the hypothesis of one rigid Antarctic plate, however, longer observations may clear discrepancy from the NNR-NUVEL-1A model. Crustal uplift rates by VLBI, GPS and DORIS are within the range from 2.3 mm/yr to 4.6 mm/yr. Absolute gravity observations done three times during 1994-2004 at the Syowa IAGBN(A)#0417 point gave the change rate of -0.3+- 0.4 microGal/yr, and require more time span to estimate the relation between dg/dt and dh/dt. The 10-years' SG data were archived and the tidal gravimetric factors to an accuracy of 0.1percent were obtained for the periods from 0.5 to 32 days. Two ocean bottom pressure gauges (OBPs) installed to the north of Syowa Station (about 250 km) recorded the tsunami induced by the Sumatera Earthquake of December 26, 2004. We have an archive of 20,000 SAR scenes from JERS-1, ERS-1, and ERS-2 over East Antarctica, and studying to delineate the grounding zone to update the ADD coastlines for the regions from 25W to 40E. Several planned activities of the above related themes and other observations will be presented.
DE: 0700 CRYOSPHERE (4540)
DE: 0758 Remote sensing
DE: 0774 Dynamics
SC: Geodesy [G]
MN: Fall Meeting 2005