Ground tilt observations at Syowa Station, Antarctica. Part 2. Water-tube tiltmeter

概要

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To observe the secular change of ground tilt in response to deglaciation in Antarctica, a water-tube tiltmeter was installed at Syowa Station, in the snow-free area without a vault. It was the first observation of ground tilt using a water-tube tiltmeter in Antarctica. The tiltmeter adopted is a moving float type using antifreeze as the fluid. The tiltmeter consists of four detectors which measure two tilt components. The detectors were covered with wooden boxes and the water-tubes were covered by airtight polyvinyl chloride tubes. Observations began in April 1981. The records were strongly affected by air temperature and solar radiation. In spite of these problems it was found that the ground tilt observations by means of water-tube tiltmeters was possible in the Antarctic region, even if there was no vault for installing the equipments.
国立極地研究所の論文