doi:

DOI: 10.3724/SP.J.1085.2013.00339

Advances in Polar Science 2013/24:4 PP.339-343

Field measurements of absolute gravity in East Antarctica


Abstract:
This paper reports the results of field-based absolute gravity measurements aimed at detecting gravity change and crustal displacement caused by glacial isostatic adjustment.The project was initiated within the framework of the 53rd Japanese Antarctic Research Expedition(JARE53).Absolute gravity measurements,together with GPS measurements,were planned at several outcrops along the Prince Olav Coast and Sôya Coast of East Antarctica,including at Syowa Station.Since the icebreaker Shirase(AGB 5003)was unable to moor alongside Syowa Station,operations were somewhat restricted during JARE53.However,despite this setback,we were able to complete measurements at two sites:Syowa Station and Langhovde.The absolute gravity value at the Syowa Station IAGBN(A)site,observed using an FG-5 absolute gravimeter(serial number 210;FG-5#210),was982 524 322.7±0.1μGal,and the gravity change rate at the beginning of 2012 was-0.26μGal·a-1.An absolute gravity value of 982535 584.2±0.7μGal was obtained using a portable A-10 absolute gravimeter(serial number 017;A-10#017)at the newly located site AGS01 in Langhovde.

Key words:absolute gravity,field measurement,Antarctica,A-10 and FG-5 absolute gravimeters,GPS,JARE

ReleaseDate:2015-04-16 13:27:19



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