Open AccessEffect of ocean tides on gravity tides in Japan: the case of M 2 tide
Author(s) -
Tanaka T.
Publication year - 1977
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1977.tb01327.x
Subject(s) - gravimeter , ocean tide , geology , geodesy , oceanography , geophysics , solid earth , casing
Summary The effects of ocean tides on the M 2 tidal changes of gravity observed at several stations in Japan have been estimated by applying the Green's function given by Farrell in 1972. Gravity tides observed by using an Askania Gs‐11 gravimeter (No. 11 1) from 1957 to 1959 (ICY) are generally small compared with theoretical values expected from the Gutenberg–Bullen A Earth model. Though results from recent observations by new Askania gravimeters and a LaCoste & Romberg gravimeter show better agreement with the theoretical values, the differences remaining are not negligible. A significant alteration of the ocean tidal model near Japan is required in order to explain such differences.