Abstract

A re-examination of tilt and gravity observations from Nova Scotia in light of recent ocean tide studies confirms previous assertions that the M2 tide in the western North Atlantic Ocean is intermediate between the numerical models of Tiron, Sergeev, and Michurin, and of Zahel.Tilt calculations, using a new M2 ocean tide model, reinforce the conclusion that the crust beneath Nova Scotia is of a transitional type between oceanic and thickened continental and is more easily deformed than most other crustal types.The tilt observations are in poor agreement with the Jachens–Kuo model, JK25, of the O1 tide in the western North Atlantic Ocean. It is suggested that the gravity observations, from which JK25 was inferred, were subject to amplitude and phase calibration errors. These errors are estimated from a comparison with the M2 results.

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