On the cotidal configuration along the Pacific Coast of Mexico

Abstract

Harmonic Analysis of the tide at 15 stations along the Pacific Coast of Mexico and the Gulf of California, including 11 new stations which probably haven't been included in the published cotidal charts and 4 whose results have been published, are compared with the Bogdanov and Dietrich Charts. The agreement is not as good a.s might be expected. Results from the new station at Melchor Ocampo indicate the lack of an amphidromic point of the M₂ tide in the region. The phase values of the component S₂ from Mazatlán to Salina Cruz show that the propagation direction of the S₂ tide on the Bogdanov Chart is not correct; there should be a change of phase and the amphidromic point of coordinates 3°10'N, 125°20'W, should disappear. New cotidal charts for the M₂, S_2, K ₁ and O₁ are now presented here.