Propagation and amplification of tide at the northeastern coast of the Antarctic peninsula: an observational study

• Main Authors: D'Onofrio,Enrique E., Dragani,Walter C., Speroni,Jorge O., Fiore,Monica M. E.
• Format: Report
• Language: English
• Published: Departamento Oceanografia, Servicio de Hidrografia Naval/Departamento Oceanografia, Servicio de Hidrografia Naval/Departamento Oceanografia, Servicio de Hidrografia Naval/Departamento Oceanografia, Servicio de Hidrografia Naval 2003
• Subjects: tide,measurements,tidal constituents,Antarctic Peninsula; Antarctic; The Antarctic; Antarctic Peninsula; Seymour; Seymour Island; Larsen Ice Shelf; Esperanza; Marambio; Larsen Nunatak; Antarc*; Ice Shelf; Polar geoscience
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3121; http://id.nii.ac.jp/1291/00003121/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3121&item_no=1&attribute_id=18&file_no=1

The amplification and propagation of the tide at the northeastern coast of the Antarctic Peninsula was studied by analysis of instantaneous sea levels measured at the tidal station of Base Esperanza,at the northern end of the Antarctic Peninsula (63゜22.46'S, 56゜59.33'W) ,at the northeastern coast of Marambio Island (Seymour Island,64゜14.11'S, 56゜34.51'W) and near Base Matienzo,Larsen nunatak (64゜54.23'S, 60゜2.60'W) at the edge of the Larsen ice-shelf. By means of harmonic analysis the amplitudes and phases of the most energetic ten tidal constituents were obtained.The tidal regime was typified by means of the factor F and a preponderantly semidiurnal mixed tide was obtained. Signi ficant southward amplification was observed in the amplitudes of semidiurnal constituents,and a less evident amplification was obtained in diurnal ones.Consequently,slightly southward diminution in factor F,from 0.75 (Esperanza) to 0.6 (Matienzo),was found.Bothsouthward amplification in amplitudes and northward propagation of the main tidal constituents obtained from numerical global models show good agreement with the present observations.