Determination of the tide constituents at Livingston and Deception Islands (South Shetland Islands, Antarctica), using annual time series

Abstract

A detailed study is presented of the tidal constituents for Livingston and Deception Islands (Antarctica) obtained at the LIVMAR and DECMAR tide gauge stations. Data were acquired with tide gauge pressure sensors, and calculated from a long time series of 798 days of data-logging, using the least-squares harmonic estimation method. The results show an improvement over previous results in the region. Seventy tidal constituents were obtained, of which 19 were the most representative with amplitudes greater than 1 cm and a contribution of 93% of the wave energy. In both stations, it was confirmed that the tides are mixed, with a semi-diurnal behavior. The tidal gauge benchmarks (TGBMs) were linked to vertical and horizontal Antarctic Geodetic Networks, which provides a very important contribution for geodetic, oceanographic and hydrographic studies in the area.

Evidence of Sea Level Rise at the Peruvian Coast (1942-2019)

“…The TGBMs are linked to altimetric geodetic vertices of the official geodetic networks of Peru, which have been established and are under the responsibility of the IGN. The altimeter geo-referencing has been carried out according to the specifications of UNESCO (1994), very similar to the criteria stated by Jigena et al (2015aJigena et al ( , 2015bJigena et al ( , 2018.…”

“…Hünicke and Zorita, 2016;Andersen and Piccioni, 2016;Orejarena-Rondón et al, 2019;Lan et al, 2021), in many countries there are insufficient long-term sea level records to allow comprehensive and predictive studies to be made. In the majority of the cases, and especially in areas of difficult access and in developing countries, the data have only been taken during the summer season, or for specific projects, and, generally, the data are taken over a year or less duration (Muñoz-Perez and Abarca, 2009;Jigena et al, 2015aJigena et al, , 2015b.…”

Determinación del nivel medio del mar en el mar de Bransfield. Aplicación a la determinación del geoide en islas Decepción y Livingston, Islas Shetland del Sur (Antártida)

“…Se aplicaron correcciones de mareas, altura y deriva a todo el conjunto de datos gravimétricos. Los detalles de los sensores y equipos utilizados los podemos ver en Jigena et al (2015Jigena et al ( , 2016.…”

“…El resultado del ajuste entre los datos reales y los datos predichos es de un 99.3%, que es un parámetro excelente y muy representativo para realizar predicciones en base a los datos obtenidos y utilizados en el análisis. Los resultados obtenidos en amplitud y desfase de las principales componentes de marea en ambas estaciones se muestran en la Tabla 6 y mayores detalles se pueden consultar en Jigena et al (2015).…”

“…Este ajuste nos proporciona un valor medio del nivel de marea para cada instante de la lectura referido al TGBM y los valores medios de profundidad de fondeo de los sensores y cuyos resultados se aprecian en la Figura 7. Los detalles y la metodología se encuentran explicados en Vidal et al (2012) y Jigena et al (2014Jigena et al ( , 2015. En la Tabla 7 vemos la relación entre las estaciones mareográficas con respecto a los vértices geodésicos de referencia, con los resultados obtenidos en los vértices de BEJC, COLA y LN00, con los errores estimados asociados a los mismos.…”