Analysis of vertical reference levels in the brazilian coast: comparing local and global approaches



Título del documento: Analysis of vertical reference levels in the brazilian coast: comparing local and global approaches
Revista: Boletim de ciencias geodesicas
Base de datos: PERIÓDICA
Número de sistema: 000456760
ISSN: 1413-4853
Autores: 1
2
Instituciones: 1Instituto Federal de Mato Grosso, Departamento de Infraestrutura, Cuiabá, Mato Grosso. Brasil
2Universidade Federal do Paraná, Departamento de Geomática, Curitiba, Paraná. Brasil
Año:
Volumen: 28
Número: 3
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico, descriptivo
Resumen en inglés There is a historical search for the unification of different geodetic reference systems in order to better integrate geodetic investigations. In particular, coastal zones pose the challenge of connecting terrestrial and oceanic references when working with different vertical reference levels. This study aims to investigate the goodness-of-fit of ocean models to local observations, as well as to update and improve reference levels (RL) in two tide gauges (TGs) in Brazil (Imbituba and Fortaleza). Local RLs were connected to a global reference system (GRS80), which allowed absolute analyses using the mean sea surface (MSS) and lowest astronomical tide (LAT) models MSS_CNES_ CLS15, DTU_15_MSS, DTU_18_MSS and DTU_15_LAT. In the selected TGs, the MSS models showed a difference of centimeters in regards to the local mean sea level (MSL) defined by the Directorate of Hydrography and Navigation (DHN). Sea Surface Topography (SSTop) values were estimated from Global Geopotential Models and MSL data. The results indicated possible inconsistencies in the global model of LAT when compared to local observations, likely due to the difficulty of modeling coastal zones
Disciplinas: Geociencias
Palabras clave: Geodesia,
Niveles de referencia vertical,
Costas,
Modelos oceánicos,
Brasil
Keyword: Geodesy,
Vertical reference levels,
Coastal zones,
Ocean models,
Brazil
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