Sea level trend analysis for the central coast of the Gulf of Mexico 1999-2018
The contributions of the thermal expansion of the ocean and the reduction of the glacier mass in the polar ice caps in the face of the increase in the global average surface temperature, generate an increase in the average sea level on a global scale that particularly threatens human settlements in...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2022 |
| País: | México |
| Institución: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Investigaciones Geográficas |
| Idioma: | español inglés |
| OAI Identifier: | oai:ojs.pkp.sfu.ca:article/60525 |
| Acceso en línea: | https://www.investigacionesgeograficas.unam.mx/index.php/rig/article/view/60525 |
| Access Level: | acceso abierto |
| Palabra clave: | amenazas costeras ciclos de marea expansión térmica oceánica mareógrafos predicciones |
| Sumario: | The contributions of the thermal expansion of the ocean and the reduction of the glacier mass in the polar ice caps in the face of the increase in the global average surface temperature, generate an increase in the average sea level on a global scale that particularly threatens human settlements in the areas coastal. Due to this, studies that characterize the behavior of sea level in particularly vulnerable regions are essential. In this work, the current and future behavior in the central coast of the Gulf of Mexico was evaluated, to determine if it presents an increase similar to that identified globally. Tidal data from three stations belonging to the Tidal Network of the Secretaría de Marina (Secretary of Navy) were analyzed: Coatzacoalcos, Frontera and Veracruz. Using annual mean data, time evolution graphs were constructed, to which a trend line was associated through the method of least squares. Finally, using extrapolations, predictions of the behavior of the sea level were built to observe and compare the development of this variable. The results show a negative average global trend in the region, with a magnitude of -1.86 mm year-1 considering the period from 1999 to 2018. The average increase included in the first decade of the period is 3.6 mm year-1; in the second decade a decrease of approximately -1.26 mm year-1 was observed. This negative behavior identified in the central coast of the Gulf of Mexico may be due to the influence of mesoscale meteorological events, continental vertical movements or episodes of the La Niña phenomenon. |
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