Sea-Level Trend at the Southernmost Region of South America

ABSTRACT Dragani, W.C.; D'Onofrio, E.; Alonso, G.; Fiore, M., and Oreiro, F., 2014. Sea-level trend at the southernmost region of South America. Tide gauge data were used to estimate the sea-level trend at the Ushuaia tidal station (54°49′ S, 68°13′ W), located at the southernmost city in the world. The Ushuaia tidal station began working in 1951 but was relocated in 1970 approximately 900 m from its original location. Special care was taken in linking both data series to compose a single and reliable sea-level record gathered from 1952 to 2005. The least-square regression line for annual mean sea level (relative to the benchmark) was fitted, and the computed slope that resulted was not significantly different from zero. A low-pass filter was applied to the annual sea-level data series to smooth the constituents of tide longer than 1 year, which could mislead the trend of the mean sea level. The trend of the best fit line computed from the filtered data was −0.2 mm y−1, which was not significantly differe...