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Sea Level trends along Brazilian Coast

PI: Daniel Moita
Institution: Instituto Oceanografico - University of São Paulo
This project studies the variations of sea level in the coast of Brazil using 3 different types of data. Data from tide-gauge, satellite altimetry and simulations form numerical models are compared. When annual mean sea level are analyzed,
data from tide-gauge shows positive trends with minimum of 1.39mm/yr and maximum of 4.13mm/yr. Both values are from the coast of the Brazilian state of São Paulo. The differences in those values in very close areas can indicate the low quality of those data.
When analyzing the altimetry data from the mission TOPEX/POSEIDON, trends ranging from 0.77mm/yr to 5.36mm/yr are observed for the period from 1993 to 2005 along the Brazilian coast. When compared with the closest tide-gauge data for the period 1993-2005, the correlation between these data is small.
The short period of altimetry data, the low quality and low number of tide-gauge stations along the coast of Brazil makes necessary the use of numerical model data with the objective of trying to understand the past variations of the sea level in the Brazilian coast.

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