Publication Date:
2023-07-18
Description:
In the context of the ESA CCI Coastal Sea Level project, a complete reprocessing of high resolution along-track altimetry data of the Jason-1, Jason-2 and Jason-3 missions over January 2002 to January 2020 was performed along the world coastal zones. This reprocessing has provided valid sea level data in the 0-15 km band from the coast. A total of 750+ altimetry-based virtual coastal stations have been selected and sea level anomalies time series together with associated coastal sea level trends have been computed over the 2002-2020 time span. These virtual stations offer a unique tool for estimating sea level change close to the coast (typically up to 3 km to the coast but in many instances up to 1 km or even closer), especially in the coastal regions devoid from tide gauges. Results show that at about 90% of the virtual stations, the rate of sea level rise at the coast is similar to the rate offshore (15+ km away from the coast). In the remaining 10%, the sea level rate within 4-5 km from the coast is either faster or slower than offshore. In this presentation, we focus on a few coastal sites where the rate of sea level rise differs from that offshore. We discuss potential small-scale coastal processes (e.g., changes in shelf currents, waves, fresh water input from river runoff in deltas and estuaries, etc.) able to explain the observations.
Language:
English
Type:
info:eu-repo/semantics/conferenceObject
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