Local sea level trends, accelerations and uncertainties
Event: 2020 Ocean Surface Topography Science Team Meeting (virtual)
Session: Science I: Climate data records for understanding the causes of global and regional sea level variability and change
Presentation type: Type Forum
We estimate a local satellite altimetry error budget and use it to derive local confidence intervals for SL rise rates and accelerations. We estimate the local error variance-covariance matrix, and derive confidence intervals on trends and accelerations at the 90% confidence level.
Error variance-covariance matrices, SL trends and accelerations, along with corresponding uncertainties are provided as a NetCDF file.
Over 1993–2019, we find that the average local sea level trend uncertainty is 0.86 mm/yr with values ranging from 0.8 to 1.3 mm/yr. For accelerations, uncertainties range from 0.06 to 0.13 mm/yr/yr with a mean value of 0.065. We also perform a sensitivity study to investigate a range of plausible error budgets.