Observation-based trajectory of future sea level for the coastal United States tracks near high-end model projections

Abstract With its increasing record length and subsequent reduction in influence of shorter-term variability on measured trends, satellite altimeter measurements sea level provide an opportunity to assess near-term rise. Here, we use gridded created from the network altimeters tandem with tide gauge observations produce observation-based trajectories rise along coastlines United States now until 2050. These are produced by extrapolating altimeter-measured rate acceleration 1993 2020, two separate approaches used account for potential impact internal future estimates associated ranges. The generate 2050 comparisons made model-based projections. It is found that altimetry near or above higher-end model projections contained recent assessment reports, although ranges still wide.