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Regular version of the site

Article

Influence of Very Large Spatial Heterogeneity on Estimates of Sea-Level Trends

Applied Mathematics and Computation. 2020. Vol. 386. P. 125485.
Shapoval A., Le Mouël J., Courtillot V., Shnirman M.

We propose a new method to estimate sub-decadal to centennial time scales of sea-level change. Since the coastal data exhibit large spatial heterogeneity and temporal variability, the global sea-level rate is estimated as an appropriate average of the rates observed at available locations and computed with sliding windows. We claim that under such heterogeneity the median serves as a better representative of an adequate average than the mean. With this approach, the sea-level rate in 60 to 70 yr windows over the past century is found to be smaller than 1.7-1.9 mm/yr. These upper estimates are in line with those obtained with a scarce list of available long quasi-gapless series