Comparison of Wind Speed and Wave Height Trends from Twentieth-Century Models and Satellite Altimeters
Alberto Meucci, Ian R Young, Ole Johan Aarnes, Oyvind Breivik
Journal of Climate | American Meteorological Society | Published : 2020
The trends in marine 10-m wind speed U10 and significant wave height Hs found in two century-long reanalyses are compared against a model-only integration. Reanalyses show spurious trends due to the assimilation of an increasing number of observations over time. The comparisons between model and reanalyses show that the areas where the discrepancies in U10 and Hs trends are greatest are also the areas where there is a marked increase in assimilated observations. Large differences in the yearly averages call into question the quality of the observations assimilated by the reanalyses, resulting in unreliable U10 and Hs trends before the 1950s. Four main regions of the world’s oceans are identi..View full abstract
Awarded by Research Council of Norway through the ExWaMar project
IRY wishes to acknowledge the support of the Integrated Marine Observing System (IMOS) in compiling and archiving the altimeter dataset. OB and OJA gratefully acknowledge the support from EU programme ERA4CS through the WINDSURFER project and the Research Council of Norway through the ExWaMar project (Grant 256466).