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A comparison between four different wind-wave hindcasts computed by forcing the WaveWatch III model

For those who faced with selection of an appropriate atmospheric forcing to generate wave hindcast at global or regional scale this description goes out.

Datasets

We performed four long-term (1980-2019) wind-wave hindcasts based on ERA5, CFSR, MERRA2, ERA-Interim atmospheric reanalyses:

Boundary conditions	Source	Spatial Resolution (lat x lon)	Wave hindcast	Component
ERA5	ECMWF	0.25° × 0.25°	ERA5-WW3	Hs
CFSR	NCEP	0.312° × 0.312°	CFSR-WW3	Hs
MERRA2	NASA	0.5° × 0.625°	MERRA2-WW3	Hs
ERA-Interim	ECMWF	0.7° × 0.7°	ERAi-WW3	Hs

We simulate significant wave height for the 40 year period (in WaveWatch III model output abbreviation is Hs).