The document describes the quality of the Delayed Mode Multi-Year (MY) WAVE product delivered by the Copernicus Marine Service In Situ Thematic Assembly Centre (In Situ TAC).

This document applies to the product INSITU_GLO_WAV_DISCRETE_MY_013_045 described in Copernicus Marine Service Catalogue.

This product integrates observations aggregated and validated from the Regional EuroGOOS consortium (Arctic-ROOS, BOOS, NOOS, IBI-ROOS, MONGOOS) and Black Sea GOOS as well as from National Data Centres (NODCs), JCOMM global systems (OceanSITES, DBCP) and the Global telecommunication system (GTS) used by the Met. Offices. The In Situ TAC relies on observing systems maintained by institutes that are not part of the In Situ TAC, and Copernicus Marine Service is not contributing to the maintenance and setting up of the observing systems it uses.

The Multi-Year WAVE product is a global product and provides two kinds of files: one with integrated parameters, with the string “TS_MO” in the filename (TS: Time Series, MO: Mooring), computed from the wave spectrum (e.g. significant wave height, peak period, mean direction) or zero crossing parameters (e.g. maximum wave height, mean height) and another one with the string “WS_MO” in the filename (WS: Wave Spectra, MO: Mooring) with the spectral information (scalar spectrum and directional functions like mean direction and angular spreading depending on the frequency). The files with integrated parameters contain also other physical and meteorological variables measured by the same platform. The complete list of variables distributed by the In Situ TAC can be found in the Copernicus Marine In Situ TAC physical parameters list (https://doi.org/10.13155/53381). Each file contains only the wave parameters provided by the platform which is a subset of the complete list of wave parameters.

The Production Unit performs the wave validation in a centralized way twice a year, then the product is assessed through the metrics described in Section IV (Validation Results) and the final wave product is distributed in the dedicated product mentioned above.

Since December 2020, files with wave spectra are included in the Multi-Year WAVE product. Since 2023, hourly data is delivered in a dedicated dataset: cmems_obs-ins_glo_wav_my_na_PT1H.