Data sources and variables
The app accesses curated, validated datasets hosted on the Oceanum Datamesh. Data are served directly to the analysis engine — no manual download or pre-processing is required.
Data sources
Section titled “Data sources”| Variable | Source | Period | Model / dataset |
|---|---|---|---|
| Waves (global) | Oceanum | 1979 – present | WAVEWATCH III 6.07 spectral wave model forced by ERA5 winds and sea ice (ECMWF). 0.5° resolution (~50 km), 3-hourly. Validated against Jason-2/3 and Sentinel-3 altimeters. |
| Waves (regional) | Oceanum | Varies by region | High-resolution SWAN nested models for multiple regions worldwide (e.g. 5 km parent + 1 km coastal domains). ERA5-forced with tidal currents and spectral boundaries from the global WW3 model. |
| Wind | ECMWF | 1940 – present | ERA5 global atmospheric reanalysis. 10 m wind speed and direction at ~31 km resolution, 1-hourly. |
| Currents | Copernicus | 1993 – present | GLORYS12 global ocean reanalysis (Mercator Ocean / CMEMS). Surface current speed and direction at 1/12° (~8 km) resolution, daily. |
| Air temperature | ECMWF | 1940 – present | ERA5 2 m air temperature global reanalysis. ~31 km resolution, 1-hourly. |
| Sea surface temperature | Copernicus | 2021 – present | OSTIA SST — Met Office L4 NRT blended satellite and in-situ observations (CMEMS product). 0.05° resolution (~5 km), daily. |
All wave datasets are produced using third-generation spectral wave models and are calibrated against independent satellite altimeter observations. ERA5 and GLORYS12 are globally recognised reanalysis products routinely used for engineering, environmental and scientific applications.
The full list of available regional wave hindcast datasets is at datasets.oceanum.io.
Variables supported
Section titled “Variables supported”- Waves — significant wave height, wave period (Tp, Tm01, Tm02), wave direction, and sea/swell partitioning where spectral data are available.
- Wind — wind speed and direction.
- Currents — surface current speed and direction.
- Air temperature - 2m air temperature.
- Sea surface temperature (SST) - sea surface temperature.
Analysis capabilities
Section titled “Analysis capabilities”| Capability | What it does |
|---|---|
| Summary statistics | Mean, maximum, percentiles and descriptive statistics by directional sector. |
| Monthly / seasonal statistics | Statistics grouped by month and season to identify variability and seasonality. |
| Directional analysis | Wave, wind and current roses, directional bins and distributions. |
| Non-exceedance analysis | Probability that a variable remains below selected thresholds, monthly and annual. |
| Return period extremes | POT-based extreme value estimates for user-selected return periods (e.g. 1, 10, 100 yr). |
| Workability / persistence | Windows where multi-variable conditions remain within user-defined criteria. |