Background
Preliminary MetOcean data was required to support the development of a new wind farm in the Taiwan Strait.
Scope of work
CA Metocean was appointed by StormGeo Norway to provide MetOcean data at four locations in the area. Deliverables included monthly and all-year cyclonic and non-cyclonic extreme data, as well as all-year and monthly non-cyclonic fatigue data.
Key features
- StormGeo provided fine scale waves (3x3km) and winds (1x1km) for each location of interest, which were used in conjunction with the ECMWF ERA5 data in the area to reconstruct 43-years long time series of waves and winds at each location of interest:
- Using StormGeo’s data as the “propagated” data and the ECMWF ERA5 as the “offshore” data, interpolators for each location of interest were calculated using Radial Basis Functions
- Several combinations of offshore data were tested to find the best set of interpolators
- Using the interpolators calculated from the overlapping years of data (12 for the winds and 2 for the waves), the re-constructed timeseries at each location of interest was calculated for the 43-years long period covered by the ERA5 data
- Once the time series were reconstructed, they were cross-checked with other hindcasts to ensure consistency; then cyclonic data was identified and removed from the hindcast, lastly non-cyclonic results were derived.
- Cyclone extremes were derived using IBTrACSv04 data and Willoughby parametric model. The cyclonic wind fields were derived and the maximum wind speed at each location of interest due to each cyclone affecting the area between 1990 and 2021 was calculated.
