Change Date: 16-Jan-2017
The March mean maximum directionally resolved wave power is derived from the CAWCR global wave hindcast, using data from the archived hourly 4¿ Australian grid, using March data from March 1980 to March 2010.
The directionally resolved wave power propagating in direction 0, J0, can be calculated by resolving the wave power of each component in direction 0. An equation describing its calculation can be found in the the atlas report (Hemer et al., 2016).
J0 is determined at for 0 at 15° intervals, and the maximum directionally resolved wave power, Jm, represents the maximum time-averaged wave power propagating in a single direction.
Note, accurate determination of J0 and Jm require spectral data, which was not archived at all grid points of the CAWCR wave hindcast. These data provide estimates of Jm whereby spectra are reconstructed using archived gridded wave partition data, with a Pierson-Moskowitz spectra fit to each partition, with assumed spreading, and superimposed to produce a reconstructed spectra. For consistency in this estimate, the omnidirectional wave power is determined from the reconstructed spectra, and not the archived CgE presented elsewhere. Further details of the method used to estimate Jm are provided in the atlas report (Hemer et al., 2016).
For further information on the CAWCR wave hindcast, see Durrant et al (2014)**. See DAP entry http://dx.doi.org/10.4225/08/523168703DCC5 for 1979-2010 data. Please note that the licensee/user is required to acknowledge the source of this data on the following terms: 'Source: Bureau of Meteorology and CSIRO © 2013'. Apart from dealings under the Copyright Act 1968, the licensee shall not reproduce (electronically or otherwise), modify or supply (by sale or otherwise) this data without written permission. Please contact us for more information.