The waves of the Southern Ocean and the Ross Sea are largely unstudied. The New Zealand Defence Force (NZDF) routinely operates in these areas and is currently engaged in a shipbuilding program which requires a detailed understanding of the wave climate for sea-keeping analysis and ice-belt design.
Unlike other areas, the Southern Ocean and the Ross Sea have limited ship traffic and therefore limited wave observations from volunteer observing ships. Moreover, due to the difficult conditions and remote locations, limited scientific measurements of waves have been completed. In 2017, the NZDF deployed the first wave buoy in the open ocean south of 47oS anywhere in the world. In addition, 21 free-floating buoys were also deployed between 42oS and 67oS. This array has provided an understanding of wave characteristics across the Southern Ocean and the Ross Sea.
The data from these platforms have been used to optimise the WaveWatch III wave forecast model. The optimised setup is then used to create a 24-year hind-cast wave atlas for the ice-free areas south of 31oS.
In the presentation, this previously unpublished wave atlas for the Southern Ocean and Ross Sea will be presented. A limited comparison will also be made between the wave statistics from both wave-buoy observations and the wave atlas in these regions with the bivariate frequency wave height-period occurrence tables recommended for the North Atlantic by the International Association of Classification Societies.
Research Lead, Defence Technology Agency, New Zealand Defence Force
Sally Garrett was educated at Takapuna Grammar School in Auckland, NZ, and then obtained her Master of Science degree in Environmental Science at the University of Auckland in 2000 and, subsequently, a Postgraduate Diploma in Meteorology from Mississippi State University in 2009.
She began her career in 2000 as a graduate with the Defence Technology Agency in the New Zealand Defence Force, moving on to become a Research Scientist, then Environmental Lead in Environmental Science and, in 2016, Research Lead for the Defence Technology Agency. She is focused on increasing the safety and efficiency of sailors, soldiers and aircrew. Key areas of research include development of a safety software tool for amphibious operations, development of environmental requirements for future RNZN ships operating in the Southern Ocean and Ross Sea, and characterisation of the Southern Ocean and Ross Sea waves. She supported the New Zealand sailing team at the 2008 Olympic Games by collaboratively developing a tidal model for the sailing venue in Qingdao.
Sally is also a yachtswoman of note, was Commodore of Royal Akarana Yacht Club in 2016–17, Race Director for ANZ Sail Fiji in 2016, and is now a Member of World Sailing’s Sub-committee on Special Regulations.
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