June 2024 OES Beacon

Decade of Ocean Science in the CWTM 2024 Workshop

Mal Heron and Weimin Huang, Co-Chairs of the CWTM 2024 Workshop

The Thirteenth Currents, Waves, and Turbulence (CWTM) Workshop was enhanced by support from the OES Ocean Decade Initiative (ODI) Ambassador Program under the guidance from Ambassador Mal Heron. The co-chair for the Workshop was Weimin Huang who is also Chair of the CWTMA Technology Committee.

Mal Heron, Jacob Davis, Brendan Henley and Weimin Huang at the DOS awards presentation.

Two student delegates were awarded ODI Scholarships to help their registration and travel costs to the CWTM Workshop. These were judged on their scientific innovation, their presentation and their alignment with the Decade of Ocean Science. Jacob Davis, from the University of Washington Applied Physics Laboratory, received an award for his paper “Multiscale measurements of hurricane waves using buoys and airborne radar.” Jacob combined air-deployed microSWIFT (UW-APL) and Spotter (Sofar) buoys together with the Wide Swath Radar Altimeter (WSRA), which flies aboard a NOAA Hurricane Hunter P-3. The mean square slopes measured by the two instruments were used to infer the high frequency tail of the wave spectrum, which is important for understanding wave-induced stress in hurricanes.

Brendan Henley, from Rutgers University, received his award for “Determining the seasonality of oceanic eDNA source waters.” Brendan used HF radar surface current data to estimate the seasonal movement of eDNA (environmental DNA) in coastal waters during 24-hour periods and beyond. These are early results in a technology that will provide impact assessment of fish species near off-shore infrastructures.

The panel session on the Decade of Ocean Science for Sustainable Development (DOOSFSD) was convened by Mal Heron. Mal’s introduction pointed to the community awareness and educational successes of DOOSFSD, but he emphasised that it is the task of organisations like OES to promote and apply science and technology to the aims of the Decade of Ocean Science. Four speakers were invited to speak to the four main topic areas of the CWTM Workshop.

The DOS panelists Weimin Huang, Eric Gill, Mal Heron, Michelle Barnett and Jim Thomson.

Michelle Barnett, from Sonardyne, showed how ADCPs (Acoustic Doppler Current Profilers) contribute to a productive, healthy and resilient ocean for example in offshore renewable energy as well as in offshore aquaculture. The use of ADCPs continues to grow world-wide.

Jim Thomson, from the University of Washington, outlined the dramatic increase in the number and type of buoys that we have been experiencing, and are likely to see this continue into the future. “More buoys, more science” was Jim’s leading line. He also made the point that many buoys are decreasing in cost and are therefore more likely to be the technology of choice for developing countries and small island states.

Eric Gill, from Memorial University, made the point that innovation and improvement of technologies also needs sustainable development during the decade. HF radar has a special place in current monitoring because of the unique spatial and temporal coverage. Eric spoke of the challenges like tsunami detection, search and rescue operations, ship tracking and tracking of buoyant pollution.

Weimin Huang, from Memorial University, addressed the contribution of X-band radars to the Decade of Ocean Science. X-band radars on ships and at coastal locations provide data on currents, waves, and wind as well as being the basic navigational aid. During this decade, X-band radars will be used routinely for predicting individual wave amplitudes – which should mitigate the impact of rogue waves at sea.