Posters
Come meet the poster presenters to ask them questions and discuss their work
We would like to invite you to come and see the posters at our upcoming conference. The posters will showcase a diverse range of research topics, and will give delegates an opportunity to engage with the authors and learn more about their work. Whether you are a seasoned researcher or simply curious about the latest developments in your field, we believe that the posters will offer something of interest to everyone. So please join us at the conference and take advantage of this opportunity to learn and engage with your peers in industry and the academic community.
PO409: Performance of a Stage 3 Floating Lidar System (FLS) during extreme storm conditions at an offshore site
William O’Brien, Green Rebel Metocean General Manager, Green Rebel
Abstract
Offshore measurement systems operate under harsh conditions, with storms providing a critical test of data quality and measurement reliability. Storm Floris, 4th – 5th August 2025, was a storm in the UK with an average wind speed of 29.6 m/s and a maximum instantaneous wind speed of 37.2 m/s. A Green Rebel Floating Lidar System (FLS) installed at the National Offshore Anemometry Hub (NOAH), operated with near perfect system and data availability during this storm using two ZX300 lidars. The buoy also captured wave, current and a full set meteorological conditions during the storm. Data covering three days before and after the storm captured pre-, during-, and post-storm conditions, providing a continuous record of offshore wind and sea state evolution. Parameters included wind speed and direction, wave height and direction, currents, water temperature, and buoy displacement. Observations from the FLS wave measurements indicated a drop in peak wave period during the storm, reflecting a shift from swell-dominated to locally generated wind waves. This change highlights how storm-driven wind–wave interactions can affect both the sea state and interpretation of wind measurements, with implications for offshore wind design and operational planning. Data quality indicators such as backscatter and Packet in average (PiA) were monitored to assess the robustness of redundant multi-height wind measurements. Despite the extreme conditions, both lidars maintained strong coherence, with wind profiles consistent across measurement heights. GPS tracking indicated the buoy remained within expected positional limits, demonstrating mooring resilience under storm forcing. The combination of multi-height wind data, wave and current observations, and GPS tracking provides a comprehensive view of FLS performance under storm conditions. These observations suggest that dual-lidar buoy systems can provide reliable wind data under challenging offshore conditions while capturing important environmental interactions, supporting offshore wind resource assessment and data driven decision-making.
