Case Study - 2017 Yampi Shelf Survey
Blue Ocean Monitoring
2017 Yampi Shelf Survey
In July 2017, Blue Ocean Monitoring undertook a calibration survey over a known seep just east of the Cornea Oil Field on the Yampi Shelf (Browse Basin) offshore Western Australia.
The glider was deployed approx 20 km east of the north-east tip of the accumulation.
In the following 15 days, it covered 438 line kilometres, (horizontal and vertical) before being recovered 30 km ssw of the field area.
During that period the glider was in continuous and fully autonomous operation and easily confirmed seep location as it recorded anomalous Methane readings (> 4 times background); the glider track is shown in black on the adjacent map and the anomalies are shown in yellow.
Download Technical Paper: Using Autonomous Underwater Gliders for Geochemical Surveys (Blue Ocean Monitoring; APPEA Journal 2018, 2Mb PDF)
Close-up of seep area; sea floor colour palette enhanced.
Methane Anomalies (upper image): size proportional to Methane. All background readings filtered out. Colour scaled to temperature - largest anomalies also the warmest - closest to seep?
Crude oil in water (bottom image): anomaly size proportional to detected level of crude oil. Samples in lowest 70% of fluorescence and lowest 50% of particle size filtered out. Colour scaled to temperature.