University of Alaska Fairbanks
Supporting Stations: McMurdo Station
Research Locations: Windless Bight
From 1976 to 1985, the Geophysical Institute at the University of Alaska Fairbanks operated an infrasonic array at Windless Bight on the Ross Ice Shelf. The area is unique for its very low wind levels, making it an excellent site for Antarctic infrasound detection. In 2001, a modern array was installed and has operated since then. Infrasonic waves are long-wavelength, low-frequency acoustic waves that are below the frequency range of human hearing. They can be detected on the Earth’s surface by an array of specialized microphones operating in the passband from 0.02 to 10 Hertz. Infrasound propagates with little attenuation over great distances from many different natural and man-made sources. Natural sources include volcano eruptions, winds over distant mountain ranges, large storms at sea, aurora, meteors, earthquakes and avalanches. Human-caused sources are large explosions. The installation at Windless Bight is part of the joint US and Comprehensive Nuclear Test Ban Treaty Organization Infrasound Array.
Field Season Overview:
Five participants will deploy and camp at Windless Bight. Support entails tracked vehicles, a small camp erected by Science Construction, fuel, and year around storage space. Over the winter, a contract Research Associate (RA) monitors and maintains the installation.
Deploying Team Members:
Jay Helmericks (Team Leader)