The document summarizes the construction and deployment of stress buoys as part of the SEDNA project to measure sea ice stress and movement in the Beaufort Sea. As a student, the author helped construct the stress buoys, which use magnetically plucked wires and changes in vibration frequency to measure external forces on steel cylinders from ice stress, wind, and air temperature. The author gained an understanding of the physics behind the buoys and the extensive preparation required for Arctic field research.
![Under Pressure: Construction and use of stress buoys in the SEDNA project Tess Mattraw 1 , Cathleen A. Geiger 2 , Jackie Richter-Menge 3 , Bruce C. Elder 3 1 Dartmouth College, Hanover, NH 2 University of Delaware, Newark, DE 3 Cold Regions Research and Engineering Laboratory, Hanover, NH 1. Abstract Constructing the stress buoys Inside the stress sensor Completed stress buoys Stress buoys awaiting deployment Deployed stress buoy 3. The Physics of Stress Sensors 5. Summary ,[object Object],[object Object],[object Object],1 3 2 Ice stress = F(cylinder strength, wire frequency, temperature) External forces (wind, air temps) Ice stress Force on cylinder wall Cylinder deforms 4. Deployment As a WISP student working at CRREL, my responsibility to the Sea-ice Experiment Dynamic Nature of the Arctic (SEDNA) project was to construct the stress buoys that would later be deployed in the Beaufort Sea to measure the stress and movement of the sea ice. I would also help with other preparatory tasks, such as testing GPS units and other field equipment and packing for the trip. In building the stress buoys, I came to a deeper understanding of the physics behind them. I also learned first hand about the extensive preparation involved in Arctic field research. From this I have been able to gain a greater knowledge of what goes on behind the scenes of scientific research. 2. Construction Schematic layout of the field program for SEDNA ea-ice xperiment: ynamic ature of the rctic International Polar Year 2007 Beaufort Sea S N A E D ICESat multi-year ice first-year ice Prudhoe Bay Field Program Overview Stress Sensor Buoy 1) Argos Antenna 2) Global Positioning System 3) Stress Sensor 4) Air Temperature 5) Barometer 6) Compass (inside housing) 7) Data Logger (inside) 8) Battery Pack (inside) (1) (2) (3) (4) (5) (6) (8) (7) Changes wire frequency Wire Stretches or loosens](https://image.slidesharecdn.com/wisp-poster-15062/85/wisp-poster-1-320.jpg)
