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Cruise Info
| Cruise ID | NH1210 |
| Vessel | R/V NEW HORIZON |
| Title | Spectral Energy Dissipation in Broad-banded Wave Fields |
| Abstract | Spectral Energy Dissipation in Broad-banded Wave Fields: Two field experiments are proposed to make simultaneous remote and in situ measurements of energy dissipation rates in broad-banded wave fields. The experiments will expand incrementally from prior results measuring of narrow-banded wave fields. During the winter of year 1, a 10-day experiment on onboard the R/V Robertson (APL-UW) will be conducted in the Juan de Fuca Strait, WA. Conditions are expected to be moderate (wave heights less than 2 m), and the goal will be to test new measurement techniques prior to an open ocean experiment. The 10-day duration is sufficient to cover a range of wave and weather conditions, based on data from NDBC station 46088. During the autumn of year 3, a 20-day experiment onboard a UNOLS vessel will be conducted in the North Pacific Ocean. The duration is necessary to observe a range of wave conditions, including variations in wave age, which has a much larger range (0 to 10) in the open ocean than in semi- enclosed bodies of water. Wave heights up to 5 m are targeted for this experiment. The R/V Thompson at UW is requested to minimize shipping and logistical costs and shared ship time will be possible. Shipboard instrumentation from previous efforts on Lake Washington and Puget Sound will be redeployed, including a visual camera and sonic wave gage and Dopbeam beam velocity profilers, corrected for motion using a three-axis accelerometers. In addition, two new platforms, a wave- following float and a helikite aerostat, are proposed to support measurements in open ocean conditions. The new platforms are necessary to capture the larger spatial scales of open ocean waves, and have the added advantage of avoiding the hull-reflections common to shipboard measurements. |
| Starting Port | San Diego, California, USA |
| Ending Port | San Diego, California, USA |
| Starting Date | 2012-09-26 |
| Ending Date | 2012-10-15 |
| Principal Investigator | Thomson, James M. |