Time-Series Plots

Time-series plots of selected data from all sites, and from supporting data are provided below as an overview of the observations. Plots show the measured data unfiltered. Most plots contain the time series of significant wave height along the top panel for intercomparison. Because the instrumentation at each site was not identical and some instruments failed, some plots do not contain data from every site. In plots where there are multiple platforms at one site, an "s" indicates surface buoy, an "m" stands for micropod or minipod, and an "f" indicates Flobee tripod.

Plot Types

• Meteorological observations
• Salinity and temperature observations
• Water-flow observations
• Pressure observations
• Surface-wave observations
• Acoustic Doppler velocimeter (ADV) water-flow observations
  
• Pulse-coherent acoustic Doppler profiler (PCADP) water-flow observations
  
• Acoustic backscatter sensor (ABS) observations
• Animation of sonar data

Meteorological observations: Wind speed (meters per second), wind direction (degrees clockwise from true north), air temperature (degrees Celsius[°C]), and barometric pressure (hectoPascals) from National Oceanic and Atmospheric Administration (NOAA) National Data Buoy Center (NDBC) buoys 44025 and 44065 and the USGS meteorological buoy at site 2 are shown.

NOAA NDBC Moored Buoy 44025 & 44065, & USGS Meteorological Buoy

Salinity and temperature observations: Sea-water temperature (°C), conductivity (siemens per meter [S/m]), and salinity (practical salinity units [psu]) are shown at all sites. Surface-buoy observations were collected at the surface. Tripod observations were made near the bottom. Significant wave height is also included to provide an indication of wave energy.

Water-flow observations: Unfiltered water-flow observations (cm/s) at individual sites are shown at the surface and at the bottom. Observations are from TRDI's Workhorse ADCPs and Nortek AWACs. At all sites, the surface is the upper-most bin at which measurements were not greatly affected by waves or tides. Significant wave height is also shown to provide an indication of wave energy.

Pressure observations: Unfiltered pressure observations are shown at individual sites. Pressure (Pascal [Pa]) measured by ADCP is shown in panel 2. Pressure (decibar [dbar]) measured by an AWAC or Seagauge is shown in panel 3. Pressure (millibar [mbar]) measured by a Paros pressure sensor that was attached to an ADV or PCADP is shown in panel 4. Significant wave height (m) from each site is shown in panel 1 to provide an indication of wave energy.

Surface-wave observations: Water level (m), significant wave height (m), peak wave period (s), maximum wave height (m), mean wave period (seconds [s]), and peak wave direction from which waves are propagating, measured clockwise from north, are shown at individual sites.

Acoustic Doppler Velocimeter (ADV) observations: Unfiltered distance of measurement location above the sea floor (m), water flow (cm/s) and the standard deviation of water flow (cm/s), near the sea floor. All observations are from Sontek ADVs. Significant wave height (m) from each site is also shown to provide an indication of wave energy.

Pulse-Coherent Acoustic Doppler Profiler (PCADP): Unfiltered distance from the sea floor (m), water flow (cm/s), and the standard deviation of water flow (cm/s) near the sea floor is shown. All observations are from Sontek PCADPs. Significant wave height (m) from each site is also shown to provide an indication of wave energy.

Acoustic Backscatter Sensor (ABS) observations: Burst-mean statistics calculated from ABS data at sites 1 and 2. Statistics include the burst-mean for the three ABS transducers. For the ABS data, both pdf and png versions are provided. (Please note that because these figures are complex, the pdf version may load slowly.)

Animation of Sonar Data: The changing condition of the sediment bed at the Site 1 Minipod can be viewed as animation using a media player that supports .avi files. In the top panel of the animation, backscatter intensity of the sediment bed is shown in the grayscale image. The orientation of the cyan arrow indicates the wave direction, whereas the magnitude of the cyan arrow indicates the estimate of sea-floor ripple wavelength. This magnitude has been multiplied by five for visual purposes. The bottom panel shows significant wave height at the Site 1 Minipod. The red dot in this panel coincides with the time provided in the image in the top panel.