Category Archive

Data from CTD+F casts have now been processed.  Casts were made from a small boat on dye release days.  The CTD+F setup included a Seabird CTD and WET Labs single-channel fluorometer.  Casts were generally made from near the surface to the bed. Below is an example of mean dye and temperature profiles from 6 May, 2012. Data are now available … Read More

All the Wirewalker data has now been processed.   Below are plots for WW1 deployment 2 and WW2 deployments 1 & 2.   Note in the plots below that the dark cross-hatched areas are times when the WW data is bad.   See the previous post for the map of the WW locations. WW1 Deployment 2 WireWalker 2, deployment 1 WireWalker 2, deployment … Read More

We now have our first look at the wirewalker (WW) mooring observations.   The wirewalkers use the up and down motion of the sea-surface to move a CTD+fluorometer profiling package up and down the water column.   As such, good vertical and tempral resolution of the watercolumn can be acheived with a single sensor.    During RIVET-I, we deployed 2 WW in … Read More

Animation of “dye” concentration from New River Inlet on May 11th 2012. Dye concentration is derived by differencing measured light at two wavelengths and is indicated by the black color. Dye is released in a single bomb up the inlet ~500 m from the junction with the inter-coastal waterwaterway (ICW). It propagates downstreamon the ebb tide. Unlike previous releases, the … Read More

We’ve also gotten the May 8th dye movie put together. Check out the youtube video or the link to the .mov file below. The dye qualitatively behaves similar to on May 7th (see previous post). However, the dye does not get advected as far downcoast.   However, there are a number of coherent structures clearly visible in the dye field.    The … Read More

REMUS operations starting ~1.5 hours before max ebb were conducted during the 5/19 and 5/20 dye releases.  Conditions were rough during the 5/19 mission outside of the inlet and no dye was visible during REMUS ops.  However comparison plots of river Colored Dissolved Organic Matter (CDOM) versus Rhodamine concentrations show that the dye was present, just at low concentrations (~0.5 … Read More

The dye release on Sat 19 May was interesting.    30 gallons of dye were released for 5 hours starting at 0430 (AM!) in approximately 10 m water depth a few meters (3-4 m) above the bed between buoy #6 and #8 in the channel   Dye went up the inlet towards the ICW on the flood.    Dye that had reached … Read More

Here is another aerial image to complement those posted earlier by Falk.  This photograph shows some very cool eddies, and it is also a great illustration of how thin the surface layer of dye was to the SW of inlet.  The dye-free streak on the right side of the photograph was left in the path of our dye sampling WaveRunner.

Today (Sunday May 13th) is instrument turnaround day and general catching up.    We also have a report on the dye-bomb release we did on May 11th.   In short, it was an amazing dye of observing the ocean.     The RIVET community had many assets in the water measuring dye, currents, temperature, and salinity.   Here we’ll focus on a … Read More

The dye release yesterday (May 8th) was very interesting.   The dye release was initiated shortly after slack tide as the water started ebbing.   30 gallons of Rhodamine WT were released in 2:24 min.   As usual the mounted instruments,  the jetskis, NPS/RSMAS crew, REMUS, towed ET array, and the Partenavia were all measuring the dye plume.   At first, as the tide … Read More