We begin today with a new great product provided by our NAVO partners. Below we see oil forecast combined with NAVO Seaglider and drifters. The drifters show the presence of the eddy, which is pulling some of the oil south along the edge. The majority of the oil is spreading out along the Lousiana coast. The NAVO partners have now also made the optical backscatter data available to complement the CDOM data. The backscatter data shows a high degree of complexity. There is enhanced backscatter in surface waters that are associated with some subsurface layering. More impressive are the high complexity seen at depth and the nepheloid layers are dramatic. These features are 100s of kilometers large. What they reflect is a large question. The CDOM does show some subsurface layering which consistent with the backscatter. I would interpret this as locally produced by the enhanced phytoplankton in the surface waters. The CDOM levels remain high at depth however the subsurface waters show none of the complexity seen in the backscatter. Great new products from the NAVO team!
The iRobot/APL continues it high resolution survey. The glider is well situated with the projected oil plume. The system is well stratified, with enhanced chlorophyll and enhanced oxygen associated with phytoplankton. The CDOM continues to show high degree of complexity in the mesopelagic and in the bottom waters there are spikes at depth. Oxygen shows depressions at the mesopelagic CDOM maxima.
To the south the SAM and RU21 make good progress. Weather constrained deployments today, so the next day will offer the next set of glider deployments by the Mote team. SAM shows a stratified system, with enhanced particles at the pycnocline and in a bottom nepheloid layer. The bottom layer shows dramatically “brighter” backscatter. Chlorophyll values are highest at depth. CDOM values are highest at depth.
RU21 shows good progress as we are making the break to the East. This is promising. As we are heading to the east, the pycnocline has been shallowing. We had turned off some sensors as a precaution in case we got pulled west, but feeling positive tonight the sensors are back on. The SAM and RU21 southern contingent will expand tomorrow. Therefore except for the shallowing pycnocline no other major data updates. More updates tomorrow.