Eric D'Asaro  
   Principal Investigator

   Craig Lee  
   Co-Principal Investigator

   Jason Gobat  
   Co-Principal Investigator

   Mike Ohmart  
   Senior Field Engineer

   Eric Rehm  
   Predoctoral Research Associate

   Amanda Gray  
   Engineer IV

   Geoff Shilling  
   Engineer IV

   Adam Huxtable  
   Engineer III



Oceanography graduate students Eric Rehm and Amanda Gray were involved in nearly every aspect of the experiment. They prepared the instruments for deployment, piloted them during the cruises, and presented and distributed all of the results. Their theses are based on data analyses from the experiment.

Amanda Gray

Gray is tying together float and glider observations with satellite and hydrographic data to examine the physical processes surrounding a seemingly stationary phytoplankton patch. At one point the float became caught in an eddy and traveled around its edge. Data from the float and a Seaglider show that one side of the eddy had a patch of high chlorophyll fluorescence, and the other low.
  • Why did the phytoplankton not spread or advect in a filament?

  • Was it renewal of nutrients through heightened vertical mixing on that edge…

  • or were phytoplankton on the downstream edge being subducted out of the euphotic zone?
Stitching together the disparate data from autonomous platforms, shipboard sampling, and satellite imagery, she hopes to create a coherent view of the eddy's physical environment.

Eric Rehm

Rehm, by studying measurements of the fine spectral variations in the color of light in water, can estimate the size and taxonomic structure of the phytoplankton community during the course of the bloom. This is possible because small phytoplankton absorb light differently than large ones. The 50-day record from the float is rich, but he hopes a similar system is deployed over decadal time scales so that the timing of the bloom and temporal evolution in the phytoplankton size structure can be observed for any impacts due to climate change. Such phenological measurements are standard in the terrestrial studies of primary production, but rare in the marine environment.