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Coming Home to Daddy

06/14/2010, 12:58 PM by Lollie Garay
Can you see POGO?<br/><br/>Credit: Lollie Garay
Can you see POGO?
Photo Credit: Lollie Garay

June 14
Lat/Long: 10.04N 054.586W
Air Temp: 28.3C 82.9F
Surface Temp: 29.36C 84.85F
Salinity: 29.77psu

BACK HOME TO DADDY

Guest post by Dr. Joachim Goes

"Late last night after winding down operations north of French Guiana , we set sail to recover POGO (Physical Oceanographic & Geochemical Observer), our autonomous profiling float that was dropped under a large bloom of DDA’s (the symbiotic diatoms/ diazatrophs) encountered at Lat 10.25 and Long. 54.44, way north of the coast of Surinam.

POGO was programmed to dive from the sea surface to depths of 1000m, collecting data on conductivity, temperature and oxygen. The float was also set to profile chlorophyll fluorescence and particle backscattering and then beam it to our shore laboratory once a day.

Our goal is to use POGO’s high resolution data on salinity, temperature and oxygen to identify specific conditions that promote DDA growth and its accumulation to bloom proportions."

The retrieval was a success! Looking at the float from my vantage point on the uppermost deck, the only thing showing above the surface was the transmitter antenna.(talk about finding a needle in a haystack!) The Knorr was skillfully positioned alongside the POGO by 2nd Mate Jen Hickey, with crew members ready with grappling hooks and a net to capture it on the starboard side.

Joachim told me later that 5 years ago we could not have done this- advancements in technology make this type of operation possible!

Lollie

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Question of the Day

  • Do the bacteria in the water make us sick?

    Only a few of them.  Bacteria are in every habitat on Earth, growing in soil, hot springs, radioactive waste, water, as well as in organic matter and the live bodies of plants and animals. Bacteria recycle nutrients, with many steps in nutrient cycles depending on these organisms, such as nitrogen fixation.