Yesterday, we set Hal (a profiler, which has probes attached to it to monitor oxygen saturation levels within the algal mat) back into the lake to get to work. We left him at about 10:30 pm and all was well. He worked GREAT until about 6:00 this morning at which point, well.... he stopped! So, I dove again to retrieve him. It turns out that one of the problems is that he is moving laterally as well as vertically and as of this point, no one has told him to move laterally. Thus the name "Hal." Apparently, in the movie "2001: A Space Odyssey," there is a computer named Hal that takes on a life of its own. Our "Hal" took on a life of his own when he was first assembled a couple years ago - thus the name "Hal." He is living up to his name! The lateral movement is an easy thing to fix; we simply have to change a setting on the Hal's frame. The adjustments are being made, Hal will be re-launched tomorrow, and hopefully all will be well!
A data challenge: Knowing that the probe that is currently on Hal is measuring oxygen levels, and that the probe (in this data set) has moved down into the algal mat, what do you think the data seen in this picture is showing? Can you sort it out? (there are no axis labeled - challenge on!)
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Data from Hal
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Hilke begins to assess the data that Hal is collecting.
Here is an attempt to show you what it is like to walk across the smoother parts of the lake ice. See what you think!
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Parting picture:
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The Canada Glacier and part of the Lake Hoare Camp.
You can also check out my journals and pictures from previous seasons at: http://www.ryejrhigh.org/ellwood