Lake Superior Underwater Optics

spotSpotlight On: Underwater Optics - the algae that form the base of the Lake Superior food pyramid grow only to the maximum depth of light penetration. Our ability to quantify primary production in the lake and its ability to support fish populations demands an understanding of the underwater light field. As light penetrates the surface, particles scatter and reflect the light back to the surface and algae, dissolved color (e.g. humic and tannic acids) and water itself absorb color. The various colors of the spectrum are disappear at different depths, first red, then yellow and finally blue and green. Scientists use a free fall hyperspectral scanner to measure the disappearance (attenuation) of light with depth in the water column.

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Preparing to launch the HHSP

Preparing to launch the HHSP

 

Preparing to launch the HHSP

Immediately prior to launch

 

Dr. Alan Weidemann, Faculty, of the Naval Research Laboratory, Stennis Space Center, Mississippi launching a device to compare data from satellites to what could be measured on location.

Dr. Alan Weidemann, Faculty, of the Naval Research Laboratory, Stennis Space Center, Mississippi launching a device to compare data from satellites to what could be measured on location.
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The device is used to compare data from satellites to what could be measured on location.

The device is used to compare data from satellites to what could be measured on location.

The device is used for 'ground truth' to compare data on the surface to that from satellites.

The device is used for 'ground truth' to compare data on the surface to that from satellites.

Mr. Tony Prestigiacomo, Researcher of the Upstate Freshwater Institute, Syracuse, NY, preparing to launch an optics measuring instrument

Mr. Tony Prestigiacomo, Researcher of the Upstate Freshwater Institute, Syracuse, NY, preparing to launch an optics measuring instrument
Click for Movie WMV 4 Mb
Click for Movie WMV Hi - res 8 Mb

Mr. David O'Donnell, Researcher from the Upstate Freshwater Institute, Syracuse, NY, checking the live data feed from the optics instrument.

Mr. David O'Donnell, Researcher from the Upstate Freshwater Institute, Syracuse, NY, checking the live data feed from the optics instrument.

 

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Civil & Environmental Engineering Department at Michigan Tech