Large Lakes Observatory

University of Minnesota, Duluth

Duluth, MN 55812

jaustin@d.umn.edu

 

Air temperature in the spring and summer tends to be higher than the surface water temperature (see plot below). In this case, the surface waters are warmed by the air (and the air is cooled, as residents of Duluth are aware of any time the wind blows off the lake). Later in the year, when the lake has warmed up and the seasons turn, the air will typically be colder than the water, and will cool off the water. ATWT

Here's what the sensor looks like; there's a small thermometer inside the vanes shown here; the vanes are to keep sunlight off the sensor, and to keep airflow over the sensor moving. Sorry about the odd perspective.

 

AT/RH

 

 

buoy

 

llo

 

me

 

capn

 

string

 

josh

 

anchors

 

lines

 

crane

 

 

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