Large Lakes Observatory

University of Minnesota, Duluth

Duluth, MN 55812

jaustin@d.umn.edu

 

Wind speed and direction are among the most important meteorological parameters that determine the behavior of lakes. Wind plays three major roles: It drives currents, it stirs up the water, and it mediates heat exchange. It also drives surface waves, which is perhaps the most noticeable of its effects!

windspeed

 

We measure wind velocity with a sonic anemometer, which is a really clever device that uses sound travel time between very small transducers (combination speakers/microphones) to determine the wind velocity. We also have a compass that tells us which way the buoy is facing so that we know the true direction of the wind. Here's what one looks like (sorry for the odd perspective).

anem

 

buoy

 

llo

 

me

 

capn

 

string

 

josh

 

anchors

 

lines

 

crane

 

 

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