Amy, a co-worker/friend, in Goldstream Bill Lake ( close to the University), with a Temperature Probe she built It was partially constructed with an exhaust pipe. The temperature probe goes into the sediment. There are temperature logger at the sediment-water interface, 1 and two meters deep in the sediment, and 0.5 –1m above the sediment. It gives information about the temperatures at which methanogenic bacteria (bacteria that produces methane) are active, the temperature they can whithstand or go dormant and then go back to activity.
Less complicated: a nice hole in the ice I needed 15 mn to open. Hey, it’s cold and deep. We used this water to pour on the transects we study (1m x 50m sections on lakes, where the snow is shoveled) to have a better visibility and see the methane bubbles.