Research Equipment Used on Crater Lake
A CTD sensor package.
The CTD Profiler is a continuous water quality sensor that is lowered from the boat to the lake bottom at 580 meters. The CTD measures water temperature, depth, salinity, particle density, and chlorophyll concentration.
A Secchi Disk in Crater Lake.
The Secchi Disk is a flat plate that is lowered into the water column from a boat. The secchi disk is used world-wide as a quick and reliable indicator of the clarity of a lake.
A Van Dorn water sampler being lowered into Crater Lake.
The Van Dorn is a water sampler that is lowered into Crater Lake. Multiple Van Dorns collect water samples from eleven depths during July, August, and September.
A sediment trap being readied for sampling in Crater Lake.
A sediment trap has collected falling particles in Crater Lake for thirty years. The sediment trap was last used during the summer of 2013.