This lesson incorporates techniques and experimental designs used by researchers during the Southern Ocean Diatoms PolarTREC expedition and during post-expedition laboratory analysis. This guided inquiry lesson provides students the opportunity to explore photosynthesis and primary productivity using techniques to measure chlorophyll levels.
1. Use models to predict chlorophyll levels in the global oceans
Understanding Physical and Chemical Parameters of Ocean Water Using CTD Profiles
A focus of the PolarTREC Southern Ocean Diatoms expedition was to collect water samples and physical profile data using oceanographic technology. Oceanographers rely on the real-time data transferred from the water column to the ship-based computers using a CTD sensor. The CTD measures conductivity (salinity), temperature and depth
This video was shot by Mike Etnier at Makanrushi Island, Russia in July 2008. This is underwater footage of one of several large schools of Atka mackerel that were feeding on krill at the surface. See "Atka mackerel and krill" for surface footage of one of the schools of fish and underwater footage of the krill. For more
This video was shot by Mike Etnier at Makanrushi Island, Russia in July 2008. There are several thousand Atka mackerel feeding on krill at the surface. See "Atka mackerel school" for under-water footage of one of the schools of fish. For more details on the feeding aggregation, and its relevance to our archaeology studies, read the journal entry