Investigating the Ocean: Exploring ecological provinces using satellite imagery and oceanographic cruise data

In this activity, students are split into groups and assigned different ocean regions. These include the Arabian Sea, Equatorial Pacific, North Atantic, and Southern Ocean. Each group uses Google Earth to view NASA satellite chlorophyll imagery and the cruise track of data collected as part of the U.S. Joint Global Ocean Flux Study. At three locations along each cruise track, chlorophyll-temperature-depth (CTD) and bottle data collected as part of the study can be downloaded. Students work with the data to identify oceanographic features as a function of depth and then make simple calculations.

In the second component of the exercise, monthly mean chlorophyll a satellite imagery is also included and students speculate about the annual cycle of physical and biological processes based on that time series. Students compile the results into a presentation for the class. Each group should have different responses to the questions asked and different results for the calculations because each ocean region is very different. This easily leads into a discussion about the major ecological provinces of the ocean and what factors cause variability.