DevCoCast ocean colour products from the Mozambique Channel

Using an example from the Mozambique Channel this lesson shows how different ocean colour sensors and algorithms may obtain different chlorophyll concentrations from the same satellite measurements, and how to choose the most appropriate product.

The lesson looks at the differences between algorithms for use in turbid coastal waters (case 2) and algorithms designed for the open ocean (case 1). By the end of these lessons you should be able to:

• Understand the difference between Case 1 and Case 2 water.
• Compare different chlorophyll products and understand the reasons for differences between them.
• Use flags and ancillary information about a region to determine which chlorophyll product is most suitable.
• Use flags and ancillary information about a region to determine which chlorophyll product is most suitable.

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Screenshot from the lessons showing the Case 1 chlorophyll product, with no flags applied (left), the N1 data format, flag descriptions and the formula used to apply land and cloud masks (middle), and the result of applying these flags (right).