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ES2206  Seasonal Changes in Oxygen Levels

The map below shows average oxygen levels in milliliters per liter (ml/l) at a depth of 100 meters below the surface. The depth of the dead zone ranges from about 18 to 180 meters.

  !   Click the buttons to see oxygen levels for each season. Examine the maps and the color code to interpret how oxygen levels changed through the year. Focus on changes in the Gulf of Mexico.


1. Examine the maps of mean oxygen levels throughout the year. Describe any patterns you see.

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