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How Deep are Earth's Oceans?
Using satellite measurements, researchers from the National Oceanic and Atmospheric Administration (NOAA) National Environmental Satellite, Data and Information Service and Woods Hole Oceanographic Institution (WHOI), Department of Marine Chemistry and Geochemistry, have come with up with a new ocean volume figure. The study’s calculation of the ocean’s mean depth is 3,682.2 meters, which is 21 - 51 meters less than previous estimates. The volume of the Earth’s oceans are now estimated to be 1.332 billion cubic kilometers. Advances in measurement techniques have allowed scientists to more accurately account for undersea mountains and other formations.
Learn more about this research and oceanography:
- Sea Floor Mapping Movies (NOAA)
- Mountain in the Sea Exploration: Big Fleas Have Little Fleas! (NOAA) Grades 7-8 Life Science Lesson Plan - PDF
- Exploring the Inner Space of the Celebes Sea - Staying Up (NOAA) Grades 7-8 Life Science/Physical Science Lesson Plan - PDF
- Deepwater Coral Expedition: Reefs Rigs, and Wrecks (NOAA) Grades 9-12 Physical Science Lesson Plan - PDF
- Coral Reefs Poster (NOAA) - PDF