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Essential principles about our ocean


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Essential principles about our ocean

  1. 1. Essential Principles1. One big ocean with many features2. The ocean and life in the ocean shape the features of the earth3. The ocean is a major influence on weather and climate4. The ocean makes Earth habitable5. The ocean supports a great diversity of life and ecosystems6. Oceans and humans are inextricably interconnected7. The ocean is largely unexplored
  2. 2. One Big Ocean 70% of planet surface Size and shape determined by plates Single interconnected circulation system driven by wind, tides, Coriolis, Sun, and density differences Sea level changes with tectonics, ice cap melting, and water warming (expansion) 97% of water on earth is in ocean Integral part of global water cycle Connected to all major watersheds Although large, is finite and resources are limited
  3. 3. The ocean shapes the features ofthe Earth Many earth materials and geochemical cycles originate in the ocean Sea level changes over time shaped land surface Erosion occurs in coastal areas as wind, waves, and currents in rivers and ocean move sediments Sand consists of tiny bits of animals, plants, rocks and mineral eroded from land sources or by waves that also redistribute Tectonic activity, sea level changes, and waves influence physical structure and landforms of the coast
  4. 4. The ocean is a major influence on weather Absorbs most of solarradiation reachingearth Most rain on land wasoriginally evaporated from the tropical ocean Half of global primary productivity occurs in the ocean The ocean has a significant influence on climate change by absorbing, storing and moving heat, carbon and water Changes in ocean circulation have produced large, abrupt changes in climate in the last 50,000 years
  5. 5. The ocean makes Earth habitable Most of oxygen originally came from ocean Earliest evidence of life is found in the ocean
  6. 6. The ocean supports a great diversity of life and ecosystems Diversity of major groups of organisms is much greater in the ocean The ocean provides unique examples of life cycles, adaptation etc. not seen on land The ocean is 3D with most of living space on earth Oocean habitats are defined by environmental factors with patchy distribution of ocean life Tides, waves, and predation cause vertical zonation in the shore Estuaries provide important and productive nursery areas
  7. 7. Oceans and humans areinextricably interconnected The ocean affects every Human life by supplying water, moderating climate, influencing weather, and affecting human health The ocean provides food, medicine, mineral and E resources, jobs, national economy, highway for transportation, and plays role in national security; The ocean is a source of inspiration, recreation, rejuvenation and discovery, plus an element of cultural heritage Most of population lives in coastal areas Humans impact ocean in a variety of ways (laws, development, pollution, overfishing) Coastal regions are susceptible to natural hazards; Everyone is responsible for caring for the ocean
  8. 8. The ocean is largely unexplored less than 5% has been explored; use of ocean resources has increased significantly in last 40 years and future sustainability depends on our understanding of those resources; new technology is expanding our ability to explore the ocean; ocean exploration is truly interdisciplinary and requires close collaboration among biologists, chemists, climatologists, computer programmers, engineers, geologists, meteorologists, physicists and a new way of thinking