Changes in sea volume

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  • Changes in Sea Ice Volumes
    • Isostatic Change
      • When the sea levels change due to rising or sinking of land
      • Local sea level change
      • If land rises, sea level falls
      • More water stored as ice on land will cause the land to sink and therefore the sea levels may appear to rise
    • Eustatic Change
      • Change in sea level due to volume of water
      • Always a global effect
      • As ice melts, the volume of water in the sea increases.
      • Can also be caused through change in shape and size of an ocean basin
        • Caused by tectonics.
        • If the basin becomes larger the volume of the ocean will increase but the overall sea level will fall

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