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  2. 2010

Ice Cores

Ice cores have many different looks
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Ice ready for visual stratigraphy<br /> <br /> Photo: J.P. Steffensen
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Ice ready for visual stratigraphy

Photo: J.P. Steffensen

  • The length of each core is carefully logged<br /> <br /> Photo: Kenji Kawamura
  • A freshly drilled core of several meters length<br /> <br /> Photo: Kenji Kawamura
  • Loose ice crystals are removed<br /> <br /> Photo: Tim Burton
  • Photo: Wang Shimeng
  • In a certain depth interval - the 'brittle zone' - the ice is very fragile<br /> <br /> Photo: Angelika Dummermuth
  • Ice from the brittle zone<br /> <br /> Photo: Tim Burton
  • Close up of brittle ice<br /> <br /> Photo: Tim Burton
  • The core is cut into several sub-samples for multiple different measurements<br /> <br /> Photo: Tim Burton
  • Cutting the ice<br /> <br /> Photo: Kenji Kawamura
  • Close up of the ice<br /> <br /> Photo: Kenji Kawamura
  • Careful inspection of some of the deeper ice. Notice the stone filled dark bands.
  • Close to the bottom bands of small stones and dirt are visible<br /> <br /> Photo: Kenji Kawamura
  • The darker bands are sections with higher impurity (particle) loads<br /> <br /> Photo: Wang Shimeng
  • At some places the impurities are easy to see<br /> <br /> Photo: Sepp Kipfstuhl
  • For visual stratigraphy the ice is cleaned and the light that penetrates is recorded<br /> <br /> Photo: Wang Shimeng
  • Ice ready for visual stratigraphy<br /> <br /> Photo: J.P. Steffensen
  • Bands in the ice can also be seen without the use of instruments<br /> <br /> Photo: J.P. Steffensen
  • Thin cuts of ice<br /> <br /> Photo: Wang Shimeng
  • Polarized light shining through a thin section. Each crystal shines in a different color. The smaller the crystals the more impurities. However crystal size also grows bigger the older the ice<br /> <br /> Photo: Sato Motoyuki
  • Thin section seen through polarized light<br /> <br /> Photo: Sato Motoyuki
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