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Kalte, kahle Gewässer mit viel Schotter: so ähnlich sieht es in weiten Teilen der Welt während des Quartärs aus: in äquatorfernen Regionen ist das Klima kalt, hier zum Beispiel in Nordamerika, am Fluss Yukon. © Rob Striegl, U.S. Geological Survey. Public domain. => Zurück zum Artikel


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Bildinfo


  • Kalte, kahle Gewässer mit viel Schotter: so ähnlich sieht es in weiten Teilen der Welt während des Quartärs aus: in äquatorfernen Regionen ist das Klima kalt, hier zum Beispiel in Nordamerika, am Fluss Yukon.
  • USGS scientists Doug Halm, Paul Schuster, Peter Murdoch, and Kathy Kelsey collecting melt water samples from Gulkana Glacier.
  • USGS research of the Yukon River has had a long term goal of determining the source and fate of organic carbon transported by the river to the Bering Sea and ultimately the Arctic Ocean.
  • Results of recent analyses identified old carbonin the Yukon River, but also indicated that the chemical source was not derived from ancient plant material stored in the glacier, but from fossil fuel sources derived from atmospheric deposition. This add new complications to the interpretation of carbon sources and sinks in high latitudes and of the apparent sources of old organic carbon exported by arctic rivers.
  • Das Originalbild zeigt mehr Details, zum Beispiel eine Gruppe von Wissenschaftlern.

Source


  • Created: August 14th, 2009
  • Author: Rob Striegl, U.S. Geological Survey. Public domain.
  • Credit: USGS

License


  • On the USGS-website there is the following note concerning copyright:
  • USGS-authored or produced data and information are considered to be in the U.S. Public Domain. While the content of most USGS websites are in the U.S. Public Domain, not all information, illustrations, or photographs on our site are. Some non USGS photographs, images, and/or graphics that appear on USGS websites are used by the USGS with permission from the copyright holder (as required by USGS policy on use of copyrighted material). These materials are generally marked as being copyrighted. To use these copyrighted materials, you must obtain permission from the copyright holder under the copyright law.
  • When using information from USGS information products, publications, or websites, we ask that proper credit be given. Credit can be provided by including a citation such as the following:
  • Credit: U.S. Geological Survey; Department of the Interior/USGS; U.S. Geological Survey/photo by Jane Doe (if the photographer/artist is known)

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Originalseite


  • Das Bild ist Teil eines online-Lexikons.
  • Rhetos Lernlexikon Mathematik, Aachen:


Kalte, kahle Gewässer mit viel Schotter: so ähnlich sieht es in weiten Teilen der Welt während des Quartärs aus: in äquatorfernen Regionen ist das Klima kalt, hier zum Beispiel in Nordamerika, am Fluss Yukon. Rob Striegl, U.S. Geological Survey. Public domain.