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Melting tundra creating vast river of waste into Arctic Ocean

Date:
January 12, 2010
Source:
University of Gothenburg
Summary:
The increase in temperature in the Arctic has already caused the sea-ice there to melt. According to new research from Sweden, if the Arctic tundra also melts, vast amounts of organic material will be carried by the rivers straight into the Arctic Ocean, resulting in additional emissions of carbon dioxide.

Sofia Hjalmarsson, PhD, Department of Chemistry, University of Gothenburg.
Credit: Image courtesy of University of Gothenburg

The increase in temperature in the Arctic has already caused the sea-ice there to melt. According to research conducted by the University of Gothenburg, if the Arctic tundra also melts, vast amounts of organic material will be carried by the rivers straight into the Arctic Ocean, resulting in additional emissions of carbon dioxide.

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Several Russian rivers enter the Arctic Ocean particularly in the Laptev Sea north of Siberia. One of the main rivers flowing into the Laptev Sea is the Lena, which in terms of its drainage basin and length is one of the ten largest rivers in the world. The river water carries organic carbon from the tundra, and research from the University of Gothenburg shows that this adds a considerable amount of carbon dioxide to the atmosphere when it is degraded in the coastal waters.

Increased temperatures

The increase in temperature in the Arctic, which has already made an impact in the form of reduced sea-ice cover during the summer, may also cause the permafrost to melt. "Large amounts of organic carbon are currently stored within the permafrost and if this is released and gets carried by the rivers out into the coastal waters, then it will result in an increased release of carbon dioxide to the atmosphere," says Sofia Hjalmarsson, native of Falkenberg and postgraduate student at the Department of Chemistry.

Study of two areas

In her thesis, Sofia Hjalmarsson has studied the carbon system in two different geographical areas: partly in the Baltic Sea, the Kattegat and the Skagerrak, and partly in the coastal waters north of Siberia (the Laptev Sea, the East Siberian Sea and the Chukchi Sea). The two areas have in common the fact that they receive large volumes of river water containing organic carbon and nutrients, mainly nitrogen.

The thesis Carbon Dynamics in Northern Marginal Seas was publicly defended on 18 December.


Story Source:

The above story is based on materials provided by University of Gothenburg. Note: Materials may be edited for content and length.


Cite This Page:

University of Gothenburg. "Melting tundra creating vast river of waste into Arctic Ocean." ScienceDaily. ScienceDaily, 12 January 2010. <www.sciencedaily.com/releases/2010/01/100111102536.htm>.
University of Gothenburg. (2010, January 12). Melting tundra creating vast river of waste into Arctic Ocean. ScienceDaily. Retrieved October 31, 2014 from www.sciencedaily.com/releases/2010/01/100111102536.htm
University of Gothenburg. "Melting tundra creating vast river of waste into Arctic Ocean." ScienceDaily. www.sciencedaily.com/releases/2010/01/100111102536.htm (accessed October 31, 2014).

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