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Disappearing arctic lakes linked to climate change

ies in the colder permafrost regions.

Many lakes decreased in size or dried up completely, while other lakes actually increased in size. Researchers say as the climate warms, additional meltwater accumulated in the lakes located in the colder regions of thicker permafrost increase their size; however, if climate warming continues, even those lakes would eventually be susceptible to loss.

"We expect areas of continuous permafrost to continue to thin and move steadily northward, resulting in the disappearance of more lakes," said Smith.

In regions with thin or discontinuous permafrost, surface soils also become drier as the permafrost degrades.

"The changing lakes are a consistent, measurable indication of the overall changes to hydrology in the Arctic," said Hinzman. "The loss of surface water will inevitably impact local ecosystems, which will have a cascading effect. Changes could include loss of migratory bird habitat resulting in an effect on subsistence activities as well as changes to local and regional atmospheric conditions, including more localized wind and more frequent and more severe wildland fires."


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Source:University of Alaska - Fairbanks


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