Thawing permafrost causes ‘browning’ of lakes, upsetting aquatic ecosystems, study says

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Umiujaq lakes browning

Northern freshwater lakes are turning brown as permafrost thaws and introduces more organic carbon into the water, according to a new study published in the journal Limnology and Oceanography Letters.

http://www.cbc.ca/news/canada/north/thawing-permafrost-lakes-browning-1.4566705?cmp=rss