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Arctic mercury levels drop during the winter

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DIG DEEPER at Norwegian SciTech News:
https://norwegianscitechnews.com/2022/08/arctic-mercury-levels-drop-during-the-depths-of-the-winter/

The interplay between mercury and manganese in Arctic seawater may explain a surprising drop researchers found in mercury levels in the Barents Sea during the winter.

Over the last decade, researchers have learned a lot about the polar night — discovering everything from how tiny marine critters migrate up and down in the sea in response to the weak light of the moon, to seabirds that dive into the pitch-black ocean to feast on bioluminescent plankton and krill.

But what is less well known is how the chemistry of Arctic Ocean water changes during this period, when the sun remains completely below the horizon for a full 24-hour day.

Now, in an article published in Nature Geoscience, Norwegian University of Science and Technology (NTNU) researchers report on a surprising trend they discovered in mercury levels in the ocean during the polar night.

“We found that total mercury concentrations in the Barents Sea decreased by about 33 percent from summer to winter,” said Stephen G. Kohler, a PhD candidate at NTNU’s Marine Chemistry and Biogeochemistry group in the Department of Chemistry and first author of the article.

DIG DEEPER at Norwegian SciTech News:
https://norwegianscitechnews.com/2022/08/arctic-mercury-levels-drop-during-the-depths-of-the-winter/
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