Mercury isotope evidence for Arctic summertime re-emission of mercury from the cryosphere

Araujo, B.F.; Osterwalder, S.; Szponar, N.; Lee, D.; Petrova, M.V.; Pernov, J.B.; Ahmed, S.; Heimbürger-Boavida, L.; Laffont, L.; Teisserenc, R.; Tananaev, N.; Nordstrom, C.; Magand, O.; Stupple, G.; Skov, H.; Steffen, A.; Bergquist, B.; Pfaffhuber, K.A.; Thomas, J.L.; Scheper, S.; Petäjä, T.; Dommergue, A.; Sonke, J.E.

Авторы: Araujo Beatriz Ferreira, Osterwalder Stefan, Szponar Natalie, Lee Domenica, Petrova Mariia V., Pernov Jakob Boyd, Ahmed Shaddy, Heimbürger-Boavida Lars-Eric, Laffont Laure, Teisserenc Roman, Tananaev Nikita, Nordstrom Claus, Magand Olivier, Stupple Geoff, Skov Henrik, Steffen Alexandra, Bergquist Bridget, Pfaffhuber Katrine Aspmo, Thomas Jennie L., Scheper Simon, Petäjä Tuukka, Dommergue Aurélien, Sonke Jeroen E.
Журнал: Nature communications
Том: 13
Номер: 1
Год издания: 2022
Издательство: Nature Pub. Group
Местоположение издательства: United Kingdom
Номер статьи: 4956
DOI: 10.1038/s41467-022-32440-8
Аннотация: During Arctic springtime, halogen radicals oxidize atmospheric elemental mercury (Hg ⁰ ), which deposits to the cryosphere. This is followed by a summertime atmospheric Hg ⁰ peak that is thought to result mostly from terrestrial Hg inputs to the Arctic Ocean, followed by photoreduction and emission to air. The large terrestrial Hg contribution to the Arctic Ocean and global atmosphere has raised concern over the potential release of permafrost Hg, via rivers and coastal erosion, with Arctic warming. Here we investigate Hg isotope variability of Arctic atmospheric, marine, and terrestrial Hg. We observe highly characteristic Hg isotope signatures during the summertime peak that reflect re-emission of Hg deposited to the cryosphere during spring. Air mass back trajectories support a cryospheric Hg emission source but no major terrestrial source. This implies that terrestrial Hg inputs to the Arctic Ocean remain in the marine ecosystem, without substantial loss to the global atmosphere, but with possible effects on food webs.
Добавил в систему: Тананаев Никита Иванович

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Mercury isotope evidence for Arctic summertime re-emission of mercury from the cryosphereстатья

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