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

Araujo, Beatriz Ferreira and Osterwalder, Stefan and Szponar, Natalie and Lee, Domenica and Petrova, Mariia V. and Pernov, Jakob Boyd and Ahmed, Shaddy and Heimbürger-Boavida, Lars-Eric and Laffont, Laure and Teisserenc, Roman and Tananaev, Nikita and Nordstrom, Claus and Magand, Olivier and Stupple, Geoff and Skov, Henrik and Steffen, Alexandra and Bergquist, Bridget and Pfaffhuber, Katrine Aspmo and Thomas, Jennie L. and Scheper, Simon and Petäjä, Tuukka and Dommergue, Aurélien and Sonke, Jeroen E.. (2022) Mercury isotope evidence for Arctic summertime re-emission of mercury from the cryosphere. Nature Communications, 13. p. 4956.

Full text not available from this repository.

Official URL: https://edoc.unibas.ch/89817/

Downloads: Statistics Overview


During Arctic springtime, halogen radicals oxidize atmospheric elemental mercury (Hg0), which deposits to the cryosphere. This is followed by a summertime atmospheric Hg0 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.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Geowissenschaften > Umweltgeowissenschaften (Alewell)
UniBasel Contributors:Alewell, Christine and Scheper, Simon
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Nature Publishing Group
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:07 Jun 2023 07:44
Deposited On:20 Dec 2022 13:35

Repository Staff Only: item control page