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

Autor: Beatriz Ferreira Araujo, Stefan Osterwalder, Natalie Szponar, Domenica Lee, Mariia V. Petrova, Jakob Boyd Pernov, Shaddy Ahmed, Lars-Eric Heimbürger-Boavida, Laure Laffont, Roman Teisserenc, Nikita Tananaev, Claus Nordstrom, Olivier Magand, Geoff Stupple, Henrik Skov, Alexandra Steffen, Bridget Bergquist, Katrine Aspmo Pfaffhuber, Jennie L. Thomas, Simon Scheper, Tuukka Petäjä, Aurélien Dommergue, Jeroen E. Sonke

Publikováno v: Nature Communications, Vol 13, Iss 1, Pp 1-12 (2022)

Arctic warming thaws permafrost, leading to enhanced soil mercury transport to the Arctic Ocean. Mercury isotope signatures in arctic rivers, ocean and atmosphere suggest that permafrost mercury is buried in marine sediment and not emitted to the glo

Externí odkaz: https://doaj.org/article/a469e45f2068459bb6ca075362dd25d1

Modelling the coupled mercury-halogen-ozone cycle in the central Arctic during spring

Autor: Shaddy Ahmed, Jennie L. Thomas, Hélène Angot, Aurélien Dommergue, Stephen D. Archer, Ludovic Bariteau, Ivo Beck, Nuria Benavent, Anne-Marlene Blechschmidt, Byron Blomquist, Matthew Boyer, Jesper H. Christensen, Sandro Dahlke, Ashu Dastoor, Detlev Helmig, Dean Howard, Hans-Werner Jacobi, Tuija Jokinen, Rémy Lapere, Tiia Laurila, Lauriane L. J. Quéléver, Andreas Richter, Andrei Ryjkov, Anoop S. Mahajan, Louis Marelle, Katrine Aspmo Pfaffhuber, Kevin Posman, Annette Rinke, Alfonso Saiz-Lopez, Julia Schmale, Henrik Skov, Alexandra Steffen, Geoff Stupple, Jochen Stutz, Oleg Travnikov, Bianca Zilker

Publikováno v: Elementa: Science of the Anthropocene

Near-surface mercury and ozone depletion events occur in the lowest part of the atmosphere during Arctic spring. Mercury depletion is the first step in a process that transforms long-lived elemental mercury to more reactive forms within the Arctic th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::058da365691a0b9a894c9b23261ec64a
https://hdl.handle.net/11250/3077473

Implementation and Impacts of Surface and Blowing Snow Sources of Arctic Bromine Activation Within WRF‐Chem 4.1.1

Autor: Jennie L. Thomas, Louis Marelle, Foteini Baladima, Katie Tuite, Markus M. Frey, Aurélien Dommergue, Shaddy Ahmed, William R. Simpson, Jochen Stutz

Publikováno v: Journal of Advances in Modeling Earth Systems
Journal of Advances in Modeling Earth Systems, American Geophysical Union, 2021, e2020MS002391 (in press). ⟨10.1029/2020ms002391⟩
Journal of Advances in Modeling Earth Systems, American Geophysical Union, 2021, 13 (8), pp.e2020MS002391. ⟨10.1029/2020ms002391⟩
Journal of Advances in Modeling Earth Systems, Vol 13, Iss 8, Pp n/a-n/a (2021)
Journal of Advances in Modeling Earth Systems, 2021, 13 (8), pp.e2020MS002391. ⟨10.1029/2020ms002391⟩

Elevated concentrations of atmospheric bromine are known to cause ozone depletion in the Arctic, which is most frequently observed during springtime. We implement a detailed description of bromine and chlorine chemistry within the WRF‐Chem 4.1.1 mo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59503bd29777903d62c23f9f49018da7
https://doi.org/10.1029/2020ms002391

Quantifying Nitrous Acid Formation Mechanisms Using Measured Vertical Profiles During the CalNex 2010 Campaign and 1D Column Modeling

Autor: James Flynn, Jochen Stutz, Shaddy Ahmed, Rebecca A. Washenfelder, Katie Tuite, Sébastien Dusanter, O. Pikelnaya, Louisa K. Emmons, Stephen M. Griffith, Si-Wan Kim, Cora J. Young, Philip S. Stevens, Catalina Tsai, Patrick R. Veres, Jennie L. Thomas, James M. Roberts

Publikováno v: Journal of Geophysical Research: Atmospheres
Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2021, 126 (13), pp.e2021JD034689. ⟨10.1029/2021JD034689⟩
Journal of Geophysical Research: Atmospheres, 2021, 126 (13), pp.e2021JD034689. ⟨10.1029/2021JD034689⟩

International audience; Nitrous acid (HONO) is an important radical precursor that can impact secondary pollutant levels, especially in urban environments. Due to uncertainties in its heterogeneous formation mechanisms, models often under predict HON

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::129b570a0953828af1d8c5624fa785f1
https://hal.archives-ouvertes.fr/hal-03357646/document