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Istituto sull'inquinamento atmosferico

Torna all'elenco Contributi in rivista anno 2016

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Chemical cycling and deposition of atmospheric mercury in polar regions: Review of recent measurements and comparison with models

Anno di pubblicazione: 2016

Formato: Elettronico

Autori: Angot, Hélène; Dastoor, Ashu; De Simone, Francesco; Gärdfeldt, Katarina; Gencarelli, Christian N.; Hedgecock, Ian M.; Langer, Sarka; Magand, Olivier; Magand, Olivier; Mastromonaco, Michelle N.; Nordstrøm, Claus; Pfaffhuber, Katrine A.; Pirrone, Nicola; Ryjkov, Andrei; Selin, Noelle E.; Selin, Noelle E.; Skov, Henrik; Song, Shaojie; Sprovieri, Francesca; Steffen, Alexandra; Toyota, Kenjiro; Travnikov, Oleg; Yang, Xin; Dommergue, Aurélien; Dommergue, Aurélien

Affiliazioni autori: Universite Grenoble Alpes; Air Quality Research Division; CNR-Institute of Atmospheric Pollution Research, Rende; Chalmers University of Technology; IVL Svenska Miljoinstitutet; CNRS Centre National de la Recherche Scientifique; Danmarks Miljoundersogelser; Norsk institutt for luftforskning; CNR-Institute of Atmospheric Pollution Research, Rende; Massachusetts Institute of Technology; Massachusetts Institute of Technology; Meteorological Service of Canada; Meteorological Synthesizing Centre; British Antarctic Survey

Autori CNR:

  • FRANCESCO DE SIMONE
  • CHRISTIAN NATALE GENCARELLI
  • IAN MICHAEL HEDGECOCK
  • NICOLA PIRRONE
  • FRANCESCA SPROVIERI

Lingua: inglese

Abstract: Mercury (Hg) is a worldwide contaminant that can cause adverse health effects to wildlife and humans. While atmospheric modeling traces the link from emissions to deposition of Hg onto environmental surfaces, large uncertainties arise from our incomplete understanding of atmospheric processes (oxidation pathways, deposition, and re-emission). Atmospheric Hg reactivity is exacerbated in high latitudes and there is still much to be learned from polar regions in terms of atmospheric processes. This paper provides a synthesis of the atmospheric Hg monitoring data available in recent years (2011-2015) in the Arctic and in Antarctica along with a comparison of these observations with numerical simulations using four cutting-edge global models. The cycle of atmospheric Hg in the Arctic and in Antarctica presents both similarities and differences. Coastal sites in the two regions are both influenced by springtime atmospheric Hg depletion events and by summertime snowpack re-emission and oceanic evasion of Hg. The cycle of atmospheric Hg differs between the two regions primarily because of their different geography. While Arctic sites are significantly influenced by northern hemispheric Hg emissions especially in winter, coastal Antarctic sites are significantly influenced by the reactivity observed on the East Antarctic ice sheet due to katabatic winds. Based on the comparison of multi-model simulations with observations, this paper discusses whether the processes that affect atmospheric Hg seasonality and interannual variability are appropriately represented in the models and identifies research gaps in our understanding of the atmospheric Hg cycling in high latitudes.

Lingua abstract: inglese

Pagine da: 10735

Pagine a: 10763

Rivista:

Atmospheric chemistry and physics Copernicus Publ.
Paese di pubblicazione: Germania
Lingua: inglese
ISSN: 1680-7316

Numero volume: 16

Numero fascicolo: 16

DOI: 10.5194/acp-16-10735-2016

Stato della pubblicazione: Published version

Indicizzato da: Scopus [2-s2.0-84984871103]

Parole chiave:

  • atmospheric mercury
  • polar regions
  • Chemical cycling
  • Chemical deposition
  • measurements
  • models

URL: http://www.atmos-chem-phys.net/16/10735/2016/acp-16-10735-2016.pdf

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