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Atmospheric mercury concentrations observed at ground-based monitoring sites globally distributed in the framework of the GMOS network

2016; Copernicus Publications; Volume: 16; Issue: 18 Linguagem: Inglês

10.5194/acp-16-11915-2016

ISSN

1680-7324

Autores

Francesca Sprovieri, Nicola Pirrone, Mariantonia Bencardino, Francesco D’Amore, Francesco Carbone, Sergio Cinnirella, Valentino Mannarino, Matthew S. Landis, Ralf Ebinghaus, Andreas Weigelt, Ernst-Günther Brunke, Casper Labuschagne, Lynwill Martin, John Munthe, Ingvar Wängberg, Paulo Artaxo, Fernando G. Morais, Henrique M. J. Barbosa, Joël Brito, Warren R. L. Cairns, Carlo Barbante, María C. Diéguez, Patricia E. Garcı́a, Aurélien Dommergue, Hélène Angot, Olivier Magand, Henrik Skov, Milena Horvat, Jože Kotnik, Katie Read, Luis Neves, Bernd Manfred Gawlik, Fabrizio Sena, Nikolay Mashyanov, В. А. Оболкин, Dennis Wip, Xin Feng, Hui Zhang, Xuewu Fu, R. Ramesh, Daniel Cossa, Joël Knœry, Nicolas Marusczak, Michelle Nerentorp, Claus Norstrom,

Tópico(s)

Mercury impact and mitigation studies

Resumo

Abstract. Long-term monitoring of data of ambient mercury (Hg) on a global scale to assess its emission, transport, atmospheric chemistry, and deposition processes is vital to understanding the impact of Hg pollution on the environment. The Global Mercury Observation System (GMOS) project was funded by the European Commission (http://www.gmos.eu) and started in November 2010 with the overall goal to develop a coordinated global observing system to monitor Hg on a global scale, including a large network of ground-based monitoring stations, ad hoc periodic oceanographic cruises and measurement flights in the lower and upper troposphere as well as in the lower stratosphere. To date, more than 40 ground-based monitoring sites constitute the global network covering many regions where little to no observational data were available before GMOS. This work presents atmospheric Hg concentrations recorded worldwide in the framework of the GMOS project (2010–2015), analyzing Hg measurement results in terms of temporal trends, seasonality and comparability within the network. Major findings highlighted in this paper include a clear gradient of Hg concentrations between the Northern and Southern hemispheres, confirming that the gradient observed is mostly driven by local and regional sources, which can be anthropogenic, natural or a combination of both.

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