Atmospheric mercury concentrations observed at ground-based monitoring sites globally distributed in the framework of the GMOS network
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Published:2016-09-23
Issue:18
Volume:16
Page:11915-11935
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ISSN:1680-7324
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Container-title:Atmospheric Chemistry and Physics
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language:en
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Short-container-title:Atmos. Chem. Phys.
Author:
Sprovieri FrancescaORCID, Pirrone Nicola, Bencardino Mariantonia, D'Amore Francesco, Carbone Francesco, Cinnirella Sergio, Mannarino Valentino, Landis MatthewORCID, Ebinghaus Ralf, Weigelt Andreas, Brunke Ernst-Günther, Labuschagne CasperORCID, Martin Lynwill, Munthe John, Wängberg Ingvar, Artaxo PauloORCID, Morais Fernando, Barbosa Henrique de Melo JorgeORCID, Brito JoelORCID, Cairns WarrenORCID, Barbante CarloORCID, Diéguez María del CarmenORCID, Garcia Patricia Elizabeth, Dommergue AurélienORCID, Angot HeleneORCID, Magand Olivier, Skov HenrikORCID, Horvat Milena, Kotnik Jože, Read Katie Alana, Neves Luis Mendes, Gawlik Bernd Manfred, Sena Fabrizio, Mashyanov Nikolay, Obolkin VladimirORCID, Wip Dennis, Feng Xin BinORCID, Zhang Hui, Fu XuewuORCID, Ramachandran Ramesh, Cossa Daniel, Knoery Joël, Marusczak Nicolas, Nerentorp Michelle, Norstrom Claus
Abstract
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.
Funder
Seventh Framework Programme
Publisher
Copernicus GmbH
Subject
Atmospheric Science
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