Atmospheric mercury measurements at Cape Point,South Africa |
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| Institution: | 1. Department of Chemistry, University of Stellenbosch, Private Bag X1, Matieland, Stellenbosch, South Africa;2. Department of Environmental Affairs and Tourism, P.O. Box 320, Stellenbosch 7600, South Africa;3. Max-Planck-Institut für Chemie, Airchemistry Department, P.O. Box 3060, D-55020 Mainz, Germany;1. Institute of Geological Sciences, University of Wroc?aw, Cybulskiego 30, 50-205 Wroc?aw, Poland;2. West Australian Biogeochemistry Centre, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia;3. Institute of Physics, Marie Curie-Sk?odowska University, Maria Curie Sk?odowska square 1, 20-031 Lublin, Poland;4. Schlumberger, 127 avenue du Bois de la Pie, 95971 Roissy, France;1. Department of Emergency Medicine, University of Alberta, 790 University Terrace Building, 8303 - 112 Street, Edmonton, Alberta T6G 2T4, Canada;2. Institute of Health Economics, 1200, 10405 Jasper Avenue NW, Edmonton, Alberta T5J 3N4, Canada;3. Emergency Strategic Clinical Network, Alberta Health Services, Alberta Health Services Corporate Office, Seventh Street Plaza, 14th Floor, North Tower, 10030 – 107 Street NW, Edmonton, Alberta T5J 3E4, Canada;4. School of Public Health, University of Alberta, 3-300 Edmonton Clinic Health Academy, 11405 - 87 Ave, Edmonton, Alberta T6G 1C9, Canada;1. Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;1. Unit of Sustainable Forest Management, Department of Vegetal Production, University of Santiago de Compostela, E-27002 Lugo, Spain;2. Subdirección General de Recursos Forestales, Xunta de Galicia, E-15704 Santiago de Compostela, Spain;3. Department of Soil Science and Agricultural Chemistry, University of Santiago de Compostela, E-27002 Lugo, Spain;1. Department of Ecology, Biogeochemistry and Environmental Protection, Wroc?aw University, ul. Kanonia 6/8, 50-328 Wroclaw, Poland;2. Department of Applied Geology, Geochemistry and Environmental Management Institute of Geological Sciences, University of Wroc?aw, Cybulskiego 32, 50-205 Wroc?aw, Poland;3. Radboud University Nijmegen, Institute for Water and Wetland Research, Department of Environmental Science, Huygens building, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands |
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| Abstract: | The monitoring of total gaseous Hg (TGM) was established at the Cape Point Global Atmospheric Watch (GAW) station in September 1995. This paper presents the first data obtained until June 1999. Atmospheric Hg concentrations were found to be fairly homogeneous fluctuating between 1.2–1.4 ng m?3. Whilst no significant diurnal variation is detectable, a slight seasonal variation with a TGM minimum in March–May and maximum in June–August was observed. A minimum annual TGM concentration was detected in 1997, 1 year later than observed at the Wank summit in the Northern Hemisphere (NH). The Cape Point GAW station was found to constitute a suitable site for monitoring TGM concentrations in the Southern Hemisphere (SH). |
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