Showing papers by "John Munthe published in 2001"
TL;DR: An intercomparison for sampling and analysis of atmospheric mercury species was held in Tuscany, June 1998 as mentioned in this paper, where the results showed that the different methods employed for TGM compared well whereas RGM and TPM showed a somewhat higher variability.
157 citations
TL;DR: In this article, the authors measured at five sites in Northwest Europe and at five coastal sites in the Mediterranean region during measurements at four seasons, and observed concentrations of total gaseous mercury, total particulate mercury (TPM), and reactive gasaseous Mercury (RGM).
120 citations
TL;DR: In this article, the concentrations of total gaseous mercury (TGM) in air over the southern Baltic Sea were measured during summer and winter, and surface water saturation and air-water fluxes were calculated.
91 citations
TL;DR: In this paper, the Eulerian transport model HMET has been modified and extended to also include mercury species, and a scheme for chemical conversion of elemental mercury to other species of mercury and deposition characteristics of different mercury species have been included in the model.
76 citations
TL;DR: In Sweden, the atmosphere remains the major source of mercury in Swedish ecosystems as mentioned in this paper, and the decreases in emissions can be attributed to both direct measures to close known point sources and a declining economy and energy consumption in many East European countries.
Abstract: The atmosphere remains the major source of mercuryin Swedish ecosystems. Since the late eighties,atmospheric emissions of mercury have drasticallydecreased in Europe. Wet deposition of mercury hasdecreased over the last decade but still exhibitsa clear south-to-north gradient, greatlyinfluenced by source areas in northern and centralEurope. The decreases in emissions can beattributed to both direct measures to close knownpoint sources and a declining economy and energyconsumption in many East European countries.Further reductions of mercury emissions willrequire that other source categories such asindirect emissions from mercury-containingproducts and crematories are be considered.
55 citations
TL;DR: In this paper, a comprehensive mercury model system using the Eulerian reference frame of the acid deposition and Oxidant Model (ADOM) has been developed under the Canada-Germany Science & Technology Co-operation Agreement and applied within the European Union MArine Science and Technology-BAltic Sea SYstem Study (MAST-III-BASYS) and the Environment & Climate project Mercury Species over Europe (MOE), to study the regional transport and deposition fluxes of atmospheric mercury species.
55 citations
TL;DR: In this paper, a method for investigating in-situm methylation and mobility of mercury has been developed and applied to forest soil, based on additions of stable 199Hgisotopes to the forest soil plots followed by sampling and analysis of isotope ratios of totalmercury and MeHg using ICP-MS.
Abstract: A method for investigating in-situmethylation and mobility of mercury has beendeveloped and applied to forest soil. The methodis based on additions of stable 199Hgisotopes to forest soil plots followed bysampling and analysis of isotope ratios of totalmercury and MeHg using ICP-MS. Initial resultsindicate that a fraction (30%) of the mercuryadded to the forest soils is immobilised over atime scale of 16 months. A small but significantfraction of the mercury is methylated during thesame time scale. Higher methylation rates werefound in wetland soil than in dry forest podzolsoil.
23 citations
01 Jan 2001
TL;DR: In this paper, the authors compare modelling results with long-term observations and comparison of calculated items of regional balances in order to compare the results of their model with longterm observations.
Abstract: Stage III. Comparison of modelling results with long-term observations and comparison of calculated items of regional balances
7 citations
3 citations
TL;DR: In this paper, the mechanism and kinetics of the formation of methylmercury from an experimental solution containing divalent mercury and acetic acid has been investigated in a 2-dm3 Teflon reactor.