Physics
Scientific paper
May 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30j..23s&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 10, pp. 23-1, CiteID 1516, DOI 10.1029/2003GL016954
Physics
27
Atmospheric Composition And Structure: Constituent Sources And Sinks, Atmospheric Composition And Structure: Geochemical Cycles, Atmospheric Composition And Structure: Pollution-Urban And Regional (0305), Atmospheric Composition And Structure: Troposphere-Composition And Chemistry, Global Change: Atmosphere (0315, 0325)
Scientific paper
The inventories of global anthropogenic emissions of mercury for years from 1979/1980 to 1995 suggest a substantial reduction in the 1980s and almost constant emissions afterwards. In contrast to emission inventories, measurements of atmospheric mercury suggest a concentration increase in the 1980s and a decrease in the 1990s. Here we present a first attempt to reconstruct the worldwide trend of atmospheric mercury concentrations from direct measurements since the late 1970s. In combination, long term measurements at 6 sites in the northern, 2 sites in the southern hemispheres, during 8 ship cruises over the Atlantic Ocean (1977-2000) provide a consistent picture, suggesting that atmospheric mercury concentrations increased in the late 1970s to a peak in the 1980s, then decreased to a minimum at about 1996, and have been nearly constant since. The observed trend is not consistent with the published inventories of anthropogenic emissions and the assumed ratios of anthropogenic/natural emissions, and suggests the need to improve the mercury emission inventories and to re-evaluate the contribution of natural sources.
Berg Torunn
Brunke Ernst-Günther
Ebinghaus Ralf
Munthe John
Schroeder William
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