Decreasing trends in total gaseous mercury observations in baseline air at Mace Head, Ireland from 1996 to 2011R. Ebinghaus, S. G. Jennings, H. H. Kock, R. G. Derwent, A. J. Manning, T. G. Spain and A. WeigeltE3S Web of Conferences, 1 (2013) 07009DOI: https://doi.org/10.1051/e3sconf/20130107009