Articles | Volume 9, issue 2
Atmos. Meas. Tech., 9, 509–524, 2016
https://doi.org/10.5194/amt-9-509-2016
Atmos. Meas. Tech., 9, 509–524, 2016
https://doi.org/10.5194/amt-9-509-2016

Research article 15 Feb 2016

Research article | 15 Feb 2016

A dual-inlet, single detector relaxed eddy accumulation system for long-term measurement of mercury flux

S. Osterwalder et al.

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Short summary
Human activities have increased mercury (Hg) cycling between land and atmosphere. To define landscapes as sinks or sources of Hg we have developed an advanced REA system for long-term measurements of gaseous elemental Hg exchange. It was tested in two contrasting environments: above Basel, Switzerland, and a peatland in Sweden. Both landscapes showed net Hg emission (15 and 3 ng m−2 h−1, respectively). The novel system will help to advance our understanding of Hg exchange on an ecosystem scale.