Articles | Volume 13, issue 4
Atmos. Meas. Tech., 13, 2057–2074, 2020
https://doi.org/10.5194/amt-13-2057-2020
Atmos. Meas. Tech., 13, 2057–2074, 2020
https://doi.org/10.5194/amt-13-2057-2020

Research article 22 Apr 2020

Research article | 22 Apr 2020

Eddy covariance flux measurements of gaseous elemental mercury over a grassland

Stefan Osterwalder et al.

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Short summary
Direct mercury (Hg) flux studies are crucial to improve our understanding of terrestrial Hg cycling and human Hg exposure. We tested a new system to measure Hg fluxes using the eddy covariance technique. Our Eddy Mercury system revealed a net Hg re-emission flux from a grassland. We concluded that the prevailing dry conditions resulted in low uptake of CO2 and Hg. Eddy Mercury has the potential to address some of the largest uncertainties in global Hg cycling through long-term flux measurements.