Articles | Volume 13, issue 7
https://doi.org/10.5194/bg-13-2029-2016
https://doi.org/10.5194/bg-13-2029-2016
Research article
 | 
07 Apr 2016
Research article |  | 07 Apr 2016

Seasonal variations in metallic mercury (Hg0) vapor exchange over biannual wheat–corn rotation cropland in the North China Plain

Jonas Sommar, Wei Zhu, Lihai Shang, Che-Jen Lin, and Xinbin Feng

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Short summary
A micrometeorological method (REA) has been implemented to assess the role of cereal crop fields in the North China Plain as a source or sink of elemental mercury vapor (Hg0) during the course of a full year. In combination with chamber measurements under the canopy, the above-canopy REA measurements provided evidence for a balance between Hg0 ground emissions and uptake of Hg0 by the crop foliage, with net emissions prevailing from the ecosystem during the majority of a year.
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