Oceanic influence on atmospheric mercury at coastal and inland sites: a springtime noreaster in New England
Item
Title (Dublin Core)
Oceanic influence on atmospheric mercury at coastal and inland sites: a springtime noreaster in New England
Description (Dublin Core)
Continuous measurements of elemental (Hg<sup>0</sup>) and reactive mercury were conducted at two sites in New Hampshire during a powerful April 2007 noreaster. During the most intense period of the storm, enhancements of ~30–50 ppqv in Hg<sup>0</sup> were observed at a coastal and a high elevation inland site. This enhancement occurred simultaneously with elevated mixing ratios of three marine tracers, CH<sub>3</sub>I, CH<sub>2</sub>Br<sub>2</sub> and CHBr<sub>3</sub>. These observations suggest a marine source of Hg<sup>0</sup>, possibly outgassing from the ocean surface during strong turbulence. The Hg<sup>0</sup> enhancement observed 100 km inland suggests that the impact of coastal storms on terrestrial Hg cycling may not be limited to near-shore environments. Combining Hg<sup>0</sup> and marine tracer measurements during the storm with estimates of oceanic tracer fluxes during previous strong storms yields an order-of-magnitude estimate of the oceanic source of Hg<sup>0</sup> during the storm (~7 ppqv h<sup>−1</sup>) which can account for the observed enhancement at the field sites.
Creator (Dublin Core)
Sigler, J. M.
Mao, H.
Sive, B. C.
Talbot, R.
Date (Dublin Core)
2018-01-15
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-9-4023-2009
https://acp.copernicus.org/articles/9/4023/2009/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
