 |
| Titel |
Oceanic influence on atmospheric mercury at coastal and inland sites: a springtime noreaster in New England |
| VerfasserIn |
J. M. Sigler, H. Mao, B. C. Sive, R. Talbot |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 9, no. 12 ; Nr. 9, no. 12 (2009-06-18), S.4023-4030 |
| Datensatznummer |
250007433
|
| Publikation (Nr.) |
 copernicus.org/acp-9-4023-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| Continuous measurements of elemental (Hg0) 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 Hg0 were observed at a coastal and a high
elevation inland site. This enhancement occurred simultaneously with
elevated mixing ratios of three marine tracers, CH3I, CH2Br2
and CHBr3. These observations suggest a marine source of Hg0,
possibly outgassing from the ocean surface during strong turbulence. The
Hg0 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 Hg0 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 Hg0
during the storm (~7 ppqv h−1) which can account for the
observed enhancement at the field sites. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|