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| Titel |
Gaseous elemental and reactive mercury in Southern New Hampshire |
| VerfasserIn |
J. M. Sigler, H. Mao, R. Talbot |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 9, no. 6 ; Nr. 9, no. 6 (2009-03-19), S.1929-1942 |
| Datensatznummer |
250007085
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| Publikation (Nr.) |
 copernicus.org/acp-9-1929-2009.pdf |
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| Zusammenfassung |
| We conducted measurements of Hg0 and RGM at two inland sites, Thompson
Farm (TF) and Pac Monadnock (PM), and a marine site (Appledore Island (AI))
from the UNH AIRMAP observing network in New Hampshire in 2007. Measurements
of other important trace gases and meteorological variables were used to
help understand influences on the atmospheric Hg budget in New England.
Seasonal variation in both species observed at TF and PM is attributable to
such factors as seasonal variation in deposition strength, meteorological
conditions and biogenic emissions. Hg0 and RGM varied diurnally at TF,
particularly in spring, following the trend in air temperature and jNO2
and suggesting photochemical production of RGM. The diurnal patterns of
Hg0 and RGM at AI during summer were nearly opposite in phase, with
Hg0 decreasing through late afternoon, suggesting more significant
photochemical oxidation of Hg0 to RGM in the marine environment, likely
due to the presence of marine halogen compounds. A significant relationship
of RGM with SO2 at TF suggests a strong contribution of RGM from
anthropogenic sources. Significant levels of halogen compounds measured at
TF in previous studies, as well as similar Hg0 levels and Hg0-CO
ratios at TF and AI may suggest that similar air masses are prevalent at
these sites. |
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