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| Titel |
Atmospheric inorganic nitrogen input via dry, wet, and sea fog deposition to the subarctic western North Pacific Ocean |
| VerfasserIn |
J. Jung, H. Furutani, M. Uematsu, S. Kim, S. Yoon |
| 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 ; 13, no. 1 ; Nr. 13, no. 1 (2013-01-15), S.411-428 |
| Datensatznummer |
250017557
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| Publikation (Nr.) |
 copernicus.org/acp-13-411-2013.pdf |
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| Zusammenfassung |
| Aerosol, rainwater, and sea fog water samples were collected during the
cruise conducted over the subarctic western North Pacific Ocean in the
summer of 2008, in order to estimate dry, wet, and sea fog deposition fluxes
of atmospheric inorganic nitrogen (N). During sea fog events, mean number
densities of particles with diameters larger than 0.5 μm decreased by
12–78%, suggesting that particles with diameters larger than
0.5 μm could act preferentially as condensation nuclei (CN) for sea fog droplets.
Mean concentrations of nitrate (NO3−), methanesulfonic acid (MSA),
and non sea-salt sulfate (nss-SO42−) in sea fog water were higher
than those in rainwater, whereas those of ammonium (NH4+) in both
sea fog water and rainwater were similar. These results reveal that sea fog
scavenged NO3− and biogenic sulfur species more efficiently than
rain. Mean dry, wet, and sea fog deposition fluxes for atmospheric total
inorganic N (TIN; i.e. NH4+ +
NO3−) over the subarctic western North Pacific Ocean were estimated to be
4.9 μmol m−2 d−1, 33 μmol m−2 d−1, and
7.8 μmol m−2 d−1, respectively. While
NO3− was the dominant inorganic N
species in dry and sea fog deposition, inorganic N supplied to surface
waters by wet deposition was predominantly by NH4+. The
contribution of dry, wet, and sea fog deposition to total deposition flux
for TIN (46 μmol m−2 d−1) were 11%, 72%, and 17%,
respectively, suggesting that ignoring sea fog deposition would lead to
underestimate of the total influx of atmospheric inorganic N into the
subarctic western North Pacific Ocean, especially in summer periods. |
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