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| Titel |
A sea spray aerosol flux parameterization encapsulating wave state |
| VerfasserIn |
J. Ovadnevaite, A. Manders, G. de Leeuw, D. Ceburnis, C. Monahan, A.-I. Partanen, H. Korhonen, C. D. O'Dowd |
| 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 ; 14, no. 4 ; Nr. 14, no. 4 (2014-02-17), S.1837-1852 |
| Datensatznummer |
250118408
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| Publikation (Nr.) |
 copernicus.org/acp-14-1837-2014.pdf |
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| Zusammenfassung |
| A new sea spray source function (SSSF), termed Oceanflux Sea Spray Aerosol
or OSSA, was derived based on in-situ sea spray aerosol measurements along
with meteorological/physical parameters. Submicron sea spray aerosol fluxes
derived from particle number concentration measurements at the Mace Head
coastal station, on the west coast of Ireland, were used together with
open-ocean eddy correlation flux measurements from the Eastern Atlantic Sea
Spray, Gas Flux, and Whitecap (SEASAW) project cruise. In the overlapping
size range, the data for Mace Head and SEASAW were found to be in a good
agreement, which allowed deriving the new SSSF from the combined dataset
spanning the dry diameter range from 15 nm to 6 μm. The OSSA source
function has been parameterized in terms of five lognormal modes and the
Reynolds number instead of the more commonly used wind speed, thereby
encapsulating important influences of wave height, wind history, friction
velocity, and viscosity. This formulation accounts for the different flux
relationships associated with rising and waning wind speeds since these are
included in the Reynolds number. Furthermore, the Reynolds number
incorporates the kinematic viscosity of water, thus the SSSF inherently
includes dependences on sea surface temperature and salinity. The
temperature dependence of the resulting SSSF is similar to that of other
in-situ derived source functions and results in lower production fluxes for
cold waters and enhanced fluxes from warm waters as compared with SSSF
formulations that do not include temperature effects. |
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