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| Titel |
A sea-state based source function for size- and composition-resolved marine aerosol production |
| VerfasserIn |
M. S. Long, W. C. Keene, D. J. Kieber, D. J. Erickson, H. Maring |
| 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 ; 11, no. 3 ; Nr. 11, no. 3 (2011-02-14), S.1203-1216 |
| Datensatznummer |
250009302
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| Publikation (Nr.) |
 copernicus.org/acp-11-1203-2011.pdf |
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| Zusammenfassung |
| A parameterization for the size- and composition-resolved production fluxes
of nascent marine aerosol was developed from prior experimental observations
and extrapolated to ambient conditions based on estimates of air entrainment
by the breaking of wind-driven ocean waves. Production of particulate
organic carbon (OCaer) was parameterized based on Langmuir
equilibrium-type association of organic matter to bubble plumes in seawater
and resulting aerosol as constrained by measurements of aerosol produced
from productive and oligotrophic seawater. This novel approach is the first
to parameterize size- and composition-resolved aerosol production based on
explicit evaluation of wind-driven air entrainment/detrainment fluxes and
chlorophyll-a as a proxy for surfactants in surface seawater. Production
fluxes were simulated globally with an eight aerosol-size-bin version of the
NCAR Community Atmosphere Model (CAM v3.5.07). Simulated production fluxes
fell within the range of published estimates based on observationally
constrained parameterizations. Because the parameterization does not
consider contributions from spume drops, the simulated global mass flux (1.5 × 103 Tg y−1)
is near the lower end of published estimates. The
simulated production of aerosol number (1.4 × 106 m−2 s−1)
and OCaer (29 Tg C y−1) fall near the upper end of published
estimates and suggest that primary marine aerosols may have greater
influences on the physicochemical evolution of the troposphere, radiative
transfer and climate, and associated feedbacks on the surface ocean than
suggested by previous model studies. |
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