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| Titel |
A sea spray generation function for fetch-limited conditions |
| VerfasserIn |
J. Piazzola, P. Forget, S. Despiau |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 20, no. 1 ; Nr. 20, no. 1, S.121-131 |
| Datensatznummer |
250014348
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| Publikation (Nr.) |
 copernicus.org/angeo-20-121-2002.pdf |
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| Zusammenfassung |
This paper presents a sea
spray generation function for aerosols produced by bubbles bursting that
accounts for the effects of fetch. This is achieved by introducing a
fetch-dependent model for the whitecap fraction, which is valid for
fetch-limited conditions, i.e. steady-state conditions of the wave field in the
whitecap droplet flux derived by Monahan et al. (1986). The aerosol generation
fluxes calculated by this method show an enhancement of the aerosol production
with increasing fetch. However, the predicted generation fluxes are lower than
those calculated by using the classical model for the whitecap fraction
proposed by Monahan and O’Muircheartaigh (1980). The results are then
compared to aerosol size distributions measured in a Mediterranean coastal site
at various fetch lengths. The data confirm the role of fetch, through its
influence on marine aerosol generation and subsequent particle dispersion. The
aerosol size distributions are divided into "fine" and
"coarse" fractions. Submicrometer particles decrease in concentration
at larger fetch, while the concentrations of super micron aerosols increase
with increasing fetch.
Key words. Atmospheric composition
and structure (aerosols and particles) Meteorology and atmospheric dynamics
(waves and ties) Oceanography: physical (air-sea interactions) |
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