weight compounds such as ketones, aldehydes, and carboxylic acids
to the ocean surface.
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The identification of the sources for these substances in the marine
atmosphere.
The investigation of mechanisms of exchange of these substances
across the sea/air interface.
We propose a five year program to implement this study, with an initial’
two year funding period requested in this proposal.
SEAREX will be undertaken
as a closely coordinated field and laboratory study with common field and
experimental facilities.
1.
Specifically, we propose:
To estimate from rain and dry deposition measurements the flux
of heavy metals and organic substances during the wet and dry
seasons at Tern Island, French Frigate Shoals in the North Pacific
trades and at Tutuila Island, American Samoa in the South Pacific
trades.
To investigate the importance of the ocean as a source for atmospheric heavy metals and organic substances through enrichment and
fractionation effects occurring during the production of atmospheric
sea salt particles by bursting bubbles.
These studies will be
undertaken using the Bubble Interfacial Microlayer Sampler (BIMS)
developed at the University of Rhode Island (URI) in the earlier
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NSF/IDOE-PTP, together with an assessment of the natural occurrence
of bubbles under varying conditions.
To evaluate the significance of soil and vegetation emissions, forest
fires, and chemical manufacturing sites as sources of the volatile
metals and organic substances found in the marine atmosphere.