Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7699431 | Marine Chemistry | 2015 | 11 Pages |
Abstract
We performed an annual study of oxygenated volatile organic compound (OVOC) seawater concentrations at a site off Plymouth, UK in the Western English Channel over the period of February 2011-March 2012. Acetone concentrations ranged from 2-10Â nM (nanomole/L) in surface waters with a maximum observed in summer. Concentrations correlated positively with net shortwave radiation and UV light, suggestive of photochemically linked acetone production. We observed a clear decline in acetone concentrations below the mixed layer. Acetaldehyde varied between 4-37Â nM in surface waters with higher values observed in autumn and winter. Surface concentrations of methanol ranged from 16-78Â nM, but no clear annual cycle was observed. Methanol concentrations exhibited considerable inter-annual variability. We estimate consistent deposition to the sea surface for acetone and methanol but that the direction of the acetaldehyde flux varies during the year.
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Physical Sciences and Engineering
Chemistry
Chemistry (General)
Authors
Rachael Beale, Joanna L. Dixon, Timothy J. Smyth, Philip D. Nightingale,