期刊
MARINE CHEMISTRY
卷 171, 期 -, 页码 96-106出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.marchem.2015.02.013
关键词
Oxygenated volatile organic compounds (OVOCs); Methanol; Acetone; Acetaldehyde; Seasonality; Western English Channel; In-situ measurements; Vertical profiles; Air-sea transfer
资金
- PML's Research Program funding scheme
- UK Natural Environment Research Council National Capability
- NERC [pml010007, pml010002, pml010009] Funding Source: UKRI
- Natural Environment Research Council [pml010009, pml010002, NE/C517192/1, pml010007] Funding Source: researchfish
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 2-10 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 4-37 nM in surface waters with higher values observed in autumn and winter. Surface concentrations of methanol ranged from 16-78 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. (C) 2015 The Authors. Published by Elsevier B.V.
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