Annual study of oxygenated volatile organic compounds in UK shelf waters

被引：35

作者：

Beale, Rachael ^{[1
]}

Dixon, Joanna L. ^{[1
]}

Smyth, Timothy J. ^{[1
]}

Nightingale, Philip D. ^{[1
]}

机构：

[1] Plymouth Marine Lab, Plymouth PL1 3DH, Devon, England

来源：

MARINE CHEMISTRY | 2015年 / 171卷

基金：

英国自然环境研究理事会;

关键词：

Oxygenated volatile organic compounds (OVOCs); Methanol; Acetone; Acetaldehyde; Seasonality; Western English Channel; In-situ measurements; Vertical profiles; Air-sea transfer; AIR-SEA FLUXES; CARBONYL-COMPOUNDS; TROPICAL ATLANTIC; MOLECULAR-WEIGHT; PHOTOCHEMICAL PRODUCTION; ATMOSPHERIC BUDGET; METHANOL UPTAKE; ACETONE; ACETALDEHYDE; SEAWATER;

D O I：

10.1016/j.marchem.2015.02.013

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：96 / 106

页数：11

共 57 条

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