Air–sea fluxes of oxygenated volatile organic compounds across the Atlantic Ocean

Yang, M; Beale, R; Liss, PS; Johnson, M; Blomquist, BW; Nightingale, PD. 2014 Air–sea fluxes of oxygenated volatile organic compounds across the Atlantic Ocean. Atmospheric Chemistry and Physics, 14 (14). 7499-7517. 10.5194/acp-14-7499-2014

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Official URL: http://dx.doi.org/10.5194/acp-14-7499-2014

Abstract/Summary

We present air-sea fluxes of oxygenated volatile organics compounds (OVOCs) quantified by eddy covariance (EC) during the Atlantic Meridional Transect cruise in 2012. Measurements of acetone, acetaldehyde, and methanol in air as well as in water were made in several different oceanic provinces and over a wide range of wind speeds (1-18 m s(-1)). The ocean appears to be a net sink for acetone in the higher latitudes of the North Atlantic but a source in the subtropics. In the South Atlantic, seawater acetone was near saturation relative to the atmosphere, resulting in essentially zero net flux. For acetaldehyde, the two-layer model predicts a small oceanic emission, which was not well resolved by the EC method. Chemical enhancement of air-sea acetaldehyde exchange due to aqueous hydration appears to be minor. The deposition velocity of methanol correlates linearly with the transfer velocity of sensible heat, confirming predominant airside control. We examine the relationships between the OVOC concentrations in air as well as in water, and quantify the gross emission and deposition fluxes of these gases.

Item Type: Publication - Article
Additional Keywords: REACTION-MASS-SPECTROMETRY; EDDY COVARIANCE; CARBONYL-COMPOUNDS; ATMOSPHERIC METHANOL; TROPICAL ATLANTIC; AQUEOUS SOLUTION; PTR-MS; ACETALDEHYDE; EXCHANGE; ACETONE
Divisions: Plymouth Marine Laboratory > Science Areas > Cycling in the Sunlit Ocean
Depositing User: Mrs Julia Crocker
Date made live: 14 Oct 2014 15:29
Last Modified: 06 Jun 2017 16:12
URI: http://plymsea.ac.uk/id/eprint/6266

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