Measurements of organic species in air and seawater from the tropical Atlantic.

Williams, Jonathan, Holzinger, Rupert, Gros, V., Xu, X., Atlas, E. and Wallace, Douglas W.R. (2004) Measurements of organic species in air and seawater from the tropical Atlantic. Open Access Geophysical Research Letters, 31 (23). L23S06. DOI 10.1029/2004GL020012.

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Abstract

A West ‐East crossing of the Tropical Atlantic during Meteor cruise 55 included measurements of organic species within the atmospheric marine boundary layer and the upper ocean. Acetone, methanol, acetonitrile and DMS were measured between 10–0°N and 35°W–5°E, on either side of the ITCZ. Methanol and acetone concentrations were higher in the northern hemisphere, both in surface seawater and the atmosphere whereas acetonitrile and DMS showed no significant interhemispheric gradient. Three depth profiles from 0–200 m for these species were measured. Acetone, methanol, DMS and acetonitrile generally decreased with depth with the sharpest decrease in concentration in all profiles being found at the bottom of the mixed layer. The average air mixing ratios and surface seawater concentrations for the whole dataset are respectively: acetone 0.53 nmol/mol and 17.6 nmol/L; acetonitrile 0.11 nmol/mol and 6.19 nmol/L; methanol 0.89 nmol/mol and 118.4 nmol/L; and DMS 0.05 nmol/mol and 1.66 nmol/L.

Document Type: Article
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
Refereed: Yes
Open Access Journal?: No
Publisher: AGU (American Geophysical Union)
Date Deposited: 11 Feb 2010 10:06
Last Modified: 21 Mar 2018 13:28
URI: https://oceanrep.geomar.de/id/eprint/4027

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