Concentrations and fluxes of dissolved biogenic gases (DMS, CH{sub 4}, CO, CO{sub 2}) in the equatorial Pacific during the SAGA 3 experiment

Journal Article · Mon Sep 20 04:00:00 EDT 1993 · Journal of Geophysical Research

DOI:https://doi.org/10.1029/93JD00526· OSTI ID:83367

Bates, T S; Johnson, J E ^[1]; Kelly, K C ^[1]

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1. Pacific Marine Environmental Lab., Seattle, WA (United States)

The equatorial Pacific Ocean is a source of both sulfur and carbon to the atmosphere. In February and March 1990, as part of the Soviet-American Gases and Aerosols (SAGA 3) expedition, dimethylsulfide (DMS), methane (CH{sub 4}), carbon monoxide (CO), and carbon dioxide (CO{sub 2}) partial pressures were determined in both surface seawater and the overlying atmosphere of the central equatorial Pacific Ocean (15{degrees}N to 10{degrees}S, 145{degrees}W to 165{degrees}W). The partial pressures were used to calculate the net flux of these gases from the ocean to the atmosphere. The average regional DMS and CO fluxes were similar, 7.1 and 4.2 {mu}mol/m{sup 2}/d, respectively. The mixing ratio of CH{sub 4} in surface seawater was close to equilibrium with the overlying atmosphere and hence the average flux was only 0.39 {mu}mol/m{sup 2}/d. The flux of CO{sub 2} clearly dominated the air-sea carbon exchange with an average regional flux of 5.4 mmol/m{sup 2}/d. 64 refs., 6 figs., 1 tab.

• Sponsoring Organization: USDOE
• OSTI ID: 83367
• Journal Information: Journal of Geophysical Research, Journal Name: Journal of Geophysical Research Journal Issue: D9 Vol. 98; ISSN JGREA2; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CARBON DIOXIDE
CARBON MONOXIDE
DIMETHYL SULFIDE
ECOLOGICAL CONCENTRATION
EQUATOR
METHANE
PACIFIC OCEAN
PARTIAL PRESSURE