Nonequilibrium of carbon monoxide and methane at the air-sea interface

Lamontagne, R. A.; Swinnerton, J. W.; Linnenbom, V. J.

doi:10.1029/jc076i021p05117

Cited by 72 publications

(26 citation statements)

References 13 publications

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“…Results Table 2 indicate regions without data. Early measurements (late 1960s and early 1970s) in the Pacific by Lamontagne et al [1971Lamontagne et al [ , 1973Lamontagne et al [ , 1974 suggested that the ocean was much more supersaturated at that time with average SR of approximately 1.3. [1995] for the world's oceans.…”

Section: Apch4 = (Pa -Pw) [(X)w-(x)a]mentioning

confidence: 99%

A reevaluation of the open ocean source of methane to the atmosphere

Bates¹,

Kelly²,

Johnson³

et al. 1996

J. Geophys. Res.

139

114

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Seawater and atmospheric methane (CH4) mixing ratios were measured on five cruises throughout the Pacific Ocean from 1987 to 1994 to assess the magnitude of the ocean‐atmosphere flux. The results showed consistent regional and seasonal variations with surface seawater concentrations ranging from 1.6 to 3.6 nM and saturation ratios ranging from 0.95 to 1.17. The equatorial Pacific Ocean was supersaturated with respect to atmospheric CH4 partial pressures, while areas outside the tropics often were undersaturated during fall and winter. Although atmospheric CH4 mixing ratios over the North Pacific during April increased 3.4% from 1988 to 1993, the saturation ratios remained constant. Based on the concentration fields, the data were divided into two seasons and 10 latitude zones from 75°S to 75°N. Using monthly Comprehensive Ocean‐Atmosphere Data Set (COADS) wind and surface seawater temperature data and the Wanninkhof [1992] wind speed/transfer velocity relationship, the calculated zonal average fluxes ranged from −0.1 to 0.4 μmol m−2 d−1. The combined seasonal and zonal fluxes result in a total global ocean‐to‐atmosphere flux of 25 Gmol yr−1 (0.4 Tg CH4 yr−1), which is an order of magnitude less than previous estimates [Intergovernmental Panel on Climate Change (IPCC), 1994]. The estimated uncertainty in this number is approximately a factor of 2.

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Section: Apch4 = (Pa -Pw) [(X)w-(x)a]mentioning

confidence: 99%

A reevaluation of the open ocean source of methane to the atmosphere

Bates¹,

Kelly²,

Johnson³

et al. 1996

J. Geophys. Res.

139

114

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show abstract

“…CH 4 is often 10 to 75% supersaturated within the oxygenated surface mixed layer in most areas of the global ocean (Lamontagne et al 1971(Lamontagne et al , 1973, making the oceans a net source of this gas to the atmosphere (Owens et al 1991, Bange et al 1994, Bates et al 1996, Rhee et al 2009. In the open ocean, these supersaturated concentrations are thought to be the product of in situ production in this oxygenated layer (Scranton & Brewer 1977, Tilbrook & Karl 1995.…”

Section: Introductionmentioning

confidence: 99%

Aerobic production of methane from dissolved water-column methylphosphonate and sinking particles in the North Pacific Subtropical Gyre

Valle¹,

Karl²

2014

Aquat. Microb. Ecol.

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“…Carbon monoxide (CO) is the major substrate of the reactions of hydroxyl radical in the troposphere and hence strongly affects the oxidizing capacity of the atmosphere and the concentrations of other trace gases. Concentrations of CO dissolved in surface seawater are much higher than expected by equilibration with atmospheric CO 1–6. The supersaturation results in a flux of CO from the ocean into the atmosphere that has been estimated by several investigators to be in the order of 10–245 Tg/yr,5–7 suggesting its significant role in marine boundary chemistry.…”

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confidence: 95%