Long-term atmospheric emissions for the Coal Oil Point natural marine hydrocarbon seep field, offshore California
Abstract θ θ ′ (θ) -derived atmospheric emissions is given. The model inversion is for the far field, which was satisfied by gridding the sonar seepage and treating each grid cell as a separate Gaussian plume. This assumption was validated by offshore in situ data that showed major seep area plumes were Gaussian. Plume total carbon, TC (TC = + 2, + 2 and 82 % was THC; 85 % of THC was CH4. These compositions were similar to the seabed composition, demonstrating efficient vertical plume transport of dissolved seep gases. Air samples also measured atmospheric alkane plume composition. The inversion model used observed winds and derived the 3-decade-average (1990–2021) field-wide atmospheric emissions of 83 400 ± 3 THC d- 1 - 1 - 1 3 THC d- 1 1 –C6 alkane emissions were 19, 1.3, 2.5, 2.2, 1.1, and 0.15 Gg yr- 1 4 emissions over the ∼ 2 of 25 × 2 bins with sonar values above noise were 5.7 µ M m- 2 - 1. The approach can be extended to derive emissions from other dispersed sources such as landfills, industrial sites, or terrestrial seepage if source locations are constrained spatially.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Long-term atmospheric emissions for the Coal Oil Point natural marine hydrocarbon seep field, offshore California ; volume:21 ; number:23 ; year:2021 ; pages:17607-17629 ; extent:23
Atmospheric chemistry and physics ; 21, Heft 23 (2021), 17607-17629 (gesamt 23)
- Creator
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Leifer, Ira
Melton, Christopher
Blake, Donald R.
- DOI
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10.5194/acp-21-17607-2021
- URN
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urn:nbn:de:101:1-2021120904263226601546
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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15.08.2025, 7:30 AM CEST
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Associated
- Leifer, Ira
- Melton, Christopher
- Blake, Donald R.
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