Cited by 107Marine and coastal ecosystemsAtmospheric chemistry and aerosolsAtmospheric and Environmental Gas Dynamics

Light nonmethane hydrocarbons in seawater

Plass‐Dülmer, C., Koppmann, R., Ratte, M., Rudolph, J.·1995·Global Biogeochemical Cycles

Abstract

A database of dissolved C 2‐C 4 hydrocarbons in the surface water of the oceans is compiled based on more than 1000 measurements. Hydrocarbon emission rates are calculated using a diffusive microlayer approach and climatologic wind data. This database is used to calculate averages and ranges of variation, and an attempt is made to identify the environmental factors which have an impact on the hydrocarbons dissolved in seawater. The paper focuses on data obtained in situ since other techniques generally contain larger uncertainties. Mean concentrations are 134 pmol/L for ethene, 59 pmol/L for propene, and 37 pmol/L for 1‐butene. Alkane concentrations are lower with an average value of 22 pmol/L for ethane and less than 14 pmol/L for the other alkanes and acetylene. Ninety percent of the concentrations of an individual compound generally ranges within an order of magnitude. Ethene concentrations are significantly anticorrelated with the transfer velocities of the sea‐air exchange (r=−0.49; r 0.01=0.29). Ethene concentrations are not correlated with the solar radiation, chlorophyll a, and the water temperature. Averaged emissions of C 2‐C 4 hydrocarbons extrapolated to the global ocean of 2.1 × 10 12 g/yr are calculated, with ethene alone contributing about 40% to the total. Thus the oceanic source is on the low side of previous estimates and plays a minor role in global budgets compared to continental sources.

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Crossref · 10.1029/94gb02416

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Authors
Plass‐Dülmer, C., Koppmann, R., Ratte, M., & Rudolph, J.
Venue
Global Biogeochemical Cycles
Published
1995-03
Volume
9
Issue
1
Pages
79-100
ISSN
  • 0886-6236 (ISSN-L)
  • 1944-9224
OpenAlex
W1966815211
Cited by
107
References
33
Citations by year
2026: 2 · 2025: 2 · 2024: 3 · 2023: 4 · 2022: 1 · 2021: 2 · 2020: 5 · 2019: 3 · 2018: 2 · 2017: 3 · 2015: 3 · 2014: 1 · 2013: 4 · 2012: 2
FWCI
4.31
Type
journal article
Language
en
Open access
closed
Locations
  • Global Biogeochemical Cycles (publishedVersion)
  • York University Digital Library (York University) (submittedVersion)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric chemistry and aerosols
  • Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric and Environmental Gas Dynamics
Keywords
ethylene, propylene, 1-butene, ethane, acetylene, air-sea exchange

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