On the methane paradox : transport from shallow water zones rather than in situ methanogenesis is the major source of CH4 in the open surface water of lakes

Fernández, Jorge Encinas; Peeters, Frank; Hofmann, Hilmar

On the methane paradox : transport from shallow water zones rather than in situ methanogenesis is the major source of CH4 in the open surface water of lakes

Files

Fernandez_0-387705.pdf(543.71 KB)

Date

2016

Authors

Fernández, Jorge Encinas

Peeters, Frank

Hofmann, Hilmar

Publication type

Journal article

Publication status

Published

Published in

Journal of Geophysical Research: Biogeosciences ; 121 (2016), 10. - pp. 2717-2726. - ISSN 2169-8953. - eISSN 2169-8961

Abstract

Estimates of global methane (CH4) emissions from lakes and the contributions of different pathways are currently under debate. In situ methanogenesis linked to algae growth was recently suggested to be the major source of CH4 fluxes from aquatic systems. However, based on our very large data set on CH4 distributions within lakes, we demonstrate here that methane-enriched water from shallow water zones is the most likely source of the basin-wide mean CH4 concentrations in the surface water of lakes. Consistently, the mean surface CH4 concentrations are significantly correlated with the ratio between the surface area of the shallow water zone and the entire lake, fA,s/t, but not with the total surface area. The categorization of CH4 fluxes according to fA,s/t may therefore improve global estimates of CH4 emissions from lakes. Furthermore, CH4 concentrations increase substantially with water temperature, indicating that seasonally resolved data are required to accurately estimate annual CH4 emissions.

Subject (DDC)

570 Biosciences, Biology

Cite This

ISO 690

FERNÁNDEZ, Jorge Encinas, Frank PEETERS, Hilmar HOFMANN, 2016. On the methane paradox : transport from shallow water zones rather than in situ methanogenesis is the major source of CH4 in the open surface water of lakes. In: Journal of Geophysical Research: Biogeosciences. 121(10), pp. 2717-2726. ISSN 2169-8953. eISSN 2169-8961. Available under: doi: 10.1002/2016JG003586

BibTex

@article{Fernandez2016metha-36897,
  year={2016},
  doi={10.1002/2016JG003586},
  title={On the methane paradox : transport from shallow water zones rather than in situ methanogenesis is the major source of CH4 in the open surface water of lakes},
  number={10},
  volume={121},
  issn={2169-8953},
  journal={Journal of Geophysical Research: Biogeosciences},
  pages={2717--2726},
  author={Fernández, Jorge Encinas and Peeters, Frank and Hofmann, Hilmar}
}

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Bibliography of Konstanz

Yes