Anthropogenic-estuarine interactions cause disproportionate greenhouse gas production: a review of the evidence base

Brown, Alison M.; Bass, Adrian M.; Pickard, Amy E. ORCID: 2022 Anthropogenic-estuarine interactions cause disproportionate greenhouse gas production: a review of the evidence base. Marine Pollution Bulletin, 174, 113240. 16, pp.

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Biologically productive regions such as estuaries and coastal areas, even though they only cover a small percentage of the world's oceans, contribute significantly to methane and nitrous oxide emissions. This paper synthesises greenhouse gas data measured in UK estuary studies, highlighting that urban wastewater loading is significantly correlated with both methane (PÂ <Â 0.001) and nitrous oxide (PÂ <Â 0.005) concentrations. It demonstrates that specific estuary typologies render them more sensitive to anthropogenic influences on greenhouse gas production, particularly estuaries that experience low oxygen levels due to reduced mixing and stratification or high sediment oxygen demand. Significantly, we find that estuaries with high urban wastewater loading may be hidden sources of greenhouse gases globally. Synthesising available information, a conceptual model for greenhouse gas concentrations in estuaries with different morphologies and mixing regimes is presented. Applications of this model should help identification of estuaries susceptible to anthropogenic impacts and potential hotspots for greenhouse gas emissions.

Item Type: Publication - Article
Digital Object Identifier (DOI):
UKCEH and CEH Sections/Science Areas: Water Resources (Science Area 2017-)
ISSN: 0025-326X
Additional Information. Not used in RCUK Gateway to Research.: Open Access paper - full text available via Official URL link.
Additional Keywords: greenhouse gas, nitrous oxide, methane, estuary, salt-wedge, fully-mixed, nutrients, urban wastewater, ammonium, nitrate, nitrite, phosphate, tidal range, river flow
NORA Subject Terms: Ecology and Environment
Atmospheric Sciences
Date made live: 01 Feb 2022 15:56 +0 (UTC)

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