Atmospheric methane removal: a research agenda

Jackson, Robert B.; Abernethy, Sam; Canadell, Josep G.; Cargnello, Matteo; Davis, Steven J.; Féron, Sarah; Fuss, Sabine; Heyer, A.; Hong, Chaopeng; Jones, Chris D.; Matthews, H. Damon; O’Connor, Fiona M.; Pisciotta, Maxwell; Rhoda, Hannah M.; Richter, Renaud de; Solomon, Edward I.; Wilcox, Jennifer; Zickfeld, Kirsten

doi:10.1098/rsta.2020.0454

Cited by 73 publications

(76 citation statements)

References 107 publications

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“…In the Summary for Policymakers, the Sixth Assessment Report of Working Group 1 of the Intergovernmental Panel on Climate Change advocated 'Strong, rapid and sustained reductions in CH 4 emissions' [2]. While cutting the methane burden is urgent and very beneficial [3,4], methane that has already been emitted can be removed from the air [5][6][7].…”

Section: Introduction: Questionsmentioning

confidence: 99%

Is the destruction or removal of atmospheric methane a worthwhile option?

Nisbet‐Jones

Fisher

France

et al. 2021

Phil. Trans. R. Soc. A.

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Removing methane from the air is possible, but do the costs outweigh the benefits? This note explores the question of whether removing methane from the atmosphere is justifiable. Destruction of methane by oxidation to CO 2 eliminates 97% of the warming impact on a 100-yr time scale. Methane can be oxidized by a variety of methods including thermal or ultraviolet photocatalysis and various processes of physical, chemical or biological oxidizers. Each removal method has energy costs (with the risk of causing embedded CO 2 emission that cancel the global warming gain), but in specific circumstances, including settings where air with high methane is habitually present, removal may be competitive with direct efforts to cut fugitive methane leaks. In all cases however, great care must be taken to ensure that the destruction has a net positive impact on the total global warming, and that the resources required would not be better used for stopping the methane from being emitted. This article is part of a discussion meeting issue ‘Rising methane: is warming feeding warming? (part 2)’.

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Section: Introduction: Questionsmentioning

confidence: 99%

Is the destruction or removal of atmospheric methane a worthwhile option?

Nisbet‐Jones

Fisher

France

et al. 2021

Phil. Trans. R. Soc. A.

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“…Cutting methane emission is broadly cost-effective compared to methane removal from ambient air [94], though with appropriate technology in appropriate high methane settings, removal may indeed be an option [95,96]. Jackson et al [97] point in particular to the need to more research into removal methods.…”

Section: Can Mitigation Succeed In Cutting Emissions To Net Zero?mentioning

confidence: 99%

Atmospheric methane and nitrous oxide: challenges alongthe path to Net Zero

Nisbet

Fisher

Lowry

et al. 2021

Phil. Trans. R. Soc. A.

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The causes of methane's renewed rise since 2007, accelerated growth from 2014 and record rise in 2020, concurrent with an isotopic shift to values more depleted in 13 C, remain poorly understood. This rise is the dominant departure from greenhouse gas scenarios that limit global heating to less than 2°C. Thus a comprehensive understanding of methane sources and sinks, their trends and inter-annual variations are becoming more urgent. Efforts to quantify both sources and sinks and understand latitudinal and seasonal variations will improve our understanding of the methane cycle and its anthropogenic component. Nationally declared emissions inventories under the UN Framework Convention on Climate Change (UNFCCC) and promised contributions to emissions reductions under the UNFCCC Paris Agreement need to be verified independently by top-down observation. Furthermore, indirect effects on natural emissions, such as changes in aquatic ecosystems, also need to be quantified. Nitrous oxide is even more poorly understood. Despite this, options for mitigating methane and nitrous oxide emissions are improving rapidly, both in cutting emissions from gas, oil and coal extraction and use, and also from agricultural and waste sources. Reductions in methane and nitrous oxide emission are arguably among the most attractive immediate options for climate action. This article is part of a discussion meeting issue 'Rising methane: is warming feeding warming? (part 1)'.

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“…In the agricultural field, intestinal fermentation and manure of livestock are the largest sources of emissions along with rice paddies. Rice is mostly grown in freshwater paddies under anaerobic conditions and accounts for about 10% of total methane emissions [3,34,35]. During the flooding period of the paddy soil, various organic matter is decomposed by methane generating archaea in an anaerobic state producing methane [36,37].…”

Section: Agriculture and Greenhouse Gas Emissionmentioning

confidence: 99%

“…Methane is a potent greenhouse gas with 28 times global warming potential compared to carbon dioxide with atmospheric methane concentration continuously increasing [2]. The average global concentration continues to rise with 600 Tg CH 4 yr -1 for global methane emissions, of which, 61% is attributed to anthropogenic sources recorded in the year 2020 [3]. Methane emission varies under different soil types particularly those under aerobic and anaerobic conditions.…”

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confidence: 99%

Methanogenesis and Methane Oxidation in Paddy Fields under Organic Fertilization

Kim¹,

Walitang²,

Sa³

2021

Korean Journal of Environmental Agriculture

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BACKGROUND: Global warming is one of the most pressing environmental issues which concomitantly complicates global climate change. Methane emission is a balance between methanogenesis and methane consumption, both of which are driven by microbial actions in different ecosystems producing methane, one of the major greenhouse gases. Paddy fields are major sources of anthropogenic methane emissions and could be compounded by organic fertilization. METHODS AND RESULTS: Literature reviews were conducted to give an overview of the global warming conditions and to present the relationship of carbon and methane to greenhouse gas emissions, and the need to understand the underlying processes of methane emission. A more extensive review was done from studies on methane emission in paddy fields under organic fertilization with greater emphasis on long term amendments. Changes in paddy soils due to organic fertilization include alterations of the physicochemical properties and changes in biological components. There are diverse phylogenetic groups of methanogens and methane oxidizing bacteria involved in methane emission. Also, multiple factors influence methanogenesis and methane oxidation in rice paddy fields under organic fertilization and they should be greatly considered when developing mitigating steps in methane emission in paddy fields especially under long term organic fertilization. CONCLUSION(S): This review showed that organic fertilization, particularly for long term management practices, influenced both physicochemical and biological components of the paddy fields which could ultimately affect methanogenesis, methane oxidation, and methane emission. Understanding interrelated factors affecting methane emission helps create ways to mitigate their impact on global warming and climate change.

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Atmospheric methane removal: a research agenda

Cited by 73 publications

References 107 publications

Is the destruction or removal of atmospheric methane a worthwhile option?

Is the destruction or removal of atmospheric methane a worthwhile option?

Atmospheric methane and nitrous oxide: challenges alongthe path to Net Zero

Methanogenesis and Methane Oxidation in Paddy Fields under Organic Fertilization

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