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Nitrous Oxide (N2O): The Dominant Ozone-Depleting Substance Emitted in the 21st Century

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TLDR
In this paper, the ozone depletion potential-weighted anthropogenic emissions of N2O with those of other ozone-depleting substances were compared, and it was shown that N 2O emission currently is the single most important ozone-destroying emission and is expected to remain the largest throughout the 21st century.
Abstract
By comparing the ozone depletion potential-weighted anthropogenic emissions of N2O with those of other ozone-depleting substances, we show that N2O emission currently is the single most important ozone-depleting emission and is expected to remain the largest throughout the 21st century. N2O is unregulated by the Montreal Protocol. Limiting future N2O emissions would enhance the recovery of the ozone layer from its depleted state and would also reduce the anthropogenic forcing of the climate system, representing a win-win for both ozone and climate.

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Citations
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Journal ArticleDOI

A bet-hedging strategy for denitrifying bacteria curtails their release of N2O.

TL;DR: Bet hedging is demonstrated in Paracoccus denitrificans when facing hypoxia: a minority of the cells synthesize NIR + NOR, the N2O source, while all synthesizing NOS, theN2O sink, hence the population becomes a strong net sink for N2 O.
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Transient N2O accumulation and emission caused by O2 depletion in soil after liquid manure injection

TL;DR: In this paper, micro-scale distributions of O 2 and N 2 O in the soil were investigated to describe how nitrous oxide production within, and emission from, soils are regulated by anoxic volumes created by injection of liquid manure.
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Effects of grazing on N2O production potential and abundance of nitrifying and denitrifying microbial communities in meadow-steppe grassland in northern China

TL;DR: The results suggest that grazing induced grassland degradation may not necessarily be associated with a reduction in N2O emissions as reported in other semiarid grasslands in a more arid environment.
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Biokinetic Characterization and Activities of N2O-Reducing Bacteria in Response to Various Oxygen Levels.

TL;DR: In this paper, the authors used an O2 and N2O micro-respirometric system to compare the N 2O reduction kinetics of four strains, i.e., two strains of an Azospira sp. and Pseudomonas stutzeri and Paracoccus denitrificans, in the presence and absence of oxygen.
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Toward a Better Assessment of Biochar-Nitrous Oxide Mitigation Potential at the Field Scale.

TL;DR: This study shows yield benefits but no robust evidence for NO emission reductions by biochar under field conditions and discusses the need for future biochar field studies to investigate effects of fertilizer N form, sustained and biologically relevant changes in soil moisture, multiple biochars per site, and time since biochar application.
References
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Climate change 2007: the physical science basis

TL;DR: The first volume of the IPCC's Fourth Assessment Report as mentioned in this paper was published in 2007 and covers several topics including the extensive range of observations now available for the atmosphere and surface, changes in sea level, assesses the paleoclimatic perspective, climate change causes both natural and anthropogenic, and climate models for projections of global climate.
Journal ArticleDOI

The influence of nitrogen oxides on the atmospheric ozone content

TL;DR: In this paper, the probable importance of NO and NO2 in controlling the ozone concentrations and production rates in the stratosphere is pointed out and some processes which may lead to production of nitric acid are discussed.

Climate change 2007: Mitigation. Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Summary for Policymakers.

TL;DR: In this paper, the authors present a collection of essays by Terry Barker, Igor Bashmakov, Lenny Bernstein, Jean Bogner, Peter Bosch, Rutu Dave, Ogunlade Davidson, Brian Fisher, Michael Grubb, Sujata Gupta, Kirsten Halsnaes, BertJan Heij, Boubacarraoui, Shigeki Kobayashi, Mark Levine, Daniel Martino, Omar Masera Cerutti, Bert Metz, Leo Meyer, Gert-Jan Nabuurs, Adil Najam
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