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

@article{Ravishankara2009NitrousO,
  title={Nitrous Oxide (N2O): The Dominant Ozone-Depleting Substance Emitted in the 21st Century},
  author={Akkihebbal R. Ravishankara and John Daniel and Robert W. Portmann},
  journal={Science},
  year={2009},
  volume={326},
  pages={123 - 125}
}
Unwelcome Dominance Stratospheric ozone is depleted by many different chemicals; most prominently, chlorofluorocarbons (CFCs) responsible for causing the Antarctic ozone hole. Nitrous oxide is also an ozone-depleting substance that has natural sources in addition to anthropogenic ones. Moreover, unlike CFCs, its use and emission are not regulated by the Montreal Protocol, which has helped to reverse the rate of growth of the ozone hole. Surprisingly, Ravishankara et al. (p. 123, published… 

The changing ozone depletion potential of N2O in a future climate

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The report by Ravishankara et al. on page 123 of this issue (1) not only adds to the scientific understanding of this important gas, but is a strong reminder that nitrous oxide deserves much more attention and consideration for policy action to control future human-related emissions.

The effectiveness of N2O in depleting stratospheric ozone

Recently, it was shown that of the ozone‐depleting substances currently emitted, N2O emissions (the primary source of stratospheric NOx) dominate, and are likely to do so throughout the 21st century.

Impact of future nitrous oxide and carbon dioxide emissions on the stratospheric ozone layer

The atmospheric levels of human-produced chlorocarbons and bromocarbons are projected to make only small contributions to ozone depletion by 2100. Increases in carbon dioxide (CO2) and nitrous oxide

The Role of Nitrous Oxide on Climate Change

Nitrous oxide is the third most important anthropogenic greenhouse gas in the atmosphere, contributing about 6% to the radiative forcing by long-lived greenhouse gases. In addition to its role as

Reducing nitrous oxide emissions to mitigate climate change and protect the ozone layer.

The results show that from 1990 to 2012, industrial N2O emissions in China grew by some 37-fold, with total accumulated emissions of 1.26 Tg, and from 2012 to 2020, the projected emissions are expected to continue growing rapidly from 174 to 561 Gg under current policies and assuming no additional mitigation measures.

The impact of the rise in atmospheric nitrous oxide on stratospheric ozone

It is known that atmospheric N2O, which is present in the atmosphere in 2020 at a mixing ratio of 332.8 ppb, is not only important for stratospheric ozone but also constitutes the third most important long-lived greenhouse gas (after CO2 and CH4).

Climate change reduces warming potential of nitrous oxide by an enhanced Brewer‐Dobson circulation

The Brewer‐Dobson circulation (BDC), which is an important driver of the stratosphere‐troposphere exchange, is expected to accelerate with climate change. One particular consequence of this

Massive nitrous oxide emissions from the tropical South Pacific Ocean

Nitrous oxide is a potent greenhouse gas and a key compound in stratospheric ozone depletion. In the ocean, nitrous oxide is produced at intermediate depths through nitrification and denitrification,
...

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