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

Kracher, D., Reick, C. H., Manzini, E., Schultz, M. G., & Stein, O. (2016). Climate change reduces warming potential of nitrous oxide by an enhanced Brewer-Dobson circulation. Geophysical Research Letters, 43, 5851-5859. doi:10.1002/2016GL068390.

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 Creators:
Kracher, Daniela1, Author
Reick, Christian H.1, Author           
Manzini, Elisa2, Author           
Schultz, Martin G., Author           
Stein, Olaf, Author           
Affiliations:
1Global Vegetation Modelling, The Land in the Earth System, MPI for Meteorology, Max Planck Society , ou_913562              
2Minerva Research Group Stratosphere and Climate, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, ou_2301693              

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Free keywords: Nitrous oxide, Brewer Dobson circulation, global warming potential, atmospheric lifetime, ECHAM, 1pctCO2
 Abstract: 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 acceleration is the enhanced transport of nitrous oxide (N2O) from its sources at the Earth's surface towards its main sink region in the stratosphere thus inducing a reduction in its lifetime. N2O is a potent greenhouse gas and the most relevant currently emitted ozone depleting substance. Here we examine the implications of a reduced N2O lifetime in the context of climate change. We find a decrease in its global warming potential (GWP) and, due to a decline in the atmospheric N2O burden, also a reduction in its total radiative forcing. From the idealized transient global warming simulation we can identify linear regressions for N2O sink, lifetime and GWP with temperature rise. Our findings are thus not restricted to a particular scenario.

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Language(s): eng - English
 Dates: 20162016-062016-06-16
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/2016GL068390
 Degree: -

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Title: Geophysical Research Letters
Source Genre: Journal
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Pages: - Volume / Issue: 43 Sequence Number: - Start / End Page: 5851 - 5859 Identifier: ISSN: 1944-8007