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A gap in nitrous oxide emission reporting complicates long-term climate mitigation

Nitrous oxide (N(2)O) is an important greenhouse gas (GHG) that also contributes to depletion of ozone in the stratosphere. Agricultural soils account for about 60% of anthropogenic N(2)O emissions. Most national GHG reporting to the United Nations Framework Convention on Climate Change assumes nitr...

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Autores principales: Del Grosso, Stephen J., Ogle, Stephen M., Nevison, Cynthia, Gurung, Ram, Parton, William J., Wagner-Riddle, Claudia, Smith, Ward, Winiwarter, Wilfried, Grant, Brian, Tenuta, Mario, Marx, Ernie, Spencer, Shannon, Williams, Stephen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: National Academy of Sciences 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9351463/
https://www.ncbi.nlm.nih.gov/pubmed/35878021
http://dx.doi.org/10.1073/pnas.2200354119
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author Del Grosso, Stephen J.
Ogle, Stephen M.
Nevison, Cynthia
Gurung, Ram
Parton, William J.
Wagner-Riddle, Claudia
Smith, Ward
Winiwarter, Wilfried
Grant, Brian
Tenuta, Mario
Marx, Ernie
Spencer, Shannon
Williams, Stephen
author_facet Del Grosso, Stephen J.
Ogle, Stephen M.
Nevison, Cynthia
Gurung, Ram
Parton, William J.
Wagner-Riddle, Claudia
Smith, Ward
Winiwarter, Wilfried
Grant, Brian
Tenuta, Mario
Marx, Ernie
Spencer, Shannon
Williams, Stephen
author_sort Del Grosso, Stephen J.
collection PubMed
description Nitrous oxide (N(2)O) is an important greenhouse gas (GHG) that also contributes to depletion of ozone in the stratosphere. Agricultural soils account for about 60% of anthropogenic N(2)O emissions. Most national GHG reporting to the United Nations Framework Convention on Climate Change assumes nitrogen (N) additions drive emissions during the growing season, but soil freezing and thawing during spring is also an important driver in cold climates. We show that both atmospheric inversions and newly implemented bottom-up modeling approaches exhibit large N(2)O pulses in the northcentral region of the United States during early spring and this increases annual N(2)O emissions from croplands and grasslands reported in the national GHG inventory by 6 to 16%. Considering this, emission accounting in cold climate regions is very likely underestimated in most national reporting frameworks. Current commitments related to the Paris Agreement and COP26 emphasize reductions of carbon compounds. Assuming these targets are met, the importance of accurately accounting and mitigating N(2)O increases once CO(2) and CH(4) are phased out. Hence, the N(2)O emission underestimate introduces additional risks into meeting long-term climate goals.
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spelling pubmed-93514632023-01-25 A gap in nitrous oxide emission reporting complicates long-term climate mitigation Del Grosso, Stephen J. Ogle, Stephen M. Nevison, Cynthia Gurung, Ram Parton, William J. Wagner-Riddle, Claudia Smith, Ward Winiwarter, Wilfried Grant, Brian Tenuta, Mario Marx, Ernie Spencer, Shannon Williams, Stephen Proc Natl Acad Sci U S A Biological Sciences Nitrous oxide (N(2)O) is an important greenhouse gas (GHG) that also contributes to depletion of ozone in the stratosphere. Agricultural soils account for about 60% of anthropogenic N(2)O emissions. Most national GHG reporting to the United Nations Framework Convention on Climate Change assumes nitrogen (N) additions drive emissions during the growing season, but soil freezing and thawing during spring is also an important driver in cold climates. We show that both atmospheric inversions and newly implemented bottom-up modeling approaches exhibit large N(2)O pulses in the northcentral region of the United States during early spring and this increases annual N(2)O emissions from croplands and grasslands reported in the national GHG inventory by 6 to 16%. Considering this, emission accounting in cold climate regions is very likely underestimated in most national reporting frameworks. Current commitments related to the Paris Agreement and COP26 emphasize reductions of carbon compounds. Assuming these targets are met, the importance of accurately accounting and mitigating N(2)O increases once CO(2) and CH(4) are phased out. Hence, the N(2)O emission underestimate introduces additional risks into meeting long-term climate goals. National Academy of Sciences 2022-07-25 2022-08-02 /pmc/articles/PMC9351463/ /pubmed/35878021 http://dx.doi.org/10.1073/pnas.2200354119 Text en Copyright © 2022 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/This article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) .
spellingShingle Biological Sciences
Del Grosso, Stephen J.
Ogle, Stephen M.
Nevison, Cynthia
Gurung, Ram
Parton, William J.
Wagner-Riddle, Claudia
Smith, Ward
Winiwarter, Wilfried
Grant, Brian
Tenuta, Mario
Marx, Ernie
Spencer, Shannon
Williams, Stephen
A gap in nitrous oxide emission reporting complicates long-term climate mitigation
title A gap in nitrous oxide emission reporting complicates long-term climate mitigation
title_full A gap in nitrous oxide emission reporting complicates long-term climate mitigation
title_fullStr A gap in nitrous oxide emission reporting complicates long-term climate mitigation
title_full_unstemmed A gap in nitrous oxide emission reporting complicates long-term climate mitigation
title_short A gap in nitrous oxide emission reporting complicates long-term climate mitigation
title_sort gap in nitrous oxide emission reporting complicates long-term climate mitigation
topic Biological Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9351463/
https://www.ncbi.nlm.nih.gov/pubmed/35878021
http://dx.doi.org/10.1073/pnas.2200354119
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