Eckl, Maximilian and Roiger, Anke and Kostinek, Julian and Fiehn, Alina and Huntrieser, Heidi and Knote, Christoph and Barkley, Zachary R. and Ogle, S. and Baier, Bianca C. and Sweeney, Colm and Davis, Kenneth J. (2020) Quantifying nitrous oxide emissions in the U.S. Midwest – A top-down study. In: Earth and Space Science Open Archive. AGU 2020 Fall Meeting, 2020-12-01 - 2020-12-17, online. doi: 10.1002/essoar.10505820.1.
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Abstract
Nitrous oxide (N2O), a potent greenhouse gas and ozone depleting substance, plays a crucial role in the atmosphere. Anthropogenic emissions from agriculture contribute to a rising trend in global N2O emissions and atmospheric concentrations. However, due to insufficient direct observations, regional N2O emissions derived in bottom-up and top-down studies are highly uncertain. The U.S. Midwest is one of the most intensive agriculture areas worldwide and hence may contribute significantly to the observed trend. Recent top-down studies suggest that bottom-up estimates underestimate agricultural emissions in that area by up to an order of magnitude. Here we quantify nitrous oxide emissions in the Midwest in October 2017 and June-July 2019 with a top-down approach. Unique continuous aircraft-based measurements of N2O conducted during the ACT-America campaign together with forward WRF-Chem model simulations are used to scale the EDGAR inventory thus quantifying emissions. On average we had to upscale October 2017 and June-July 2019 agricultural EDGAR 4.3.2/5.0 emissions by a factor of 6.3/3.5 and 11.4/9.9, resulting in 0.42 nmol m-2 s-1 and 1.06 nmol m-2 s-1 emissions in the Midwest, respectively. Finally, calculations of direct soil N2O emissions from the DayCent biogeochemical model are compared to our estimates.
Item URL in elib: | https://elib.dlr.de/146147/ | ||||||||||||||||||||||||||||||||||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||||||||||||||||||||||||||||||||||
Title: | Quantifying nitrous oxide emissions in the U.S. Midwest – A top-down study | ||||||||||||||||||||||||||||||||||||||||||||||||
Authors: |
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Date: | 11 December 2020 | ||||||||||||||||||||||||||||||||||||||||||||||||
Journal or Publication Title: | Earth and Space Science Open Archive | ||||||||||||||||||||||||||||||||||||||||||||||||
Refereed publication: | No | ||||||||||||||||||||||||||||||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||||||||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||||||||||||||||||||||||||
In SCOPUS: | No | ||||||||||||||||||||||||||||||||||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||||||||||||||||||||||||||||||||||
DOI: | 10.1002/essoar.10505820.1 | ||||||||||||||||||||||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||||||||||||||||||||||
Keywords: | nitrous oxide, agricultural emissions, airborne measurements, top-down study, greenhouse gas | ||||||||||||||||||||||||||||||||||||||||||||||||
Event Title: | AGU 2020 Fall Meeting | ||||||||||||||||||||||||||||||||||||||||||||||||
Event Location: | online | ||||||||||||||||||||||||||||||||||||||||||||||||
Event Type: | international Conference | ||||||||||||||||||||||||||||||||||||||||||||||||
Event Start Date: | 1 December 2020 | ||||||||||||||||||||||||||||||||||||||||||||||||
Event End Date: | 17 December 2020 | ||||||||||||||||||||||||||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||||||||||||||||||||||||||||||
HGF - Program: | Aeronautics | ||||||||||||||||||||||||||||||||||||||||||||||||
HGF - Program Themes: | Air Transportation and Impact | ||||||||||||||||||||||||||||||||||||||||||||||||
DLR - Research area: | Aeronautics | ||||||||||||||||||||||||||||||||||||||||||||||||
DLR - Program: | L AI - Air Transportation and Impact | ||||||||||||||||||||||||||||||||||||||||||||||||
DLR - Research theme (Project): | L - Climate, Weather and Environment | ||||||||||||||||||||||||||||||||||||||||||||||||
Location: | Oberpfaffenhofen | ||||||||||||||||||||||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Atmospheric Physics > Atmospheric Trace Species | ||||||||||||||||||||||||||||||||||||||||||||||||
Deposited By: | Eckl, Maximilian | ||||||||||||||||||||||||||||||||||||||||||||||||
Deposited On: | 25 Nov 2021 08:00 | ||||||||||||||||||||||||||||||||||||||||||||||||
Last Modified: | 24 Apr 2024 20:45 |
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