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Quantifying nitrous oxide emissions in the U.S. Midwest - A top‐down study using high resolution airborne in situ observations

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. (2021) Quantifying nitrous oxide emissions in the U.S. Midwest - A top‐down study using high resolution airborne in situ observations. Geophysical Research Letters, 48 (5), e2020GL091266. Wiley. doi: 10.1029/2020GL091266. ISSN 0094-8276.

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Official URL: http://dx.doi.org/10.1029/2020GL091266

Abstract

The densely farmed U.S. Midwest is a prominent source of nitrous oxide (N2O) but top‐down and bottom‐up N2O emission estimates differ significantly. We quantify Midwest N2O emissions by combining observations from the Atmospheric Carbon and Transport‐America campaign with model simulations to scale the Emissions Database for Global Atmospheric Research (EDGAR). In October 2017 we scaled agricultural EDGAR v4.3.2 and v5.0 emissions by factors of 6.3 and 3.5, respectively, resulting in 0.42 nmol m−2 s−1 Midwest N2O emissions. In June/July 2019, a period when extreme flooding was occurring in the Midwest, agricultural scaling factors were 11.4 (v4.3.2) and 9.9 (v5.0), resulting in 1.06 nmol m−2 s−1 Midwest emissions. Uncertainties are on the order of 50 %. Agricultural emissions estimated with the process‐based model DayCent (Daily version of the CENTURY ecosystem model) were larger than in EDGAR but still substantially smaller than our estimates. The complexity of N2O emissions demands further studies to fully characterize Midwest emissions.

Item URL in elib:https://elib.dlr.de/141280/
Document Type:Article
Title:Quantifying nitrous oxide emissions in the U.S. Midwest - A top‐down study using high resolution airborne in situ observations
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Eckl, MaximilianDLR, IPAhttps://orcid.org/0000-0001-5876-7392
Roiger, AnkeDLR, IPAUNSPECIFIED
Kostinek, JulianDLR, IPAUNSPECIFIED
Fiehn, AlinaDLR, IPAhttps://orcid.org/0000-0003-3376-4405
Huntrieser, HeidiDLR, IPAhttps://orcid.org/0000-0001-8046-1859
Knote, ChristophMeteorological Institute, Ludwig-Maximilians-Universität, Munich, Germanyhttps://orcid.org/0000-0001-9105-9179
Barkley, Zachary R.The Pennsylvania State Universityhttps://orcid.org/0000-0002-1731-4685
Ogle, S.Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO 80523, USAUNSPECIFIED
Baier, Bianca C.Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, USAhttps://orcid.org/0000-0003-0379-9180
Sweeney, ColmNOAA Global Monitoring Laboratory, Boulder, CO, USAUNSPECIFIED
Davis, Kenneth J.Pennsylvania State Univ., University Park, VA, USAhttps://orcid.org/0000-0002-1992-8381
Date:14 January 2021
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:48
DOI :10.1029/2020GL091266
Page Range:e2020GL091266
Publisher:Wiley
ISSN:0094-8276
Status:Published
Keywords:nitrous oxide, top‐down, agriculture, flux estimate, climate change, Midwest
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Atmospheric and climate research
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Eckl, Maximilian
Deposited On:18 Mar 2021 15:01
Last Modified:18 Mar 2021 15:01

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