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Title: Reduced Snow Cover Increases Wintertime Nitrous Oxide (N2O) Emissions from an Agricultural Soil in the Upper U.S. Midwest

Journal Article · · Ecosystems
 [1];  [1]
  1. Michigan State Univ., East Lansing, MI (United States). W.K. Kellogg Biological Station; Michigan State Univ., East Lansing, MI (United States). Great Lakes Bioenergy Research Center and Dept. of Plant, Soil and Microbial Sciences

Throughout most of the northern hemisphere, snow cover decreased in almost every winter month from 1967 to 2012. Because snow is an effective insulator, snow cover loss has likely enhanced soil freezing and the frequency of soil freeze–thaw cycles, which can disrupt soil nitrogen dynamics including the production of nitrous oxide (N2O). Here, we used replicated automated gas flux chambers deployed in an annual cropping system in the upper Midwest US for three winters (December–March, 2011–2013) to examine the effects of snow removal and additions on N2O fluxes. Diminished snow cover resulted in increased N2O emissions each year; over the entire experiment, cumulative emissions in plots with snow removed were 69% higher than in ambient snow control plots and 95% higher than in plots that received additional snow (P < 0.001). Higher emissions coincided with a greater number of freeze–thaw cycles that broke up soil macroaggregates (250–8000 µm) and significantly increased soil inorganic nitrogen pools. We conclude that winters with less snow cover can be expected to accelerate N2O fluxes from agricultural soils subject to wintertime freezing.

Research Organization:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
FC02-07ER64494
OSTI ID:
1418519
Journal Information:
Ecosystems, Vol. 20, Issue 5; ISSN 1432-9840
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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Data from: Reduced snow cover increases wintertime nitrous oxide (N2O) emissions from an agricultural soil in the upper U.S. midwest
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dataset November 2016
Data from: Reduced snow cover increases wintertime nitrous oxide (N2O) emissions from an agricultural soil in the upper U.S. Midwest dataset November 2016
Data from: Reduced snow cover increases wintertime nitrous oxide (N2O) emissions from an agricultural soil in the upper U.S. Midwest dataset March 2018
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Data from: Reduced snow cover increases wintertime nitrous oxide (N2O) emissions from an agricultural soil in the upper U.S. Midwest dataset March 2018
Data from: Initial nitrous oxide, carbon dioxide, and methane costs of converting conservation reserve program grassland to row crops under no-till vs. conventional tillage dataset January 2019
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Cited By (8)

Reduced snow cover changes nitrogen use in canopy and understory vegetation during the subsequent growing season journal March 2019
Globally important nitrous oxide emissions from croplands induced by freeze–thaw cycles journal March 2017
Lakes as nitrous oxide sources in the boreal landscape journal January 2020
Environmental factors function as constraints on soil nitrous oxide fluxes in bioenergy feedstock cropping systems journal October 2018
Cellulosic biofuel contributions to a sustainable energy future: Choices and outcomes journal June 2017
Data from: Reduced snow cover increases wintertime nitrous oxide (N2O) emissions from an agricultural soil in the upper U.S. midwest
  • Ruan, Leilei; Robertson, G. Philip
  • Dryad Digital Repository-Supplementary information for journal article at DOI: 10.1007/s10021-016-0077-9, 1 XLSX file (3.553 Mb) https://doi.org/10.5061/dryad.9c7s3.1
dataset November 2016
Data from: Reduced snow cover increases wintertime nitrous oxide (N2O) emissions from an agricultural soil in the upper U.S. Midwest dataset November 2016
Data from: Reduced snow cover increases wintertime nitrous oxide (N2O) emissions from an agricultural soil in the upper U.S. Midwest dataset March 2018


Figures / Tables (8)