Managing Global Resources for a Secure Future

2017 Annual Meeting | Oct. 22-25 | Tampa, FL

96 Special Session Symposium--How Can We Improve Our Estimates of Indirect N2O Emissions?

Oral Session
Special Sessions
This session is aimed at describing the current state of knowledge with regard to indirect nitrous oxide (N2O) emissions, which is currently one of the largest sources of uncertainty in greenhouse gas budgets for individual cropping systems, as well as for the entire agricultural sector.  Estimates of N2O emissions occurring directly from managed agricultural fields to the atmosphere have been well-constrained by a large number of studies.  In contrast, the indirect component that results from off-site transport of other reactive N species, and their subsequent conversion to N2O in downwind and downstream ecosystems, suffers from a much smaller set of studies as well as a number of methodological and conceptual challenges.  In this session, we hope to report recent experimental results and to discuss the key challenges that need to be addressed in order to reduce uncertainties. This is a cross-cutting special sessions among Agronomy, Environmental Science, Soil Science, and Crop Science groups involved in mitigating greenhouse gas emissions while sustaining or increasing crop yield and quality.
Cosponsor(s):

Soil Carbon and Greenhouse Gas Emissions Community

Monday, October 23, 2017: 1:30 PM-3:35 PM
Tampa Convention Center, Room 21

Moderator:
Rodney T. Venterea
Organizer:
Upendra M. Sainju
1:30 PM
Introductory Remarks
1:35 PM
Recent Daycent Model Development and Testing for N Gas Volatilization and Nitrate Leaching.
Stephen J. Del Grosso, USDA-ARS; William J. Parton, Colorado State University; Ram Gurung, Colorado State University
1:55 PM
Lessons from the Field: Insights for Modelling N2o Emissions from Riverine Ecosystems.
Helen Baulch, University of Saskatchewan; Madeline Rosamond, University of Waterloo; Jason Venkiteswaran, Wilfrid Laurier University; Sherry Schiff, University of Waterloo; Nick Dylla, University of Saskatchewan; Colin Whitfield, University of Saskatchewan
2:15 PM
2:35 PM
Top-Down Constraints on Regional-Scale Indirect N2O Emissions.
Tim Griffis, University of Minnesota; Zichong Chen, University of Minnesota; John M. Baker, University of Minnesota; Dylan B Millet, University of Minnesota; Congsheng Fu, Yale University; Xuhui Lee, Yale University; Jeff Wood, University of Minnesota; Peter A. Turner, University of Minnesota; Rodney Venterea, ARS
2:55 PM
Nitrous Oxide Emissions from Riverine Networks.
Alessandra Marzadri, University of Idaho; Daniele Tonina, University of Idaho; Alberto Bellin, University of Trento; Martha Dee, University of Notre Dame; Jennifer L Tank, University of Notre Dame
3:35 PM
Adjourn
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