B13I:
Global Nitrous Oxide Budget: Magnitude, Sources, and Drivers II

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Session ID#: 15268

Session Description:
Nitrous oxide (N2O) emissions and atmospheric concentrations have been steadily growing for decades, yet large uncertainties remain on the magnitude, sources and controlling factors of emissions. In order to assess climate stabilization pathways consistent with the Paris climate agreement, improved understanding of the global N2O budget and its regular assessment are  imperative. Following the successful implementation of the CO2 (annually) and CH4 (intended biannually) budget reports, the Global Carbon Project has proposed to report the global N2O budget biannually through open collaboration and synthesis activities. This session aims to bring together studies to help quantify global and regional N2O budgets through the analysis of emissions inventories, field observations, terrestrial and ocean biogeochemical modeling, and atmospheric inverse modeling. This session is expected to contribute to the development of a biannual update of the global N2O budget. Abstracts using observations and modeling at multiple spatial and temporal scales are invited.
Primary Convener:  Hanqin Tian, Auburn University, International Center for Climate and Global Change Research, Auburn, AL, United States
Convener:  Rona Thompson, Norwegian Institute for Air Research, Kjeller, Norway
Chairs:  Rona Thompson, Norwegian Institute for Air Research, Kjeller, Norway and Hanqin Tian, Auburn University, International Center for Climate and Global Change Research, Auburn, AL, United States
OSPA Liaison:  Bowen Zhang, Auburn University, International Center for Climate and Global Change Research & School of Forestry and Wildlife Sciences, Auburn, AL, United States

Cross-Listed:
  • A - Atmospheric Sciences
  • GC - Global Environmental Change
  • PA - Public Affairs
Index Terms:

0315 Biosphere/atmosphere interactions [ATMOSPHERIC COMPOSITION AND STRUCTURE]
0469 Nitrogen cycling [BIOGEOSCIENCES]
0490 Trace gases [BIOGEOSCIENCES]
1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]

Abstracts Submitted to this Session:

The Global Nitrous Oxide Budget: A joint new activity of GCP and INI (194766)
Hanqin Tian, Auburn University, International Center for Climate and Global Change Research, Auburn, AL, United States, Rona Thompson, Norwegian Institute for Air Research, Kjeller, Norway, Josep Gili Canadell, CSIRO Ocean and Atmosphere, Canberra, ACT, Australia, Robert B Jackson, Stanford University, School of Earth, Energy, and Environmental Sciences, Stanford, CA, United States, Mark A Sutton, NERC Natural Environment Research Council, Swindon, United Kingdom and GCP-INI Team
Top-down Constraints on Global N2O Emissions at Optimal Spatial and Temporal Resolution (Invited) (163833)
Kelley C Wells1, Dylan B Millet1, Nicolas Bousserez2, Daven K Henze3 and Timothy J Griffis4, (1)University of Minnesota, Department of Soil, Water, and Climate, Saint Paul, United States, (2)University of Colorado at Boulder, Boulder, CO, United States, (3)University of Colorado Boulder, Boulder, United States, (4)University of Minnesota Twin Cities, Department of Soil, Water, and Climate, St. Paul, United States
Current understanding of sources and processes leading to nitrous oxide production from terrestrial ecosystems.  (191886)
Ute Maria Skiba1, Mark A Sutton1, Robert Martin Rees2 and Nicholas Cowan1, (1)NERC Natural Environment Research Council, Swindon, United Kingdom, (2)Organization Not Listed, Washington, DC, United States
Ocean N2O Emissions : Recent Global Estimates and Anthropogenically Influenced Changes (144619)
Parvadha Suntharalingam1, Erik Buithenuis2, Oliver Andrews2 and Corinne Le Quere1, (1)University of East Anglia, School of Environmental Sciences, Norwich, United Kingdom, (2)University of East Anglia, Tyndall Centre for Climate Change research, School of Environmental Sciences, Norwich, United Kingdom
Indirect Nitrous Oxide Emissions from Major Rivers in the World: Integration of a Process-based Model with Observational Data (190193)
Bowen Zhang1, Yuanzhi Yao2, Rongting Xu1, Jia Yang1, Zhuonan Wang1, Shufen Pan1 and Hanqin Tian3, (1)Auburn University, International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn, AL, United States, (2)Auburn University, International Center for Climate and Global Change Research, School of Forestry and Wildlife Sciences, Auburn, United States, (3)Auburn University, International Center for Climate and Global Change Research, Auburn, AL, United States
Slowdown of N2O emissions from China’s croplands (195864)
Feng Zhou1, Ziyin Shang1, Philippe Ciais2, Shilong Piao3, Hanqin Tian4, Eri Saikawa5, Soenke Zaehle6, Stephen J Del Grosso7 and James N Galloway8, (1)Peking University, Beijing, China, (2)LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette, France, (3)Peking University, Institute of Carbon Neutrality, Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Beijing, China, (4)Auburn University, Auburn, United States, (5)Emory University, Department of Environmental Sciences, Atlanta, GA, United States, (6)Max Planck Institute for Biogeochemistry, Jena, Germany, (7)USDA -ARS, Fort Collins, United States, (8)University of Virginia, Environmental Sciences, Charlottesville, VA, United States
Field and laboratory studies of the nitrogen and oxygen isotopic composition of N2O: Corona discharge production, biomass burning, and ocean and “Arctic hot spot” emissions (168852)
Kristie A Boering, University of California Berkeley, Chemistry and Earth & Planetary Science, Berkeley, CA, United States
Overview of the Global Nitrous Oxide Budget: The More We Think We Know, the Less We Really Know (Invited) (128841)
Eric A Davidson, University of Maryland Center for Environmental Science Appalachian Laboratory, Frostburg, MD, United States

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