B14A:
Closing the Global Nitrous Oxide Budget: Magnitude, Spatiotemporal Patterns, and Responses II


Session ID#: 9157

Session Description:
Atmospheric mixing ratios of nitrous oxide (N2O) substantially increased since the preindustrial era. Understanding the sources and magnitude of N2O as well as their historical responses to natural and anthropogenic driving forces is the key to effectively mitigate N2O emissions and climate change. This session aims at bringing together studies quantifying and predicting N2O emissions through the analysis of existing emissions inventories, empirical/statistical modeling, atmospheric inverse modeling and process-based ecosystem modeling. The objective of the session is to better constrain global and regional N2O budgets, understand the underlying mechanisms of spatiotemporal variations, and evaluate potential mitigation practices. Abstracts using observations and modeling at multiple spatial and temporal scales are invited.
Primary Convener:  Hanqin Tian, Auburn University, Auburn, AL, United States
Conveners:  Chaoqun Lu, Iowa Sate University, Ames, United States, Eri Saikawa, Emory University, Department of Environmental Sciences, Atlanta, GA, United States and Akihiko Ito, NIES National Institute of Environmental Studies, Ibaraki, Japan
Chairs:  Hanqin Tian, Auburn University, Auburn, AL, United States and Eri Saikawa, Emory University, Department of Environmental Sciences, Atlanta, GA, United States
OSPA Liaison:  Chaoqun Lu, Iowa Sate University, Ames, United States

Cross-Listed:
  • A - Atmospheric Sciences
  • GC - Global Environmental Change
Co-Sponsor(s):
  • IGBP: International Geosphere-Biosphere Programme -
Index Terms:

0315 Biosphere/atmosphere interactions [ATMOSPHERIC COMPOSITION AND STRUCTURE]
0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
0469 Nitrogen cycling [BIOGEOSCIENCES]
0490 Trace gases [BIOGEOSCIENCES]

Abstracts Submitted to this Session:

Nitrous Oxide: A Greenhouse Gas That is Also an Ozone Layer Depleting Gas (Invited) (75847)
A R Ravishankara, Colorado State University, Chemistry and Atmospheric Science, Fort Collins, CO, United States
The Soil Sink for Nitrous Oxide: Trivial Amount but Challenging Question (Invited) (63566)
Eric A Davidson1, Kathleen E Savage2 and Debjani Sihi1, (1)University of Maryland Center (UMCES) for Environmental Science, Frostburg, MD, United States, (2)Woodwell Climate Research Center, Falmouth, United States
Incomplete Denitrification Causes Rapid Nitrous Oxide Cycling in the Oceanic Oxygen Minimum Zones (Invited) (60587)
Andrew R Babbin, Massachusetts Institute of Technology, EAPS, Cambridge, United States; Princeton University, Geosciences, Princeton, NJ, United States, Bess B Ward, Princeton University, Department of Geosciences, Princeton, NJ, United States and Roman Stocker, ETH Zurich, Zurich, Switzerland; Massachusetts Institute of Technology, Cambridge, MA, United States
N2O Emission Trends From a Global Atmospheric Inversion (Invited) (60228)
Rona Thompson, Norwegian Institute for Air Research, Kjeller, Norway, Frederic Chevallier, Institut Pierre Simon Laplace, LSCE, Gif-sur-Yvette Cedex, France, Soenke Zaehle, Max Planck Institute for Biogeochemistry, Jena, Germany and Edward J Dlugokencky, NOAA, Global Monitoring Laboratory, Boulder, United States
Global observation of nitrous oxide: changes in growth rate and spatial patterns (76216)
Brad David Hall1, Edward J Dlugokencky2, Geoffrey S Dutton3, Jon David Nance4, Andrew M Crotwell3, Debra Jean Mondeel5 and James W Elkins1, (1)NOAA/ESRL GMD, Boulder, CO, United States, (2)NOAA Boulder, Global Monitoring Laboratory, Boulder, United States, (3)Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States, (4)Cooperative Institute for Research in Environmental Sciences (CIRES), NOAA/GML, Boulder, United States, (5)US Dept Commerce, Boulder, CO, United States
Historical Pattern and Future Trajectories of Terrestrial N2O Emission driven by Multi-factor Global Changes (85936)
Chaoqun Lu1,2, Hanqin Tian3, Jia Yang4, Bowen Zhang4 and Rongting Xu4, (1)Iowa Sate University, Ames, United States, (2)Iowa State University, Department of Ecology, Evolution, and Organismal Biology, Ames, IA, United States, (3)Auburn University, Auburn, AL, United States, (4)Auburn University, International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn, AL, United States
Development of new historical global Nitrogen fertilizer map and the evaluation of their impacts on terrestrial N cycling and the evaluation of their impacts on terrestrial N cycling (65766)
Dr. Kazuya Nishina1, Akihiko Ito1 and Seiji Hayashi2, (1)NIES National Institute of Environmental Studies, Ibaraki, Japan, (2)National Institute for Environmental Studies, Miharu, Fukushima, Japan
Nitrous oxide (N2O) fluxes from soils under different land use in Brazil – Overview, measurements, and modeling (64371)
Katharina Hildegard Elisabeth Meurer1, Uwe Franko2, Oliver Spott2, Claus F. Stange3 and Hermann F. Jungkunst4,5, (1)University of Göttingen, Göttingen, Germany, (2)Helmholtz Centre for Environmental Research, Soil Physics, Halle (Saale), Germany, (3)Federal Institute for Geosciences and Natural Resources, Hannover, Germany, (4)University of Koblenz-Landau, Environemtnal Sciences, Landau (Pfalz), Germany, (5)University of Koblenz-Landau, Environmental Sciences, Landau (Pfalz), Germany

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