Fourth Worshop on Atmospheric Oxygen (WAO4)
Bowdoin College, Brunswick, Maine, U.S.A. 23-25 August 2023

 

WAO4 Group Photo.jpg

 

 

The fourth APO Workshop was renamed to the Fourth Workshop on Atmospheric Oxygen (WAO4), in recognition that our community and the associated research foci have expanded.

 

This workshop was held over 3 days from 23-25 August 2023, hosted by Mark Battle, at Bowdoin College, Brunswick, Maine, U.S.A. There were 26 oral presentations, one poster (from a participant unable to attend in-person), and lots of engaging discussion among the 24 in-person participants, and several people engaging online.

 

 

Below you can find links to the Workshop abstracts, agenda, and PDFs of the presentations.

 

Abstracts

 

Agenda

 

Presentations

 

Wednesday 23rd August 2023  
Ralph Keeling
Scripps Institution of Oceanography, UCSD, USA		 An overview of opportunities and challenges for atmospheric O2/N2 measurements
John Miller
NOAA Global Monitoring Laboratory, USA		 What can we learn from measurements of 13C:12C and 14C:C in atmospheric CO2?
Tim Lueker
Scripps Institution of Oceanography, UCSD, USA		 Improvements to reference gas cylinder production and calibration at Scripps
Nobuyuki Aoki
National Metrology Institute of Japan / National Institute of Advanced Industrial Science and Technology, Japan		 Evaluation of an influence of the atmospheric minor components on the precise atmospheric oxygen measurements
Edie Salzig
Bowdoin College, USA		 Improving the Precision of the Bowdoin/Harvard Forest Dataset ex post facto
Markus Eritt
ICOS Central Analytical Laboratory, Germany		 O2/N2 measurements in the ICOS network
Andrew Manning
University of East Anglia, UK		 Results from the “GOLLUM” intercomparison programme
Ingrid Luijkx
Wageningen University / University of Groningen, The Netherlands		 Using atmospheric oxygen in the global carbon budget and monitoring systems
Elena Kozlova (presented by Andy Watson)
University of Exeter, UK		 What can Atmospheric Potential Oxygen tell us about the ocean carbon sink?
Nico Mayot (presented by Andrew Manning)
University of East Anglia, UK		 Global budget imbalances in O2 and APO, and Constraining the Southern Ocean CO2 sink variability with observation-based O2 fluxes
Mark Battle
Bowdoin College, USA		 Toward a more complete O2 budget: The impact of processing metal oxides and sulfur
Thursday 24th August 2023  
Britt Stephens
National Centre for Atmospheric Research, USA		 The APO Forward Model Intercomparison Experiment
Changyu Li
Lanzhou University, China		 Air-sea O2 flux and its influence on the ocean oxygen cycle
Christian Rödenbeck (presented by Penelope Pickers)
Max Planck Institute for Biogeochemistry, Germany (University of East Anglia, UK)		 The suitability of atmospheric oxygen measurements to constrain Western European fossil-fuel CO2 emissions and their trends
Anh Tran
Max Planck Institute for Biogeochemistry, Germany		 Atmospheric oxygen measurements across the Atlantic Ocean
Yasunori Tohjima
National Institute for Environmental Studies, Japan		 Average seasonal cycles of atmospheric potential oxygen (APO) in the Pacific region: Possible autumn ocean O2 emissions
Cindy Nevison
University of Colorado Boulder, USA		 Diverging trends in the APO seasonal cycle at northern high latitudes in the SIO Network: A tale of three sites
Eric Morgan
Scripps Institution of Oceanography, UCSD, USA		 Changes in the Seasonal Cycle of APO at Cold Bay, Alaska
Ralph Keeling
Scripps Institution of Oceanography, UCSD, USA		 Decadal variability and long-term trend in the northern APO deficit
Yunming Jin
Scripps Institution of Oceanography, UCSD, USA		 Seasonal Air-sea Atmospheric Potential Oxygen Flux Inferred from Global Airborne Observations
Shigeyuki Ishidoya National Institute of Advanced Industrial Science and Technology, Japan Interannual variations in δ(APO) and δ(Ar/N2) at the surface and gravitational separation in the stratosphere
Daisuke Goto
National Institute of Polar Research, Japan		 Short-term and long-term variations of the atmospheric CO2 and O2 observed at Ny-Ålesund, Svalbard
Friday 25th August 2023  
Karina Adcock
University of East Anglia, UK		 Continuous measurements of atmospheric oxygen in the United Kingdom
Kim Faassen
Wageningen University, The Netherlands		 Evaluation of the diurnal cycle of O2 and CO2 above the canopy of a forest and its application to further constrain the forest carbon balance
Alexander Knohl (presented by Andrew Manning)
University of Göttingen (University of East Anglia, UK)		 What can ecosystem-scale oxygen measurements tell us about the terrestrial carbon cycle?
Bharat Rastogi
University of Colorado Boulder, USA		 Exploring the sensitivities atmospheric δ13C of CO2 measurements to constrain biomes’ drought stress
Xiaoyue Liu
Lanzhou University		 ‘Urban Respiration’: Insights from O2 Measurements