ACT-America Community Workshop

Creating the next generation of GHG flux inversions

27 - 30 April

Online conference

Registration deadline March 30th

Submit Abstract

Want to submit an abstract? We will attempt to accommodate all requests for presentations. We will be focusing on collaborative discussion, so the time available for presentations will be limited. We kindly ask to focus your proposed presentations on topics that can foster research collaboration.

Abstracts are being accepted in the following topical areas:

  • Biological CO2
  • XCO2
  • Methane
  • Atmospheric Transport
  • Atmospheric Inversions
  • Other suggested topics 

About ACT-America Workshop

The NASA Earth Venture suborbital Atmospheric Carbon and Transport (ACT) - America project has been working for the past 5 years to create a basis in observations and models for advancing atmospheric greenhouse gas inversions to a new level of accuracy and precision by improving our understanding of atmospheric transport, prior flux models, and space-based XCO2 observations. In this, our final year of research activities, we are calling for a community workshop to bring together all parties interested in participating in these analyses.

Note: Due to the Coronavirus, the workshop will be held online. More details to come. 

Join Us to Focus on Advancing:

  • Atmospheric transport renalyses
  • Biological CO2 flux models
  • OCO-2 XCO2 uncertainty quantification
  • Quantification of U.S. methane emissions
  • Application of the findings from these topics to atmospheric inversions

Community workshop: Creating the next generation of GHG flux inversions


Can we use new atmospheric data and modeling systems to advance the accuracy and precision of regional atmospheric GHG flux diagnoses? Continental and sub-continental biogenic CO2 and CH4 flux estimates remain highly uncertain. Atmospheric transport, flux priors and models, and XCO2 / XCH4 data uncertainties limit confidence. Significant progress in all areas is needed to make atmospheric inverse flux estimates a rigorous and useful tool for understanding regional CO2 and CH4 sources and sinks.


Increased density atmospheric data (both satellite and in situ), higher-resolution atmospheric models and ensemble methods, new land-surface remote sensing methods, and extensive aircraft campaign data provides the opportunity to improve substantially the performance of GHG inverse flux estimates. The Atmospheric Carbon and Transport (ACT) - America mission and data set (airborne observations and models) are intended to catalyze these advances in atmospheric inversions.

Meeting objective

Bring together investigators including, but not limited to the ACT-America science team interested in improving regional to global atmospheric inversion methods using data including, but not limited to ACT-America observations and models. The workshop is intended as a chance to share progress, and work towards a body of publications, to be submitted in the summer and fall of 2020. The publications will form the basis for this next generation of inverse flux estimates. Working groups will be preparing in advance so that a minimum of introductory discussion is needed at the workshop.


Online Meeting Protocols
MS Teams Technical Connection Help

Planning Group

Kenneth Davis, Penn State (Project PI)
David Baker, Colorado State (Inversions)
Andrew Jacobson, NOAA (Inversions)
Andrew Schuh, Colorado State (Atm. Transport)
Christopher O'Dell, Colorado State (XCO2)
Zachary Barkley, Penn State (Methane)
Ian Baker, Colorado State (Biological CO2)
Sha Feng, Penn State (Biological CO2)
Bianca Baier, NOAA (Biological CO2)
Nicholas Parazoo, NASA (Biological CO2)

Additional Planning Members

Registered Participants

  • Kenneth Davis, Penn State
  • Tobias Gerken, Penn State
  • Colm Sweeney, NOAA, Boulder
  • Donglai Xie, Environmental Defense Fund
  • Tai-fang Fan, SSAI at NASA-Langley
  • Alecia Nickless, University of Bristol
  • Hanling Yang, Environmental Defense Fund
  • Benjamin Runkle University of Arkansas
  • Ian Baker, Colorado State University
  • Ben Poulter, NASA
  • Xinrong Ren, University of Maryland
  • John Miller, NOAA Global Monitoring Division
  • Ken Jucks, NASA HQ
  • Sojung Sime, Seoul National University
  • Eunsil Oh, Seoul National University
  • Hoonyoung Park, Seoul National University
  • Jeongmin Yun, Seoul National University
  • Tao Zheng, Central Michigan University
  • Andy Jacobson, CU Boulder and NOAA ESRL
  • Sandip Pal, Texas Tech University
  • Sha Feng, Penn State
  • Bianca Baier, NOAA
  • Bing Lin, NASA Langley Research Center
  • Gerbrand Koren, Wageningen University
  • Zach Barkley, Penn State
  • Nikolay Balashov, NASA Goddard
  • Xin Lan NOAA
  • Abigail Corbett, LaRC NASA
  • Nicholas Parazoo, Jet Propulsion Laboratory
  • Yoichi Shiga, NASA Ames/USRA
  • Sharon Gourdji, NIST
  • Brendan Byrne. Jet Propulsion Laboratory
  • Xiao-Ming Hu, Univ. Oklahoma
  • Samantha Walley,Texas Tech University
  • Min Huang, George Mason University
  • Mingyang Zhang, Johns Hopkins University
  • Hayoung Park, Seoul National University
  • Debjani Sihi, Oak Ridge National Laboratory
  • Micahael Obland, NASA Langley Research Center
  • Ben Crawford, University of Colorado Denver
  • Chaerin Park, Seoul National University
  • Kelsey Foster, Stanford University
  • Melissa Weitz, US EPA
  • Liesbeth Florentie,cWageningen University
  • Ming Xue, CNPC Research Institute of Safety and Environmental Technology
  • Saroja Polavarapu, Environment and Climate Change Canada
  • Max Eckl, DLR
  • Jinwoong Kim, Environment and Climate Change Canada
  • Nicholas Geyer, Colorado State University Fort Collins
  • Douglas Chan, Environment and Climate Change Canada
  • Yi Yin, Caltech
  • Yuyan Cui, Penn State
  • Maryann Sargent, Harvard University
  • Mahesh Kumar Sha, Royal Belgian Institute for Space Aeronomy (BIRA-IASB)
  • Andrew Schuh, Cooperative Institute for Research in the Atmosphere (Colorado State University)
  • Xueying Yu, University of Minnesota
  • Emily Bell, Colorado State University
  • Anna Karion, NIST
  • Alice Fan, SSAI
  • Aleya Kaushik, NOAA Boulder
  • Gretchen Keppel-Aleks, University of Michigan
  • Anthony Torres, University of Michigan - Climate and Space Sciences and Engineering Graduate and Undergraduate Student Organization
  • Nina Randazzo, Stanford, Carnegie Institution
  • Anke Roiger, Institute of Atmospheric Physics, DLR, Germany
  • Alina Fiehn, German Aerospace Center (DLR)
  • Abhishek Chatterjee,
  • Christopher Williams, Clark University
  • Ken Jucks, NASA HQ
  • Sean Crowell, University of Oklahoma
  • John Barrick, SSAI-LaRC
  • Chris O'Dell, Colorado State University
  • Alan Fried, University of Colorado
  • Brad Weir, NASA GMAO/USRA
  • Amin Nehrir, NASA Langley Research Center
  • Xiao-Ming Hu, University of Oklahoma
  • Sha Feng, Penn State
  • Joel Campbell, NASA Langley Research Center
  • Jeremy Dobler, Spectral Sensor Solutions
  • Josh DiGangi, NASA Langley Research Center
  • Joe Mcnorton, ECMWF
  • Susan Kooi, NASA LaRC/SSAI
  • Thomas Lauvaux, LSCE
  • Jocelyn Turnbull, GNS Science/ University of Colorado
  • Bianca Baier, NOAA/ESRL
  • Rory Barton-Grimley, NASA
  • Nina Randazzo, Stanford, Carnegie Institution
  • Anna Agusti-Panareda, European Center For Medium Range Weather Forecasts
  • Benjamin Runkle, University of Arkansas
  • Misa Ishizawa, Environment and Climate Change Canada
  • James Collins, NASA Langley Research Center
  • Dylan Millet, University of Minnesota
  • Julian Deventer, University of Minnesota
  • Xin Chen, University of Minnesota
  • Kelley Wells, University of Minnesota
  • Andres Gonzalez, University of Minnesota
  • Anna Michalak, Carnegie Institution for Science
  • Yonghoon Choi, NASA Langley/SSAI
  • Israel Lopez Coto, National institute of Standards and Technology (NIST)
  • Daniel Wesloh, Penn State
  • Yeonsoo Kim, Seoul National University
  • Andreas Fix, German Aerospace Center (DLR)
  • Gavin McNicol, Stanford University