GMAC 2026
DRAFT Agenda
Tuesday, 19 May
Session 1: Welcome and Keynote Session
(Gary Morris and Youmi Oh, Chairs)
- 8:30 - Vanda Grubisic, Director of the Global Monitoring Laboratory: Welcome from GML
- 8:45 - Jennifer Mahoney, Deputy Assistant Administrator for Science (NOAA - OAR): Overview from NOAA Oceanic & Atmospheric Research
- 9:15 - Jennifer Balch, Professor of Geography and Earth Lab Director (UC Boulder): Keynote Address
10:00 Break
Session 2: GMAC 2026 Cross-Theme Session
(Gary Morris, Chair)
- 10:30 - John Miller (NOAA - GML): Understanding the causes of the unprecedented growth of atmospheric CO2 in 2024
- 10:45 - Dan Jaffe (University of Washington): Smokeless Smoke? Investigating aerosol removal in smoke plumes.
- 11:00 - Youmi Oh (UC Boulder - CIRES; GML): Integrating Satellite and Isotopic Observations in CarbonTracker-CH4.
- 11:15 - Steve Montzka (NOAA - GML): Insights from long-lived gases: Tracking anomalous transport (Hunga Tonga context).
- 11:30 - Jeff Peischl (UC Boulder - CIRES; GML): NOGAP Aircraft Profiles vs. Global Models.
- 11:45 - Xin Lan (UC Boulder - CIRES; GML): Updates on global CO2, CH4, N2O and SF6 measurements from NOAA’s Global Greenhouse Gas Reference Network
12:00 LUNCH
12:15 Early Career Lunch & Panel Discussion
13:30 POSTER SESSION (See Poster Session Program)
15:30 Break
Session 3: The Carbon Pulse: Ocean Sinks & Terrestrial Feedbacks
(Aleya Kaushik - Chair)
- 16:00 - Britton Stephens (NCAR): Zonal-mean Southern Ocean air-sea CO2 exchange measured from operational military transport aircraft
- 16:15 - Eric Morgan (Scripps): Atmospheric O2 measurements show a strengthening ocean carbon sink and a stagnant terrestrial carbon sink since 1990
- 16:30 - Lei Hu (NOAA - GML): Evaluation of uncertainties in Lagrangian particle dispersion models using atmospheric radiocarbon measurements
- 16:45 - Madat Sardarli (Scripps): Advances in Interpreting Atmospheric CO2 Variability at Mauna Loa and Maunakea Observatories
- 17:00 - Haeyoung Lee (Earth Science NZ): A 20-year inter-laboratory comparison of atmospheric δ¹³C-CO₂ in the Southern Hemisphere
- 17:15 - Issy Borley (CSIRO - remote): Kennaook Cape Grim 50 Year Record and recent wildfire perturbations
17:30 Adjourn
17:45 Early Career Happy Hour (Optional)
Wednesday, 20 May
Session 4: Ozone, Particulate Matter, and Air Quality
(Elizabeth Asher, Chair)
- 8:30 - Anne Thompson (UMBC; NASA GSFC): Free Tropospheric Ozone Trends: 25 Years of Observations.
- 8:45 - Joshua Richards (UMBC): Influence of ENSO Teleconnection on Surface Ozone Exceedances (1980-2024)
- 9:00 - Peter Effertz (UC Boulder - CIRES; GML): An Ensemble Kalman Filter Approach to the Dobson Umkehr Ozone Retrievals
- 9:15 - James Sherman (Appalachian State University): Changing SE U.S. Air Quality and Aerosol Radiative Effects.
- 9:30 - Minsu Choi (UC Boulder - CIRES; GSL): WRF-Chem modeling of wildfire smoke impacts on surface radiation.
- 9:45 - Erin Boedicker (UC Boulder - CIRES; GML): Evaluating Long-term Seasonal Variability of Aerosol Optical Properties in Colorado
10:00 Break
Session 5: Methane & Trace Species: Sources, Sinks, and Isotopes
(Bianca Baier, Chair)
- 10:30 - Benjamin Gaubert (NCAR): Modelling OH radicals impacts on the CO and CH4 budget.
- 10:45 - Vasilii Petrenko (University of Rochester): 14CO and 14CH4 measurements to constrain OH variability.
- 11:00 - Michael Dyonisius (UC Boulder): Δ14CH4 supports high baseline fossil methane emissions.
- 11:15 - Ryan Stauffer (NASA GSFC): SCOAPE-II: A 2024 Multiplatform Measurement Campaign off the US Gulf Coast
- 11:30 - Pedro de Melo (UC Boulder - CIRES; GML): Machine learning-based analysis of oil and gas methane emissions in the Gulf of Mexico
- 11:45 - Detlev Helmig (Boulder A.I.R., LLC): Underestimation of Oil and Gas Industry Emissions in Inventories.
12:00 LUNCH
Session 6: Atmospheric Dynamics, Clouds, and Radiation
(Lori Bruhwiler, Chair)
- 13:30 - David Clemens-Sewall (UC Boulder): Potential Impacts of Marine Cloud Brightening in the Arctic.
- 13:45 - Tom Dror (UC Boulder - CIRES; CSL): Deforestation-Driven Clouds Amplify Top-of-Atmosphere Cooling in the Amazon
- 14:00 - Eshkol Eytan (UC Boulder - CIRES; CSL): On the Effect of Clouds on the Aerosol Radiative Effect Across Cloud Regimes
- 14:15 - Joseph Sedler (UC Boulder - CIRES; GML): Applying NOAA GML’s Radiation, Aerosol, and Clouds (G-RAD) Observations
- 14:30 - Jessica Lyons (Colorado State University): SF6 Network to characterize Atmospheric Transport Uncertainty.
- 14:45 - Eric Ray (UC Boulder - CIRES; CSL): The critical role of AirCore in stratospheric circulation monitoring.
15:00 Break
Session 7: Integrated Networks: Satellites, Aircraft, and Scale-Bridging
(Sara Morris, Chair)
- 15:30 - Arlyn Andrews (Silver Lining): A New Approach for Leveraging the Complementarity of Diverse Satellite and In Situ Observations
- 15:45 - Christopher O’Dell (CSU - CIRA): Scientific importance of the Orbiting Carbon Observatories (OCO)
- 16:00 - Kathryn McKain (NOAA - GML): Carbon Fluxes in East Tropical Africa from OCO-2 and Aircraft
- 16:15 - Temple Lee (NOAA - ARL): The Chestnut Ridge Supersite: Land-Atmosphere Interactions in Forests.
- 16:30 - Katie Smith (UC Boulder - CIRES; CSL): B2SAP dataset for in situ stratospheric aerosol profiles
- 16:45 - Colm Sweeney (NOAA - GML): Using Commercial Aircraft to Monitor Urban Carbon Reservoirs
Part 3: Poster Sessions
Christine Smith & Eric Hintsa, Chairs
13:30 - 15:30 Tuesday, 19 May
Session P1: The Carbon Pulse: Ocean Sinks & Terrestrial Feedbacks
- 1 Kerstin Braun (University of Colorado Boulder - INSTAAR): δ18O of atmospheric CO2 from the NOAA global monitoring network
- 2 Leslie Morales (Sao Paulo University): Characterizing CO2; emissions with Δ14C-CO2, CO2, and CO in urban, suburban, and background sites of São Paulo
- 3 Aleya Kaushik (University of Colorado Boulder - CIRES; GML): Advancing fire modeling capabilities for understanding terrestrial carbon exchange
- 4 Yanxiao Liu (University of Colorado Boulder): Preliminary Sensitivity Tests of X-STILT Parameters for Tropical Ecosystem Applications in the Amazon Region
- 5 Ximeng Huang (University of Colorado Boulder): What drove the response of ecosystem photosynthesis to 2023/24 Drought in the Amazon Tropical Forest
- 6 Ajay Devda (Colorado State University): Hydrodynamics-informed Carbon monitoring in Tropical Coastal Wetlands Using Harmonized Landsat-Sentinel (HLS) Product
- 7 David Munro (University of Colorado Boulder - CIRES; GML): On the Utility of Ship-Based Atmospheric CO2 Measurements for Constraining Air–Sea CO2 Fluxes
- 8 Ashley Pera (University of Colorado Boulder - CIRES; GML): Toward a Unified CarbonTracker: Consolidating NOAA GML's CO2 and CH4 Flux Estimates
- 9 Gabrielle Petron (University of Colorado Boulder - CIRES; GML): First look at the NOAA GML CO flask measurements on the X2025 calibration scale
Session P2: Ozone, Particulate Matter, and Air Quality
- 10 Lori Bruhwiler (NOAA - GML): NH Air Quality and Methane Emissions from Tropical Africa.
- 11 Dylan Gaeta (University of Colorado Boulder - CIRES; GML): A decline but no cessation of methyl bromide emissions from the United States over 2007-2018
- 12 Behrooz Roozitalab (National Center for Atmospheric Research): Airborne measurements of bromoform and dibromomethane and the potential impact of changing oceans on their future emissions
- 13 Eric Hintsa (University of Colorado Boulder - CIRES; GML): Halogen Compounds in the Northern Hemisphere Stratosphere: from Summer Midlatitudes to the Polar Vortex
- 14 Mark Kutchenreiter (University of Colorado Boulder - CIRES; GML): Global Monitoring Laboratory- Wildfire Research Mobile Monitoring Systems
- 15 Thomas Batalia (Appalachian State University): The influence of local meteorology and air mass source region on aerosol light scattering and absorption measurements at Appalachian State University
- 16 Gary Morris (NOAA - GML): Optimizing Ozone Profile Sampling Frequency for Trend Calculations
Session P3: Methane & Trace Species: Sources, Sinks, and Isotopes
- 17 Santanu Halder (University of Colorado Boulder - CIRES; GML): Investigating the capability of atmospheric δD-CH4 in reducing the uncertainty in the global methane budget
- 18 Ben Riddell-Young (University of Colorado Boulder - CIRES; GML): Trend in atmospheric d13C-CH4 suggests methane growth in 2024 and 2025 was driven by increased fire and fossil fuel emissions
- 19 John Ortega (CU Boulder - INSTAAR): Deuterium Measurements of Atmospheric Methane from the NOAA Global Flask Network and Inter-Laboratory Intercomparisons
- 20 Betsy Farris (University of Colorado Boulder): Towards Mitigation Scale: Supporting Methane Emissions Management by Connecting Spatial Scales with Satellites
- 21 Jianghanyang Li (University of Colorado Boulder - INSTAAR): Application of oxidation flow reactors to methane isotopes.
- 22 Ivan Ortega (National Center for Atmospheric Research): Global monitoring capabilities with NDACC HR-FTIR: from retrieval optimization to model evaluation and extreme events
- 23 Minde An (Massachusetts Institute of Technology): A top-down re-analysis of global and continental SF6 emissions using global measurements and an Eulerian model
Session P4: Atmospheric Dynamics, Clouds, and Radiation
- 24 Vanessa Caicedo (University of Colorado Boulder - CIRES; GML): A Machine Learning Derived Integrated Dataset of SURFRAD Radiation, Cloud, and Boundary Layer Height Observations
- 25 Jung-Sub Lim (University of Colorado Boulder - CIRES; CSL): Cloud-driven stochastic variability sustains radiative bimodality in the Arctic winter
- 26 Ben Sykes (Appalachian State University): Initial Characterization Of Cloud Condensation Nuclei Activity In The Southeastern United States
Session P5: Integrated Networks: Satellites, Aircraft, & Scale-Bridging
- 27 Eric Moglia (University of Colorado Boulder - CIRES; GML): NOAA GML’s Greenhouse Gas Reference Network Management, Logistics, and Importance
- 28 Joshua Mauss (University of Colorado Boulder - CIRES; GML): Quantifying the effects of long-term storage on measurements of carbon dioxide from air samples in flasks
- 29 Emily Kaiser (University of Colorado Boulder - CIRES; GML): Statistical Flagging of Longterm Records of Multiple Gases from Flask Samples
- 30 Janae Csavina (National Ecological Observatory Network): Sensor Life Cycle Management for Traceable Measurements in NEON
- 31 Sara Morris (NOAA - GML): Tall Tower Meteorological Measurements at the Colorado Atmospheric Observatory (CAO) in Eastern Colorado
- 32 Christine Smith (NOAA - GML): NOAA’s Mauna Loa Atmospheric Baseline Observatory – Site Status and Redevelopment Project Updates
- 33 Janelle Hakala (CU Boulder - CIRES; GML): Deploying and Testing a Next Generation In-Situ Measurement System at NOAA’s South Pole Atmospheric Baseline Observatory
- 34 Debra Kollonige (ADNET Systems, Inc.; NASA GSFC): Southern Hemisphere Additional Ozonesondes (SHADOZ) Network Updates
- 35 Peter Effertz (University of Colorado Boulder - CIRES; GML): Design and Implementation of a Relational SQL Database for Ozone and Water Vapor Measurements
- 36 Glen McConville (University of Colorado Boulder - CIRES; GML): Global Calibration Activities of the Dobson Network
- 37 Irina Petropavlovskikh (University of Colorado Boulder - CIRES; GML): Ground-based validation of the operational satellite ozone products
- 38 Elizabeth Asher (University of Colorado Boulder - CIRES; GML): Improving Sulfuric Acid Percent Weight A Priori Assumptions for Satellite Retrievals
