GML highlights at the AGU 2025 Fall Meeting

2025-12-08

Federal and CIRES researchers in GML are presenting several talks and posters at the 2025 Fall Meeting of the American Geophysical Union and collaborating on many more. Highlights are below.

Tuesday, December 16

Retrieval of cloud optical depth constrained by radiation observations for overcast conditions from WFIP3
Presenter: Kelly Balmes (CIRES/GML)
08:30 – 12:00 CST, Hall EFG - Poster Hall (New Orleans Convention Center)

Verification of Anthropogenic Emissions and Their Role in the Earth System: Insights from Observations and Modeling I Oral
Oral Session Co-convener: Youmi Oh (CIRES/GML)
14:15 - 15:45 CST, 272-273 (New Orleans Convention Center)

Some Remaining Challenges for the Montreal Protocol and Recovery of the Stratospheric Ozone Layer
Presenter: Stephen Montzka
15:11 - 15:22 CST, 272-273 (New Orleans Convention Center)

Wednesday, December 17

Verification of Anthropogenic Emissions and Their Role in the Earth System: Insights from Observations and Modeling II Poster
Poster Session Co-convener: Youmi Oh (CIRES/GML)
08:30 – 12:00 CST, Hall EFG - Poster Hall (New Orleans Convention Center)

Reduced U.S. Methane Emissions During the COVID-19 Pandemic: Insights from Atmospheric Observations and Process-Based Inventories
Presenter: Sergio Ibarra Espinosa (CIRES/GML)
08:30 – 12:00 CST, Hall EFG - Poster Hall (New Orleans Convention Center)

Understanding the causes of the unprecedented growth of atmospheric CO₂ in 2024
Presenter (Invited Talk): John Miller
09:40 - 09:50 CST, 261-262 (New Orleans Convention Center)

Integrating Satellite and Isotopic Observations in CarbonTracker-CH₄ for Improved Methane Emission Estimates during 2019-2024
Presenter: Youmi Oh (CIRES/GML)
11:40 - 11:50 CST, 272-273 (New Orleans Convention Center)

A comparison of CO₂ measurements from the National Observations of Greenhouse gases from Aircraft Profiles (NOGAP) campaign with a global CO₂ model
Presenter: Jeff Peischl (CIRES/GML)
14:15 - 17:45 CST, Hall EFG - Poster Hall (New Orleans Convention Center)

Investigating the capability of atmospheric 𝞭D-CH₄ in reducing the uncertainty in the global methane budget and understanding spatio-temporal variability of surface fluxes from atmospheric 𝞭D-CH₄ simulation
Presenter: Santanu Halder (CIRES/GML)
14:15 - 17:45 CST, Hall EFG - Poster Hall (New Orleans Convention Center)

Next-Generation Modeling of Global Natural Methane Fluxes: Integrating Multi-scale Observations with Knowledge-Guided Machine Learning
Presenter: Youmi Oh (CIRES/GML)
16:55 - 17:05 CST, 265-266 (New Orleans Convention Center)

Thursday, December 18

Insights from balloon-borne measurements of stratospheric aerosol and water vapor following volcanic and pyrocumulonimbus injections (2019 – 2024)
Presenter (Invited Talk): Elizabeth Asher (CIRES/GML)
08:30 - 08:40 CST, 275-277 (New Orleans Convention Center)

Addressing UTLS water vapor data gaps with water vapor sondes and radiosondes
Presenter: Elizabeth Asher (CIRES/GML)
10:35 - 10:40 CST, New Orleans Theater A (New Orleans Convention Center)

Addressing UTLS water vapor data gaps with water vapor sondes and radiosondes
Presenter: Elizabeth Asher (CIRES/GML)
14:15 - 17:45 CST, Hall EFG - Poster Hall (New Orleans Convention Center)

Trace gas seasonal variability in the upper troposphere and lower stratosphere over Boulder, CO: Analysis from 12 years of NOAA AirCore profiles
Presenter: Bianca Baier
14:15 - 17:45 CST, Hall EFG - Poster Hall (New Orleans Convention Center)

Expansion of the NOAA AirCore program - StratoCore observations since early 2023 and ongoing to monitor and assess stratospheric composition and dynamic changes
Presenter: Markus Jesswein (CIRES/GML)
14:15 - 17:45 CST, Hall EFG - Poster Hall (New Orleans Convention Center)

Evaluating SO₂ Ozonesonde Filter Performance in the Presence and Absence of Volcanic Emissions Using Dual-Sonde Flights from San Jose, Costa Rica
Presenter: Samantha Cuson (Eckerd College/GML 2025 intern)
14:15 - 17:45 CST, Hall EFG - Poster Hall (New Orleans Convention Center)

Using commercial aircraft to monitor urban GHG emissions
Presenter: Colm Sweeney
17:25 - 17:35 CST, 245 (New Orleans Convention Center)

Friday, December 18

Ground-based validation of the operational satellite ozone products: an assessment of ozone recovery and processes impacting its short-term variability
Presenter: Irina Petropavlovskikh (CIRES/GML)
08:30 – 12:00 CST, Hall EFG - Poster Hall (New Orleans Convention Center)

Microbial driver of 2006 – 2023 CH₄ growth indicated by trends in atmospheric δD-CH₄ and δ¹³C-CH₄
Presenter: Ben Riddell Young (CIRES/GML)
08:30 – 12:00 CST, Hall EFG - Poster Hall (New Orleans Convention Center)

A Determination of the Minimum Ozonesonde Sampling Frequency Necessary for Computing Ozone Trends
Presenter: Gary Morris
08:30 – 12:00 CST, Hall EFG - Poster Hall (New Orleans Convention Center)

The Evidence for a Feedback between Tropical Wetland Emissions of Methane and Changing Climate
Presenter: Lori Bruhwiler
08:30 – 12:00 CST, Hall EFG - Poster Hall (New Orleans Convention Center)

Homogenization and Quality Control of the El Paso Ozonesonde Dataset (2017-2023): A Foundation for Assessing Regional and Transboundary Ozone Influences
Presenter: Kalista Fong (Johns Hopkins University/ GML 2025 intern)
08:30 – 12:00 CST, Hall EFG - Poster Hall (New Orleans Convention Center)

Using Trace Gas and ¹⁴C Measurements from the AEROMMA Campaign to Develop High-frequency Fossil Fuel and Biospheric CO₂ Data Over North American Cities in 2023
Presenter: Alissa Choi (University of Wisconsin Madison/ GML 2025 intern)
08:30 – 12:00 CST, Hall EFG - Poster Hall (New Orleans Convention Center)