LEAP @ AGU25 FALL MEETING

Find LEAP at AGU 2025 Fall Meeting!

Below is a guide to notable presentations and other events from LEAP colleagues at the Dec. 15-19, 2025, meeting of the American Geophysical Union, the world’s largest gathering of earth and space scientists. The meeting will take place in New Orleans, LA, and online across the globe. 

Presentations are listed in chronological order.
This list will be updated as additional information is gathered. 

Times listed below are U.S. Central (CST).
(Note: If you call up an abstract, the time displayed may default to your own local time if you attend remotely.)

8:30 – 12:00 || H11U-1140: Diagnosing Parametric Controls on CLM Ecohydrology Using Machine Learning Emulators

  • SARAH RYU (UC Berkeley, LEAP REU)
  • with LEAP colleagues: Linnia Hawkins, Katie Dagon, Sudhanshu Kumar (LEAP Momentum Fellow), Isabella Lu (LEAP REU)
  • Hall EFG (Poster Hall) (NOLA CC)


8:35 – 8:45 || A11B-01: From Regulation to Radiative Forcing: Constraining the Climate Response to Declining Shipping Aerosol Emissions (Invited)

  • DUNCAN WATSON-PARRIS (UC San Diego)
  • 342 (NOLA CC)


14:15 – 17:45 || GC13I-VR8841: The opportunity cost of 2023 Canadian wildfires

  • SHENGJIE LIU (USC, LEAP Momentum Fellow)
  • with LEAP colleagues: Brycen Lynch (LEAP REU), Kaleb Florence (LEAP REU), Ensheng Weng
  • Hall EFG (Poster Hall) (NOLA CC)

8:30 – 12:00 || A21B: Exploring Ice Microphysical Bulk Parameter Sensitivities with Perturbed Parameter Ensembles of Single Column Models

  • JOSEPH KO (Columbia University)
  • with LEAP colleagues: Marcus van Lier-Walqui, Kara Lamb
  • Hall EFG (Poster Hall) (NOLA CC)


8:30 – 12:00 || A21N-2192: Determining Thermodynamically Relevant Morphological Features of Cirrus Ice Crystals Using a Convolutional Neural Network

  • KATHERINE FRIELDS (UC Irvine; LEAP REU)
  • with LEAP colleagues: Giorgia Nicolaou (LEAP Momentum Fellow), Troy Stephens (LEAP REU), Joseph Ko, Kara Lamb
  • Hall EFG (Poster Hall) (NOLA CC)


8:30 – 12:00 || A21N-2188: Inferring Instantaneous Depositional Ice Growth Rates From Ice Crystal Images

  • TROY STEPHENS (Georgia Institute of Technology; LEAP REU)
  • with LEAP colleagues: Giorgia Nicolaou (LEAP Momentum Fellow), Katherine Frields (LEAP REU), Joseph Ko, Kara Lamb
  • Hall EFG (Poster Hall) (NOLA CC)


14:40 – 14:50 || A23A-03: Uncertainty Estimation and Explanation for Convective Initiation Nowcasting Using Bayesian Deep Learning

  • DA FAN (Columbia)
  • with LEAP colleague David John Gagne II
  • 275-277 (NOLA CC)


17:25 – 17:35|| A24F-08 Inferring Thermodynamic Histories from In Situ Ice Crystal Imagery via Conditional Diffusion Models

  • GIORGIA NICOLAOU (UC San Diego, LEAP Momentum Fellow)
  • with LEAP colleagues: Katherine Frields (LEAP REU), Troy Stephens (LEAP REU), Joseph Ko, Kara Lamb
  • 267-268 (NOLA CC)


17:25 – 17:35|| NG24A-08: JCM: A Differentiable Testbed for Hybrid Atmospheric Modeling

  • DUNCAN WATSON-PARRIS (UC San Diego)
  • 298-299 (NOLA CC)

8:30 – 12:00 || B31J-1847: Integrating Transformer-Based Land Surface Phenology into the Community Land Model for Climate-Responsive Vegetation Dynamics

  • AYA LAHLOU (Columbia)
  • with LEAP colleagues: Linnia Hawkins, Dave Lawrence, Pierre Gentine
  • Hall EFG (Poster Hall) (NOLA CC)


8:30 – 12:00 || B31K-VR8888: Investigating Snowpack-Shrub Interactions in the Arctic Tundra using Machine Learning and Process Models

  • ISABELLA LU (Columbia)
  • with LEAP colleagues: Linnia Hawkins, Katie Dagon, Sudhanshu Kumar (LEAP Momentum Fellow), Sarah Ryu (LEAP REU)
  • Hall EFG (Poster Hall) (NOLA CC)


8:30 – 12:00 || A31G-2152: Spatial Clustering of heat wave Regimes Through ConvAE Latent Space Analysis and Teleconnection Linkages

  • MOSTAFA REZAALI (Univ. of Florida)
  • with LEAP colleague: Shuolin Li
  • Hall EFG (Poster Hall) (NOLA CC)


8:30 – 12:00 || B31J-1844: DeepCarbon: A Global Data Product of Upscaled Carbon Fluxes from Knowledge-Guided Deep Learning Models

  • ALEKSEI ROZANOV (University of Minnesota)
  • with LEAP colleagues: Vipin Kumar, Arvind Renganathan
  • Hall EFG (Poster Hall) (NOLA CC)


9:35 – 9:45 || B31A-07 DifferBESS: Uncovering the Role of Canopy Temperature in Ecosystem Carbon and Water Fluxes Using a Hybrid Modeling Approach

  • JIANING FANG (Columbia)
  • with LEAP colleague: Pierre Gentine
  • 275-277 (NOLA CC)


14:15 – 17:45 || OS33E-1159: Detecting nonlinear causal relationships between El Niño and soil moisture in tropical forests

  • KALEB FLORENCE (Temple Univ., LEAP REU)
  • with LEAP colleagues: Shengjie Liu (LEAP Momentum Fellow), Brycen Lynch (LEAP REU), Juan Nathaniel, Ensheng Weng
  • Hall EFG (Poster Hall) (NOLA CC)


16:35 – 16:45 || B34A-03 Parsimony versus complexity (Invited)

  • PIERRE GENTINE (Columbia)
  • with LEAP colleague: Aya Lahlou
  • 265-266 (NOLA CC)


16:45 – 16:55 || GC34A-04: ClimateBench2.0: Probabilistic Climate Model Scoring

  • DUNCAN WATSON-PARRIS (UC San Diego)
  • with LEAP colleagues: Greg Elsaesser, Pierre Gentine, Dave Lawrence, Mike Pritchard, Laure Zanna
  • New Orleans Theater C (NOLA CC)

8:30 – 12:00 || H41U-1478: Scalable Water and Sanitation Monitoring Across Africa via AI‑Driven Satellite and Survey Data Integration

  • AYA LAHLOU (Columbia)
  • Hall EFG (Poster Hall) (NOLA CC)


11:04 – 11:14 || GC42A-04: Physically-Constrained Deep Generative Modeling

  • MATTHIEU BLANKE (NYU)
  • with LEAP colleagues: Yongquan Qu, Sara Shamekh, Pierre Gentine
  • New Orleans Theater C (NOLA CC)


13:00 – 14:00 || TH43C: Introduction to the Community Earth System Model Version 3 (CESM3) – A Town Hall

  • DAVE LAWRENCE (NSF NCAR)
  • 291 (NOLA CC)


14:15 – 17:45 || GC43G-0874: WaveSim: A Multi-Scale Wavelet-Based Similarity Metric for Climate Field Comparison

  • GABRIELE ACCARINO (Columbia)
  • with LEAP colleagues: Viviana Acquaviva, Sara Shamekh, Duncan Watson-Parris
  • Hall EFG (Poster Hall) (NOLA CC)


14:15 – 17:45 || GC43E-0832: Exploring Structural Differences and Parameter Calibration for Microphysics in CESM with Latent Representations using Contrastive Learning Models

  • DA FAN (Columbia)
  • with LEAP colleagues: David John Gagne II, Mike Pritchard, Brian Medeiros, Greg Elsaesser, Addisu Semie, Qingyuan Yang
  • Hall EFG (Poster Hall) (NOLA CC)


14:15 – 17:45 || GC43E-0840: Disentangled Contrastive Representation Learning for Interpretable Analysis of Warm Rain Microphysics Schemes

  • DA FAN (Columbia)
  • with LEAP colleagues: Subashree Venkatasubramanian (LEAP REU), David John Gagne II
  • Hall EFG (Poster Hall) (NOLA CC)


14:15 – 17:45 || A43R-2377: Understanding Ice Crystal Habit Diversity with Self-Supervised Learning

  • JOSEPH KO (Columbia)
  • with LEAP colleagues: Marcus van Lier-Walqui, Kara Lamb
  • Hall EFG (Poster Hall) (NOLA CC)


14:15 – 17:45 || GC43E-0845: Leveraging Machine Learning and MCMC to Optimize Community Land Model Parameters for Accurate Gross Primary Productivity Estimates

  • SUDHANSHU KUMAR (Auburn; LEAP Momentum Fellow)
  • with LEAP colleagues: Linnia Hawkins, Katie Dagon, Daniel Kennedy, Isabella Lu (LEAP REU), Sarah Ryu (LEAP REU)


14:15 – 17:45 || GC43E-0839: Deep Contrastive Learning for Microphysics Scheme Comparison in a Perturbed Initial Condition CESM Ensemble

  • AKILA SAMPATH (Univ. of Maryland Baltimore County; LEAP Momentum Fellow)
  • with LEAP colleagues: David John Gagne II, Da Fan
  • Hall EFG (Poster Hall) (NOLA CC)


14:15 – 17:45 || GC43E-0843: Improving Extreme Precipitation Representation with ML Based Warm Microphysics in CESM

  • ADDISU SEMIE (Columbia)
  • with LEAP colleagues: Brian Medeiros, Qingyuan Yang, Greg Elsaesser, Da Fan
  • Hall EFG (Poster Hall) (NOLA CC)


14:15 – 17:45 || GC43E-0848: Structural error-aware climate model calibration with global, local and zonal climatologies using Perturbed Parameter Ensembles (PPEs)

  • QINGYUAN YANG (Columbia)
  • with LEAP colleagues: Addisu Semie, Greg Elsaesser, Brian Medeiros, Da Fan
  • Hall EFG (Poster Hall) (NOLA CC)

8:30 – 12:00 || GC51G-0269: Forest Dynamics in South America Under a Changing Climate: An Analysis Using ModelE-BiomeE with ERA5

  • BRYCEN LYNCH (Virginia Polytechnic Institute and State Univ., LEAP REU)
  • with LEAP colleagues: Shengjie Liu (LEAP Momentum Fellow), Kaleb Florence (LEAP REU), Ensheng Weng
  • Hall EFG (Poster Hall) (NOLA CC)