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Seminars By Semester

Spring 2026

 Host Spring 2026: C. Larry Winterwinter@arizona.edu
1/14No Invited Speaker - students onlyOrganizational meeting for the semester
1/19HolidayMartin Luther King, Jr. (U.S. observed) - no classes and department offices closed
1/21Marcel Schaap, U of A Environmental ScienceGlobal maps of soil hydraulic parameters at 30 meter resolution: challenges and solutions
1/28Steven P. Loheide, II, University of Wisconsin-Madison2026 Darcy Lecture: Groundwater recharge regimes are in flux
2/4Parade of Stars Session 1: Introduction to HAS Faculty Teaching and ResearchTalks by Bo Guo, Kim Wood, Yang Song, and Bryn Stewart
2/11Parade of Stars Session 2: Introduction to HAS Faculty Teaching and ResearchTalks by Xubin Zeng, Jim Yeh, Laura Condon, and Vic Baker
2/18Laura Meredith, U of A, Director, Biosphere 2 Tropical Rain Forest, Associate Professor, SNRE (home), and Joint Associate Professor, Hydrology & Atmospheric SciencesThe breathing biosphere--microbial and ecosystem VOCs and trace gases in a changing atmosphere
2/25Armin Sorooshian, U of A, Professor, Chemical & Environmental Engineering and Joint Professor, Hydrology & Atmospheric SciencesReflecting on Two Decades of Flying In and Out of Clouds
3/4No speaker Wed: Two special speakers this week, Thu Mar 5 & Fri Mar 6!No speaker on Wednesday this week--see Thursday & Friday!
3/5Michael Fienen, USGS Upper Midwest Science Center, and Aaron Pruitt, Wisconsin Department of Natural ResourcesTHURSDAY!  Who cares about drawdown? Translating hydrologic modeling into meaning in the Wisconsin Central Sands
3/6Michael Sukop, Florida International UniversityFRIDAY!  2026 Birdsall-Dreiss Lecture: The Enigmatic Biscayne Aquifer: Field, Laboratory, and Computational Approaches
3/7-15RecessSpring Break - no classes for students - all departmental offices remain open
3/18Joel Fabregat-Palau, Eberhard Karls Universitat TubingenTitle to be announced
3/24Annual Student Research SymposiumEl Dia del Agua y la Atmosfera - See website link for details
4/1Grover Swartzlander, Rochester Institute of Technology(Earth Cup L1 Project) Title to be announced
4/8  
4/15  
4/22Jennifer McIntosh, U of A Hydrology & Atmospheric SciencesTitle to be announced
4/29  
5/5Last day of classes 

Fall 2025

 Host Fall 2025: C. Larry Winterwinter@arizona.edu
9/24Thomas C. Adang, PhD, Colonel, USAF (Retired) (HAS Alumnus)Wildcat for Life--Paying It Forward
10/8Suqin Duan, UCLACoherent patterns of land hydroclimate change, heatwaveheatwaves, and precipitation extremes
10/15Hsin I Chang, HAS Department

Historic and future extreme climate assessments over the contiguous U.S. and Mexico and applications for risk management

10/20Rainer Helmig, Stutgartt UniversitySPECIAL DAY (MONDAY) - 2025 Kimberly-Clark Distinguished Lecturer, Professor Rainer Helmig, Stutgartt University, sponsored by the International Society for Porous Media (InterPore): Porous media and free-flow coupling - From REV to pore scale and back
10/29Anne Ojeda, Auburn UniversityRural water security: Private well systems, community engagement, and public health
11/5Anping Chen, Colorado State UniversityEcosystem responses to drought: Are there unified patterns?
11/12Michael Brunke, HAS DepartmentHow well do Earth system models simulate cloudy boundary layers?
11/19Lourdes Fierro, HAS DepartmentHydrometeorological extremes and open science: A computational framework for resilience
12/3Alan Robock, RutgersAGU College of Fellows Distinguished Lecture Series: Global famine after nuclear war

Spring 2025

 Host Spring 2025: Andrew Bennettandrbenn@arizona.edu
1/29Jim Yeh, UA HAS ProfessorStochastic information fusion: the future hydrogeologic sciences
2/5Grant Ferguson, 2025 Darcy LecturerLiving fossils: Ancient groundwaters in the Anthropocene
2/12Kevin Anchukaitis, UA SGDE+LTRRReconstructing Pacific atmospheric circulation using paleoclimate data assimilation
2/19Fuhar Dixit, University of California BerkeleyExploring novel methods of solving the world's remediation problems
2/26Bryn Stewart, California Institute of Technology (Caltech)Streams as Mirrors: Using Critical Zone science to understand hydro-biogeochemical processes and stream water quality
3/5Caitlyn Hall, University of Arizona Advancing climate resilience through community driven water and disaster science
3/7Chaopeng Shen, Pennsylvania State UniversityState-of-the-Art AI & Physics-Informed ML in Hydrology and beyond: Insights and Synergies
3/19Spring Break* 
3/25El Dia del Agua y la Atmosfera, Annual Student Research Symposium2025 Theme: Research to Resilience
3/26Akif Sarikaya, Istanbul Technical University (HAS Alumnus)Hydroclimatological controls on long-term carbonate denudation in Mediterranean mountains
4/2Andrew Bennett, HAS Assistant Professor, Facilitating Discussion2025 El Dia World Cafe Recap: The Conversation Continues
4/9Walker Lee, NCARClimate intervention: the risks, benefits, uncertainties, and ethics of cooling the planet with aerosols
4/16C.L. Winter, HAS ProfessorProjecting hidden state dynamics of annual streamflow in the Colorado river basin forward
4/30Aniket Gupta, HAS Postdoctoral Researcher Understanding the role and representation of Critical-Zone processes in hydrological and land-surface models
5/7Andrew Bennett, HAS Assistant Professor, ModeratorEnd of semester reflection and discussion of future colloquium activities
*University of Arizona 2025 Spring Break March 8 through March 16

Fall 2024

9/18Laura Condon, UA HAS Associate ProfessorExploring the role of groundwater in the terrestrial water cycle
10/2Jonathan Frame, University of AlabamaBeyond catchment boundaries: extending geospatial context for large-domain hydrological prediction
10/9Ellis Robinson, UA Chemical and Environmental Engineering Mapping air pollutants and high spatial resolution: community exposure assessment using mobile monitoring and fast, in situ instrumentation
10/16Jonathan Sullivan, UA Geography, Development, and EnvironmentUsing satellite-observed inundation to investigate health disparities in the aftermath of floods
10/23Hoshin Gupta, UA HAS Regents ProfessorOn machine learning "interpretable" and "generalizable" representations of dynamical geoscientific systems
10/30Kau Thirumalai, UA GeosciencesFuture increase in extreme El Niňo supported by past glacial changes
11/6Kathy Jacobs and Neha Gupta, UA Arizona Institute for Resilience (NG, HAS Alumnus)Arizona tri-university recharge and water supply reliability project: An update
11/13Yuan-Heng Wang, Lawrence Berkeley National Laboratory (HAS Alumnus)ML-enabled physically-interpretable modeling of catchment-scale precipitation-runoff dynamics using the mass-conserving-perceptron
11/20Clark Evans, NOAA GSCReal-time, high-resolution hurricane prediction with the model for prediction across scales
12/4Casey Davenport, University of North Carolina-CharlotteThe evolution of supercell thunderstorms and student understanding as a response to their environment

Spring 2024

1/17Yifan Cheng, National Center for Atmospheric ResearchTowards more actionable hydrologic modeling in Alaska and Yukon River Basin
1/24Joao Teixeira, Jet Propulsion LaboratoryTurbulence, clouds and climate Models
1/31Matt Becker, 2024 Darcy LecturerFiber optic distributed sensing as a window on subsurface flow
2/7Marek Zreda, UA Professor, Hydrology and Atmospheric SciencesMeasuring stream discharge using audible sound
2/14Tyler Robinson, UA Associate Professor, Lunar and Planetary LaboratoryConnecting Earth to exo-Earths: Promises and challenges for Earth-like exoplanets
2/21Clara Deser, Senior Scientist, National Center for Atmospheric ResearchProjected changes in atmospheric circulation and precipitation variability over the North Pacific and North America in a coupled model large ensemble
2/28Peter Carter, MD, Director, Climate Emergency InstituteCan we better communicate (and mitigate) the climate emergency?
3/13Addisu Semie, Ph.D., Addis Ababa UniversityInfluence of the organization of deep convection on the radiation budget and precipitation extremes in the tropics
3/20Riley Nolan and Jesse Jankowski, State of California Water ResourcesCalifornia Water Rights Overview and 2021-2023 drought response in the Sacramento-San Joaquin Valley delta watershed
4/3Xiaonan Tai, Assistant Professor, New Jersey Institute of TechnologyInfluence of groundwater on forest mortality, resilience, and management
4/10Zhen Li, Postdoctoral Researcher, Lawrence Livermore National LaboratoryA framework for integrating genomics, microbial traits, and ecosystem biogeochemistry
4/17Erica DiFilippo, S.S. Papadopulos &  Associates, Inc. (HAS Alumnus)Polymer based PFAS as long-term source to surface water in the Alabama River System
4/24Mary Barth, Senior Scientist Section Head, National Center for Atmospheric ResearchVertical transport of aerosols and trace gases in deep convection
5/1Bo Guo, UA Assistant Professor, Hydrology and Atmospheric SciencesFate and transport of PFAS in soils: controlling processes, mathematical formulation, and practical modeling approaches