Presentation Portal – NDACC Symposium 2025 – October 27-30, 2025 – Sheraton Virginia Beach Oceanfront Hotel, VA USA

This page enables registered attendees to view posters and send and answer questions about presentations. The first time you click on a presentation title, you will be required to login.

Those desiring to submit a paper to the NDACC Special issue, send an email using the Symposium contact form with subject ‘Scientific Program Committee’.

Symposium Keynotes

ID	Presenter	Title
K_S01	Susan Solomon	How A Few Ground-Based Measurements Coalesced Into Remarkable Networks: NDSC and NDACC
K_S02	Michael J. Kurylo	A Walk Down NDSC/NDACC Memory Lane
K_S03	Wolfgang Steinbrecht	NDACC, looking back and looking ahead

Session A: Creating and improving long-term data: Instrumentation, processing and providing past, present and future data-streams

ID	Presenter	Title
K_A01	Sophie Godin-Beekmann & Emmanuel Mahieu	Ups and downs in creating and maintaining decade-long high-quality ground-based observational data series
O_A01	Alistair Bell	Continuous Monitoring and Development in Microwave Radiometry for Middle Atmosphere Sounding
O_A02	Michel Van Roozendael	Reassessment of the long-term trend in stratospheric BrO columns at Harestua (60° N) and Lauder (45° S) based on three decades of observations
O_A03	Alberto Redondas Marrero	20 years of the Izaña Regional Calibration Center- Europe
O_A04	Luca Egli	Improvements of the spectra of the BTS Solar instrument for total column ozone retrieval and global UV radiation measurements
O_A05	Sergey Shilov	Advanced Solutions for Monitoring of Air Quality and Greenhouse Gases
O_A06	Kate Smith	The Balloon Baseline Stratospheric Aerosol Profiles (B2SAP) dataset for in situ measurements of stratospheric aerosol
O_A07	Michael Sicard	Updates of OPAR NDACC site at Reunion Island (21°S, 55°E)
O_A08	Andrea Pazmino	SAOZ network: more than 35 years of continuous O3 and NO2 total columns observations
O_A09	Louis Mirallié	Regional Bayesian composite of surface-based ozone partial columns
P_A01	Ankie Piters	Twenty-five years of Paramaribo upper air observations
P_A02	Joshua Richards	Data Homogenization and Improvements to the Beltsville, MD, USA, 20-year Ozonesonde Record
P_A03	Wolfgang Steinbrecht	Ozone profile time series from NDACC lidars, microwave radiometers, FTIRs, Umkehr, and sondes
P_A04	Eliane Maillard Barras	Processing of the Payerne ozonesonde timeseries with the time response correction (TRC) method: validation and post-2000 trend estimation.
P_A05	Sophie Godin-Beekmann	Correction of the Observatoire Haute Provence electrochemical concentration cell (ECC) ozonesonde data record
P_A06	Matt Tully	Comparison of Science Pump Corporation and EnSci Ozonesondes at Broadmeadows
P_A07	Voltaire A. Velazco	From Legacy to Future: Advancing Long-Term Total Ozone Column Observations at Hohenpeissenberg
P_A08	Christof Janssen	Towards new laser based UV absorption cross sections around 308 nm for traceable atmospheric remote sensing of ozone
P_A09	Yann Poltera	Observations of water vapor in the UT/LS of unprecedented accuracy with nonequilibrium corrected low-GWP frost point hygrometers
P_A10	Simone Brunamonti	ALBATROSS – a laser spectrometer for balloon-borne measurements of UTLS water vapor
P_A11	Pierre Fogal	PEARL: The Polar Environment Atmospheric Research Laboratory – A platform for ground-based measurements of the High Arctic Atmosphere and Environs
P_A12	Tomoo Nagahama	Long-term variation in isoprene column amount retrieved from the NDACC high-resolution FTIR dataset measured in Rikubetsu, Japan
P_A13	Hideaki Nakajima	First retrieval of HFC-125 by ground-based FTIR in Tsukuba, Japan
P_A14	Christof Janssen	A new NDACC-IRWG site at Paris: More than 10-year measurements of ethane and carbon monoxide over a European megacity.
P_A15	Gennadi Milinevsky	The simultaneous atmospheric ozone and carbon monoxide measurements by microwave 110/115 GHz radiometer in Changchun, northeast China
P_A16	Chaonan Lv	2D MAX-DOAS Observation Network in China
P_A17	Weiwei Hu	Spatiotemporal distribution and formation mechanisms of HONO based on long-term observations from the MAX-DOAS network in China
P_A18	Alexis Merlaud	Towards centralised stratospheric BrO profile retrieval within the FRM4DOAS system

Session B: Validating atmospheric measurements from satellites and from other platforms

ID	Presenter	Title
K_B01	Daan Hubert & Tijl Verhoelst	A journey towards 50 years of NDACC cooperation with the atmospheric composition satellites
O_B01	Jiansheng Zou	Validation of ACE-FTS v5.3 ozone data with NDAAC ground-based instruments
O_B02	Nigel Richards	Validation of OMPS Limb Profiler Ozone Retrievals Using Ground-Based Correlative Data
O_B03	Jun Wang	SAGE III/ISS: an Anchor Standard for Monitoring Atmospheric Composition in the Upper Troposphere and Stratosphere
O_B04	Juseon Bak	GEMS ozone profile retrieval: impact and validation of version 3.0 improvements
O_B05	Arno Keppens	A constellation approach to the validation of tropospheric ozone observations from space
O_B06	Niko Fedkin	Assessment of TEMPO NO2 columns for monitoring emissions from oil and gas operations using comparisons with Pandora and SCOAPE-II campaign data
O_B07	Zachary Fasnacht	Validating High Spatial Resolution Trace Gas Retrievals from the PACE Ocean Color Instrument
O_B08	Thierry Marbach	EUMETSAT’s approach to Cal/Val Gap Analyses and Fiducial Reference Measurements
P_B01	Tijl Verhoelst	NDACC ZSL-DOAS instruments: the backbone of satellite stratospheric NO2 data record validation
P_B02	Meike K. Rotermund	Validating MAX-DOAS Surface VMRs and Tropospheric Columns of NO2 and HCHO in Toronto, Canada
P_B03	Karin Kreher	CINDI-3 (3rd Cabauw Intercomparison of UV-Vis DOAS Instruments): Overview and Campaign Highlights
P_B04	Fernanda Cabello	Estimating the cloud thermodynamic phase over King George Island during austral summer with MicroPulseLidar measurements.
P_B05	Corinne Vigouroux	Validation of all S5P ozone products (total columns, profiles, and tropospheric columns) using the FTIR NDACC network
P_B06	Gaia Pinardi	Intercomparison of MAX-DOAS, FTIR and direct sun DOAS HCHO retrievals in Xianghe (China)
P_B07	Mary Cate McKee	SAGE III/ISS Validation methods
P_B08	Kaley A. Walker	More than Two Decades of the Canadian Arctic ACE/OSIRIS Validation Project at PEARL
P_B09	David E. Flittner	The “Comparisons” tab: a public avenue to view SAGE III/ISS data against NDACC observations.
P_B10	Daan Hubert	Ground-based observations : a treasure trove to assess stratospheric ozone observations by nadir and limb-viewing sensors
P_B11	Gordon J. Labow	Pandora Total Column Ozone Measurements Compared to Measurements from a Brewer Spectrophotometer.
P_B12	Jonguk Park	Variabilities of NO2 and HCHO from Pandora observations and the assessment of their surface concentrations using ground-based in-situ observations
P_B13	Jean-Christopher Lambert	A Decade of NDACC Support to the Sentinel-5P TROPOMI Operational Validation Facility
P_B14	Thomas F Hanisco	Validation and support of space-based measurements with the Pandonia Global Network of ground-based spectrometers

Session C: NDACC synergistic environment in support of field campaigns and other chemistry and climate- observing networks

ID	Presenter	Title
K_C01	Sergey Khaykin	Assessing the impact of Hunga eruption on the global stratospheric composition using a synergy of NDACC, GRUAN and satellite observations
O_C01	Roeland Van Malderen	Harmonization, Evaluation, and Trend Estimation of Ground-based Tropospheric Ozone Measurements from NDACC and IAGOS instruments.
O_C02	Stephen Montzka	Carbonyl sulfide from different angles; investigating how combining results from both NDACC and NOAA enhances our understanding of its atmospheric distributions, seasonalities, and trends
O_C03	Bianca Baier	Cross-network engagement opportunities between NDACC and NOAA’s AirCore Program
O_C04	Alexandre Baron	The NOAA Balloon Baseline Stratospheric Aerosol Profiles – In situ insight on the stratospheric aerosol layer
O_C05	Pawan Gupta	Three Decades of Atmospheric Aerosols Measurements from AERONET
O_C06	Anne M. Thompson	Tropospheric Ozone Trends in the Tropics (1998-2023): An Overview of Observational and Statistical Perspectives
O_C07	Steven Compernolle	Towards end-to-end validation of TROPOMI tropospheric data: A cross-network approach
O_C08	Ruud Dirksen	GRUAN: the road to long-term reference observations
P_C01	Nis Jepsen	Autonomous Retrieval of Atmospheric Sounding Systems Using the Meteoglider Platform
P_C02	Kimberly Strong	Synergistic Network Measurements of the Arctic Atmosphere at the Polar Environment Atmospheric Research Laboratory
P_C03	Joseph Hung	Filling the polar night gap in High Arctic FTIR trace gas measurements
P_C04	Bärbel Vogel	Does the Asian summer monsoon play a role in the stratospheric aerosol budget of the Arctic?
P_C05	Martine De Mazière	NDACC showcases global interoperability for trace gas and aerosol remote sensing in the CARGO-ACT project.
P_C06	Tuukka Petäjä	ACTRIS – High Quality Atmospheric data to All Users
P_C07	Thierry Leblanc	Centralized Data Processing as an added value to multi-network data integration: From standardized uncertainty budget to traceability and consistency, lessons learned from the development of the Global Lidar data Analysis Software Suite (GLASS)
P_C08	Debra E. Kollonige	Southern Hemisphere Additional Ozonesondes (SHADOZ) Network Updates: 2025 Activities and Ozone Trends Analysis
P_C09	Herman G.J. Smit	Quality Assurance of the Global Ozonesonde Network: A Continuous Process of Reporting and Assessing the Sondes Measurement Quality on their Consistency and Uncertainties
P_C10	Katherine R. Wolff	High Quality Ozonesonde Datasets for Ozone Trends Studies: Using NASA Wallops Flight Facility and SHADOZ Dual Soundings and Long-term Records for Demonstration
P_C11	Ryan Stauffer	Satellite, Ship, and Aircraft-based Views of US Gulf Coast Air Quality: The June and October 2024 SCOAPE-II Project
P_C12	Christian Rolf	Investigation of water vapour transport processes in the extratropical lowest stratosphere with the JUelich Modular Balloon Observatory (JUMBO)
P_C13	Maurice Roots	Synergistic Tropospheric Ozone Observations from Ground-Based, Airborne, and Balloon Platforms during the 2023 AGES+ Campaign
P_C14	Jason St. Clair	A new US network for ground-based remote sensing of carbon dioxide, methane, and CO

Session D: Synergistic use of models with NDACC and its Cooperating Networks’ data to interpret observations and support model development and verification

ID	Presenter	Title
K_D01	Martyn Chipperfield	Combining NDACC data and global 3-D modelling to understand processes, variability and trends in stratospheric composition
O_D01	Daniele Minganti	Understanding stratospheric circulation changes using FTIR measurements
O_D02	Ivan Ortega	Advancing NDACC/IRWG FTIR CH4 and N2O retrieval strategies to strengthen atmospheric composition analyses and the evaluation of model simulations and satellite observations
O_D03	Beatriz Herrera	NH3 trends and model comparisons at 21 FTIR sites
O_D04	Christian Rolf	Project overview about the ISSI International Team on upper tropospheric and stratospheric water vapor
O_D05	Daniel Rauter	Spectral UV Irradiance and Total Ozone Trends in the Austrian Alps and Lowlands: A Multi-Decadal Analysis
O_D06	Megan Lickley	Bias in the use of atmospheric lifetimes for 1-box emissions inference of ozone depleting substances measured at the surface
O_D07	Ralf Sussmann	On daytime increase of stratospheric NOx: New insights from FTIR measurements and photochemistry modeling
P_D01	Hyungyu Kang	Comparison of Daily Ozonesonde Measurements and Chemical Reanalyses over South Korea Based on 2021 Pre-ACCLIP Data: An Ozone Intrusion Case
P_D02	Teaghan Knox	Tropopause Trends Over Boulder, Colorado and the Potential Impact on Upper Tropospheric/Lower Stratospheric Ozone Trends
P_D03	Erin McGee	Using NDACC and TCCON to evaluate short-lived climate forcers in the Arctic
P_D04	Sieglinde Callewaert	WRF-GHG Simulations of methane (CHâ): comparing column-averaged and profile observations over East Asia

Session E: Linking changes in atmospheric composition, climate, and air quality

ID	Presenter	Title
K_E01	Susann Tegtmeier	Long-term changes of the Brewer-Dobson circulation and their impact on stratospheric composition
O_E01	Paul A. Newman	On the Breakup of the Antarctic Ozone Hole
O_E02	Simone Tilmes	The effects of solar climate interventions on the ozone layer, benefits, risks, and uncertainties
O_E03	Xin Zhou	Stratospheric Water Vapour Perturbation from the 2022 Hunga Tonga Eruption: Transport and Removal
O_E04	Hannah Clark	Long-term measurements of ozone and water vapour from IAGOS aircraft for air-quality and climate
O_E05	Sarah Strode	Evaluating Tropospheric Ozone Variability in GEOS-GMI with Ozonesonde Data and Quantifying its Drivers
O_E06	Peter Effertz	Updated Total Column Ozone trends from Ground-based and satellite records derived using an optimized LOTUS regression model.
O_E07	Victoria Flood	Utilizing over 20 years of measurements by the University of Toronto Atmospheric Observatory NDACC FTIR to assess air quality and composition
O_E08	James Hannigan	Revised Long Term Global Carbonyl Sulfide Trends from the NDACC IRWG
P_E01	Irina Petropavlovskikh	Tropospheric ozone trends at Boulder (2000-2022): Insights from multiple NDACC instruments
P_E02	Sachiko Okamoto	Ozone trends from ground -based measurements and merged satellite datasets at Observatoire Haute Provence (OHP)
P_E03	Caroline Jonas	Looking for ozone recovery in the Arctic
P_E04	Abby Scharf	Six decades of ozonesonde measurements over Antarctica
P_E05	Jian Guan	Human Influence on the Ozone Layer Detectable by the 1960s
P_E06	Ja-Ho Koo	Wintertime ozone vertical profile patterns in South Korea from multiple data obtained in the ASIA-AQ campaign
P_E07	Reem Hannun	Evaluating Ozone Deposition to Sensitive Ecosystems Using a Fast, High Precision Ozone Instrument
P_E08	Kevin Joshy	25+ Years of NDACC UV-Visible Measurements at 80°N
P_E09	Petra Duff	NDACC FTIR Measurements of Tropospheric Composition in the Canadian High Arctic
P_E10	Edgardo I. Sepulveda Araya	Characterizing aerosol impact on surface radiation over the Southern Andes, East of Santiago, Chile
P_E11	Akriti Masoom	The climatological variation of NO2, its underlying cause and effect on aerosol properties measurements

Session F: Oases in the desert: Measurements that address the impending gaps in atmospheric data

ID	Presenter	Title
K_F01	Ross J. Salawitch	The Need For Data from NDACC During the Upcoming Satellite-Based, Data Desert of Stratospheric Observations
O_F01	Nathaniel J. Livesey	Two decades of observations and science from the Aura Microwave Limb Sounder (MLS)
O_F02	Peter Bernath	Atmospheric Chemistry Experiment (ACE): Overview
O_F03	Martin Mlynczak	NASA SABER/TIMED measurements in the stratosphere
O_F04	Nigel Richards	Filling the Gap: OMPS LP Ozone Profiles as a Successor to Aura MLS Observations
O_F05	Katrin Müller	The Palau Atmospheric Observatory: A Decade of Monitoring in the Tropical Western Pacific
O_F06	Holger Vömel	20 years of tropical upper tropospheric and stratospheric water vapor monitoring at Costa Rica
O_F07	Lyatt Jaeglé	The STRIVE Earth System Explorer Mission Concept
O_F08	Ken Jucks	NDACC after MLS and ACE
P_F01	Pamela Wales	Continuing the Goddard Earth Observing System (GEOS) Composition Reanalysis Beyond Aura MLS
P_F02	Richard Querel	Past, present, and future of New Zealand’s Lauder atmospheric research station
P_F03	Thierry Leblanc	Validation of the Small Mobile Ozone Lidar with eXtended Capability (SMOL-X) measurements during the instrument’s first NDACC Deployment in Lauder, New Zealand
P_F04	Justus Notholt	FTIR and microwave trace gas observations by the University of Bremen
P_F05	Michael D. Himes	A machine learning approach to continue the stratospheric water vapor record using OMPS LP measurements
P_F06	Henry B. Selkirk	The Role of Frostpoint Measurements of Stratospheric Water Vapor in the Impending Stratospheric ‘Data Desert’
P_F07	Elizabeth Asher	Balloon measurements can help address impending UTLS water vapor data gaps
P_F08	Gerald Nedoluha	33 years of ground-based microwave measurements of H2O in the middle atmosphere
P_F09	Robin Wing	Using Resonance Fluorescence Lidars to Monitor Space Debris in the Upper Mesosphere and Lower Thermosphere, Case Study Falcon 9 Re-entry on 19 February 2025
P_F10	Jeannette D. Wild	The NDACC Database and Web Pages – 35 years of operations