Urban Greenhouse Gas Conference and Stakeholder Summit 2025

The event is jointly hosted by the WMO Integrated Global Greenhouse Gas Information System (IG³IS) and ICOS Cities Project.

The conference agenda is available here.

Experts from around the world gathered to share cutting-edge research and case studies aimed at enhancing and expanding urban GHG monitoring. The conference facilitated the exchange of ideas among over 250 scientists and city representatives, all united by the common goal of shaping the future of urban climate action.

The first two days of the conference concentrated on technical aspects, featuring multiple sessions and presentations dedicated to specific components of the guidelines. There were also poster sessions available both in person and online. Each half-day session included discussions to explore the guidelines, address potential revisions, and identify gaps or challenges in current research. As the final discussion sessions approached, IG3IS reflected on the next steps for these guidelines and considered how to further develop them. The conference aimed to celebrate the hard work behind the guidelines and examine the related research.

The final day of the conference was designed to foster collaboration among a diverse range of stakeholders, encouraging the sharing of perspectives crucial for developing more robust GHG monitoring systems. Participants engaged in panel discussions about the importance of accurate climate data in improving decision-making processes. By bringing together various experts and practitioners, the aim was to jointly identify effective strategies and best practices that could enhance climate data management. This collaborative effort is intended to lead to informed actions that tackle urban climate change mitigation challenges.

The outcome of this event will be an updated draft of the Urban Good Practice Guidelines—a key document aimed at ensuring consistent, accessible, and accurate climate action on urban GHGs globally.

Conference Materials

Oral Presentations
Sl. No.	Title of Oral Presentation	Presenter	Affiliation
D1O1	CHETNA: City-wise High-resolution Carbon Emissions Tracking and Nationwide Analysis for 100 Indian Cities	Chuanlong Zhou	Laboratoire des Sciences du Climat et de l’Environnement (LSCE), Franc
D1O2	Fluorinated gases (F-gases) emission process models	Bo Yao	Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, Shanghai, China
D1O3	Guiding efforts in building city emission inventories: lessons learned from an intercomparison of bottom-up and downscaled inventories	Ingrid Super	TNO
D1O4	High-resolution estimation of fossil fuel CO2 in U.S. cities: advances, assessment, and emergent properties	Kevin Gurney	Northern Arizona University (NAU)
D1O5	Towards observation-based CO2 emission estimates for the city of Zürich – a lively journey	Lukas Emmenegger	Laboratory for Air Pollution and Environmental Technology
D1O6	Advanced monitoring of urban biogenic carbon sinks across urban green spaces	Leena Järvi	University of Helsinki
D1O7	Principles, applications and limitations of eddy covariance flux measurements in cities – IG3IS Urban Good Practice Guidelines	Andreas Christen	University of Freiburg, Germany
D1O8	Using greenhouse gas gradient and variance measurements to map urban emissions	Kenneth Davis	The Pennsylvania State University
D1O9	Sectoral attribution of measured CO2, NOx, and CO eddy-covariance fluxes in Zurich using a linear mixing model	Rainer Vincent Hilland	Department of Environmental Meteorology, University of Freiburg, Germany
D1O10	Monitoring Greenhouse Gas Emissions with Ground-Based Remote Sensing: What We Learn from MUCCnet	Jia Chen	Environmental Sensing and Modeling, Technical University of Munich
D2O1	Urban-AMMS: Urban Atmospheric Monitoring and Modeling System	Miguel Cahuich Lopez	Earth System Science Interdisciplinary Center, University of Maryland
D2O2	Introduction to the Los Angeles Megacities Carbon Project	Jooil Kim	Scripps Institution of Oceanography
D2O3	Building urban monitoring systems - from network design to emission quantification	Sanam Vardag	Heidelberg University
D2O4	Quantifying Greenhouse Gas Emissions Using Tracer Ratio Methods: Case Studies and Applications	Ute Karstens	ICOS ERIC - Carbon Portal, Department of Physical Geography and Ecosystem Sciences, Lund University
D2O5	Support Carbon Neutral Goal with a High-resolution Carbon Monitoring System in Beijing	Pengfei Han	Institute of Atmospheric Physics, Chinese Academy of Sciences
D2O6	Constraining Urban CO2 Emissions Using Combined Ground and Satellite Observations with Bayesian Inverse Modeling in Seoul	Sojung Sim	Seoul National University
D2O7	How does CO2 affect climate? A teaching module for grades 7 to 9	Astrid Hügli	ahsc
D2O8	From Science to Service: MeteoCarbone®—An Urban CO2 Monitoring Tool and Its Application to Several Paris Case Studies to Support Urban GHG Emission Management	David Duccini	Origins.earth, SUEZ Group, France
D2O9	Scenarios for reducing CO2 emissions from the Aix-Marseille metropolis area (France) from the interdisciplinary COoL-AMmetropolis project.	Irène Xueref-Remy	Aix Marseille University, Avignon Université, France
Stakeholder Summit
Sl. No.	Presentation Title	Presenter	Affilitaion
D3O1	Eating the emissions elephant – efforts of an Australian water utility to improve emissions reporting and reduce emissions	Nick Crosbie	Melbourne Water
D3O2	Atmospheric constraints on methane emissions from wastewater treatment plants in Melbourne, Australia	Cathy Trudinger	CSIRO Environment
D3O3	CarbonWatch-Urban: New Zealand case studies in measuring urban greenhouse gas emissions	Timothy Hilton	GNS Science Te Pū Ao
D3O4	Bridging the Gap: Stakeholder-Driven Implementation of Urban Greenhouse Gas Monitoring Systems	Sonia Wang	Senior Advisor, Data Foundation
D3o5	Urban Mapping of CO2 and Air Quality: BEACO2N	Ronald Cohen	UC Berkeley
Poster Day 01
Sl. No.	Poster Title	Presenter	Affilitaion
D1P1	Assessing the effect of carbon emissions from Motorbike taxis in the Urban transport system: A Case of Kampala City in Uganda.	Willy Mugwanya	Global Foundations for Rural and Urban Development Initiatives (GFRUDI)
D1P2	High-Resolution Accounting for the Urban Biogenic CO₂ Emissions: Insights from the Metropolitan Area of Barcelona	Qing Luo	Institute of Environmental Sciences and Technology, Universitat Autònoma de Barcelona(UAB), Barcelona, Spain
D1P3	NOx as Proxy for Estimating Fossil Fuel CO2 Emissions in Urban Environments	Hannes Juchem	Institute of Environmental Physics, Heidelberg University
D1P4	Verifying urban CO2 emissions by having two different prior information: a case study in Korea Carbon Project (KCP)	Munsu Park	Seoul National University
D1P5	Quantification of urban biogenic CO2 fluxes using a satellite-based model (VPRM) and field observations	Stavros Stagakis	Department of Environmental Sciences, University of Basel, Switzerland
D1P6	Investigating of carbon dioxide emissions in the urban atmosphere of Krakow, Southern Poland	Miroslaw Zimnoch	AGH University of Krakow
D1P7	Urban Carbon Reduction Policy Evaluation Using a Hybrid GHG Inventory of the Korea Carbon Project	Dong Yeong Chang	Seoul National University
D1P8	Scalable high-resolution bottom-up GHG emission inventories based on open data	Sebastian Block	Heidelberg Institute for Geoinformation Technology
D1P9	A Near-Real-Time High-Resolution Fossil Fuel CO2 Inventory for Metropolitan France and its Potential for Emission Scenario Planning	Hervé Utard	Origins.earth
D1P10	Energetic analyses of the power, transport and industrial sectors in Uganda to establish low carbon scenarios	Florence Kulabako	Grassroots Community Environmental Development Initiative (GCDI)
D1P11	Evaluation of Vegetation Photosynthesis and Respiration Model Parameterisations for Estimating Carbon Flux from Managed Turfgrass Lawns	Julia Marrs	National Institute of Standards and Technology
D1P12	High-resolution observational study of urban greenhouse gas emissions in India: Identifying key emission sources, variability, and transport pathways	Yogesh Tiwari	Indian Institute of Tropical Meteorology, Pune, Ministry of Earth Sciences, Govt of India
D1P13	Physical and Environmental Factors Limiting the Measurement of Anthropogenic CO2 Emissions from Space-based Platforms: Considerations for Future Monitoring Requirements	Dustin Roten	Jet Propulsion Laboratory, California Institute of Technology
D1P14	How much does urban greenery reduce our carbon emissions?	Erik Velasco	Molina Center for Energy and the Environment
D1P15	The Importance of Hyperlocal Meteorological Data in Understanding Air Pollution: Correlations with PM and Toxic Gas Behavior	Max Interbrick	Sparrow Analytics
D1P16	Leveraging public/private partnerships for data collection	Colm Sweeney	NOAA
D1P17	Monitoring urban CO2 emissions from space: current status and future potential	Abhishek Chatterjee	NASA Jet Propulsion Laboratory
D1P18	Approaches to Evaluate Urban Emissions-	Gloria Banda	Ministry of Agriculture
D1P19	Spatial and temporal examination of Air Quality in Western Uganda	Brendah Nassiwa	Appropriate Rural Community Agricultural Development Agency (ARCADA),
D1P20	Identifying Urban Carbon Emission Peaks and Synergizing Reductions of Carbon Emissions and Air Pollutants through Tree-ring 14C	Zhenchuan Niu	Institute of Earth Environment, Chinese Academy of Sciences
D1P21	Tall tower GHG observations from industries and residential areas NW of Copenhagen, Denmark	Andreas Ibrom	DTU-Sustain , Technical University of Denmark (DTU) , Kgs. Lyngby, Denmark
D1P22	Bridging Territorial and Consumption-Based Emissions for Urban Climate Action Assessments	Ying Yu	University of North Carolina at Chapel Hill
D1P23	New ISO Standard for Greenhouse Gas Measurements	Hratch Semerjian	University of Maryland
D1P24	All-in-one analyzer for urban GHG and trace gas monitoring	Morten Hundt	MIRO Analytical AG
D1P25	Methane emission monitoring at wastewater treatment plants in Europe and Australia	Pieter de Jong Nick Crosbie	Melbourne Water
D1P26	Characterizing large nitrous oxide N2O emissions from urban areas	Roisin Commane	Columbia University, New York, USA
D1P27	Seasonal Variations in Methane Mole Fraction and Stable Isotope Ratios in Debrecen, Hungary	Tamás Varga	HUN-REN Institute for Nuclear Research
D1P28	Using mobile surveys to track methane emissions in Canadian cities	Felix Vogel	Environment and Climate Change Canada
D1P29	14C-Based Separation of Fossil and Non-Fossil CO2 Fluxes in Cities Using Relaxed Eddy Accumulation: Results from Tall-Tower Measurements in Zurich, Paris and Munich	Ann-Kristin Kunz	University of Freiburg, Freiburg, Germany
D1P30	Introducing the Korea Carbon Project Flux Network: Quantifying CO₂ Emissions and Absorption Dynamics from Urban-Industrial Sources	Geunjae Choi	Seoul National University
D1P31	Inter-city comparison of methane emissions measured using tall-tower eddy covariance and inventory analysis	Mary Kang	McGill University
D1P32	Atmospheric O2/N2 measurements as a proxy for fossil fuel CO2 in the city of Heidelberg, Germany	Penelope Pickers	University of East Anglia
D1P33	A Decade of Urban Methane Monitoring in Indianapolis, USA: Insights from a Continuous Tower Network and the Evolution Towards Near-Realtime Monitoring	Zachary Barkle	Penn State University
D1P34	Source-Specific Quantification of Carbon Dioxide Fluxes in Urban Settings	Samantha Murphy	Penn State Department of Meteorology and Atmospheric Science
D1P35	An assessment of CO2 emissions measured by a tall-tower eddy-covariance system in the city of Zurich	Armin Sigmund	University of Basel
D1P36	Increasing accessibility to standards and comparisons for atmospheric CO2 amount fraction measurements	Emmal Safi	National Physical Laboratory
D1P37	Leveraging GHGSat’s Methane Monitoring Data to Address the Urban Ozone Challenge	Carles Debart	GHGSat
D1P38	Long open-path greenhouse gas observations in urban areas	Kevin Cossel	NIST
Poster Day 02
Sl. No.	Poster Title	Presenter	Affilitaion
D2P1	Modelling and Forecasting Greenhouse Gas Emissions in Bangladesh: A Seasonal-Adjusted AI-based Hybrid Time‑Series Approach	Rumana Rois	Department of Statistics and Data Science, Jahangirnagar University
D2P2	Methane (CH4) point sources fine-scale modeling in the Aix-Marseille-Provence metropolis area, France	Khalid Mehmood	Aix Marseille Univ, Avignon Université, CNRS, IRD, IMBE (Institut Méditerranéen de Biodiversité et d’Ecologie marine et continentale), Aix, Marseille, France
D2P3	Predicting Methane Emissions from Agricultural Sources Using Machine Learning: A Data Gap-Filling Approach	Ahmed Abdelnaby	Egyptian Meterological Authority
D2P4	A Deep Learning Approach to Inferring CO2 Emissions de-novo from Measurements of a Real-Time Sensor Network	Ronald Cohen	UC Berkeley
D2P5	Greenhouse Gas in Bangladesh and a Case Study Demonstration on the capital City of Dhaka in Bangladesh regards to greenhouse gas (CO2).	Anowar Hossen	Bangladesh Meteorological Department
D2P6	Nature Education in Urban Environment.	Abdul Aziz Kromah	Department of Urban Affairs, Ministry of Internal Affairs
D2P7	An Overview of Climate Change and Air Pollution: Special Case of Kathmandu	Narayan Prasad Gautam	Tribhuvan University
D2P8	Urban-scale inversions of methane emissions using ground-based measurements: A case study of Melbourne, Australia	Nasimeh Shahrokhi Cathy Trudinger	CSIRO
D2P9	Development and operation of the INVERSE KOREA system to support WMO IG3IS	Daegeun Shin	NIMS (National Institute of Meteorological Sciences) / The Korea Meteorological Administration (KMA)
D2P10	The Megacities Carbon Project	Charles Miller	NASA Jet Propulsion Laboratory, California Institute of Technology
D2P11	Evaluating the CO2 emission inventory of the city of Zurich using Eddy-covariance measurements at a single tall tower site	Dominik Brunner	Empa, Swiss Federal Laboratories for Materials Science and Technology
D2P12	Methane sources in cities re-interpretated using new laboratory results	Roisin Commane	Columbia University, New York, USA
D2P13	Identifying the effect of moisture on NDIR-based CO₂ sensor in urban monitoring site of the Korea Carbon Project (KCP)	Jaewon Shin	Seoul National University
D2P14	Towards unraveling urban scale emissions of greenhouse gases in Korea: Regional inversion framework and urban carbon cycle observations	Doyoon Kwon	Yonsei University, South Korea
D2P15	Top-down estimates of CO2 and CH4 emissions in Korea based on an inverse modeling framework	Bonhoon Koo	Yonsei University
D2P16	Biogenic Carbon Sequestration in Cities: Applying Scalable, Cost-Effective and Science-Based Models to Support Services and End-Users	Liisa Kulmala	Finnish Meteorological Institute
D2P17	High-resolution modelling at urban scales	Maarten Krol	Wageningen University, the Netherlands
D2P18	Bayesian framework for evaluation of methane emissions in US cities	Kimberly L. Mueller	NIST
D2P19	Understanding Methane Emissions in US cities	Anna Karion	NIST
D2P20	Urban CO2 and CH4 atmospheric measurements in two cities of the Northern Italy: Milan and Bologna	Paolo Cristofanelli	CNR
D2P21	Impacts of the 2024 Olympic Games on Urban CO2 Emissions in Paris	Angélica Centanaro	Origins.earth
D2P22	Methane Emissions from Landfills of Municipal Solid Waste in Lima, Peru: Case Study of El Zapallal Landfill	Ewonny Ttito Moya	Hallym University / Glasgow Caledonian University
D2P23	Regional and Socioeconomic Characteristics in Global C40 Cities’ CO2 Emissions Revealed from Space	Doyeon Ahn	Morgan State University / NASA Goddard Flight Space Center
D2P24	Sources and factors controlling ozone background over Egypt	Hesham Hassan	Egyptian Meteorological Authority
D2P25	Advancing the Development of Local Climate Plans in Sub-Saharan Africa: Participatory and Gender-Sensitive Approaches to Reducing Greenhouse Gas Emissions - A Case Study of the BRIDGE Project and ICLEI Africa's Initiatives in Cameroon	Blondel Silenou Demanou	ICLEI AFRICA
D2P26	Strategies to mitigate municipal waste and greenhouse gas emissions in kiira municipality in Wakiso District.	Lydia Kikomeko Nakatte	Organization for Sustainable Development and Environmental Conservation (OSDEC)
D2P27	RESPIRE CLIMATE: Spain National Greenhouse Gas Emission Monitoring System	Karinna Matozinhos	Barcelona Supercomputing Center
D2P28	Pervasive gas sensing using optical fibers	Gara Villalba	Universitat Autònoma de Barcelona (UAB)
D2P29	Identification and quantification of fugitive methane emissions from urban infrastructure in South Korea	Jaewon Joo	Seoul National University
D2P30	Trends and Projections of Greenhouse Gas Emissions in Bangladesh: A Time-Series Analysis and Policy Implications	Mohammad Mahboob Hussain Khan	Bangladesh Meteorological Department (BMD)
D2P31	Toward a global urban GHG monitoring network	Giacomo Nicolini	CMCC - Euro-Mediterranean Center on Climate Change, Italy
D2P32	A conceptual prototype of a dashboard for visualising and assessing gridded GHG impacts in municipal settings	Tatu Marttila	Aalto University
D2P33	The ICOS Cities data portal	Alex Vermeulen	ICOS ERIC - Carbon Portal
D2P34	Introduction to urban CO2 monitoring network of the Korea Cabon Project (KCP)	Yeongin Kim	Seoul National University, Korea
D2P35	Analysis of urban CO2 and heat fluxes and evaluation of the SUEWS model using eddy covariance observations from two towers in Heraklion, Greece	Konstantinos Politakos	The Remote Sensing Lab of FORTH – Rslab, Greece
D2P36	Mapping CO2 emissions at the scale of blocks, buildings, and roads	Erik Velasco	Molina Center for Energy and the Environment

Conference programme committee

Jocelyn Turnbull
Felix Vogel
Tim Hilton
Kimberly Mueller
Claudio D'onofrio
Emmanuel Salmon
Liisa Ikonen
Charlotta Henry
Tabare Curras
Oksana Tarasova
Jarin Tasneem Oyshi

This workshop is supported by NASA under award No. 80NSSC23K1349.