Keynote Speakers

Headshot of Douglas Kinnison

Session 1: Doug Kinnison (National Center for Atmospheric Research, USA)

“Polar ozone recovery: Challenges and Uncertainties in Model Projections”


Douglas Kinnison is a Project Scientist IV at the National Center for Atmospheric Research in Boulder Colorado. He obtained his B.S. degree in chemistry from Colorado State University and his Ph.D. degree (1989) in Chemistry at the University of California, Berkeley working with Professor Harold Johnston and Dr. Donald Wuebbles. He is currently responsible for the development, implementation, and evaluation of the chemistry component of the Whole Atmosphere Community Climate Model (WACCM). He has been a coauthor of the 1998, 2006, 2010, and 2022 World Meteorological Organization / United Nations Environmental Program Scientific Assessment of Ozone Depletion and a member of the WMO 2018 Steering Committee. He was a lead author of the SPARC 2010 Report on the Evaluation of Chemistry-Climate Models. His specialties include atmospheric chemistry and modeling of the global atmosphere. This includes the role that chemistry plays in understanding the impact of halogens, volcanic eruptions, and solar forcing on both tropospheric and stratospheric ozone abundance and trends.

Headshot of Helen Worden

Session 2: Helen Worden (National Center for Atmospheric Research, USA)

"The Tropospheric Ozone Assessment Report (TOAR), Phase II"


Dr. Helen Worden is the NCAR/ACOM Deputy Lab Director and the U.S. Principal Investigator for Terra/MOPITT. She is interested in multi-decadal trends of carbon monoxide that indicate changing emissions of pollution with global and regional implications. She is also co-chair of the IGAC Tropospheric Ozone Assessment Report (TOAR), Phase-II, that will produce an updated assessment of tropospheric ozone’s global distribution and trends, along with distributions and trends of ozone precursor emissions, and aims to quantify the impacts of tropospheric ozone on climate, human health and vegetation. She earned her B.A. in Physics from the University of Colorado, Boulder and her PhD in Elementary Particle Physics from Cornell University. She worked several years at JPL/CalTech in Pasadena, CA before moving to Boulder, Colorado to work at NCAR.

Headshot of Marta Abalos

Session 3: Marta Abalos ( Universidad Complutense de Madrid, Spain )

"Recent past and future trends in stratospheric ozone and circulation"


Marta Abalos is Associate Professor in the Department of Earth Physics and Astrophysics of Universidad Complutense de Madrid (Spain). She received her Ph.D. in Physics in 2014. She worked a postdoctoral researcher at the Laboratoire de Météorologie Dynamique, École Normale Supérieure de Paris (France), and at the National Center for Atmospheric Research, Boulder, CO (USA). She is a coauthor of the 2018 and 2022 WMO/UNEP Ozone Assessment reports. Her research focuses on large-scale dynamics and tracer transport in the upper troposphere and lower stratosphere, with an emphasis on trends forced by anthropogenic emissions of greenhouse gases and ozone-depleting substances.

Headshot of Alkis Bais

Session 4: Alkis Bais (The Aristotle University of Thessaloniki, Greece)

Interactive changes of ozone, UV radiation, and climate in the 21st century and implications for the environment


Alkis Bais is a Professor at the Aristotle University of Thessaloniki (AUTh) and Head of the Laboratory of Atmospheric Physics (2002-2023). He received his Ph.D. degree in 1984 from the Physics Department of AUTh. He has been PI and member of several national and international research projects mainly related to solar UV radiation and ground-based remote sensing of atmospheric composition. He is member of the Environmental Effects Assessment Panel of UNEP since 2000 and chapter lead of the 2015 and 2019 assessment reports. He was lead author (2007) and co-author (2003) in the WMO/UNEP scientific assessments of ozone depletion. He has served as chairman of the Scientific Advisory Group for Ozone (SAG-O3) of WMO, member of the SAG-O3 and UV since 2029 and member of the Instrumentation Working Group of the WMO AD HOC Scientific Steering Committee on UV Monitoring (1994-2011). He has been a member of the International Ozone Commission (2008-2016) and the International Radiation Commission (2013-2020). His research has been focused on the transfer of solar ultraviolet (UV) radiation in the atmosphere and its relations to stratospheric ozone, aerosols and clouds. His experimental work includes monitoring of spectral UV radiation, aerosols, ozone and other trace gases with remote sensing techniques, including DOAS/MAX-DOAS, as well as instrumentation technology, data management, QA/QC procedures and development and testing of calibration procedures for spectral and broadband solar radiation instruments.

Headshot of Luke Western

Session 5: Luke Western (University of Bristol, UK)

"Why emissions of some ozone-depleting substances are still increasing"


Luke Western is now at the University of Bristol as a Marie Curie Research Fellow following 2 years working at the Global Monitoring Laboratory under the EU-funded fellowship. He mainly works on quantifying emissions of greenhouse gases and ozone-depleting substances as part of the AGAGE, and formally NOAA, networks. He was also involved in the studies tracking CFC-11 emissions to China, and the resurgence of emissions of other gases controlled under the Montreal Protocol. Luke Western was also a co-author in the 2022 WMO/UNEP Ozone Assessment.

Headshot of Alberto Redonas

Session 6: Alberto Redondas (AEMET- Meteorological State Agency, Spain)

"EUBREWNET new developments , uncertainty and updated algorithm"


Senior Scientist and ozone and spectral UV group manager at the Izaña Atmospheric Research Centre since 1995. Scientific coordinator of the Spanish Brewer Spectroradiometer Network from 1999 to 2004 and the Spanish UV Index forecast program. Participated as an investigator of the EU-projects: SUVDAMA, SUSPEN and REVUE. He has been the scientific manager of the RBCC-E since 2003, responsible for the organization of RBCC-E campaigns, including the participation in SAUNA campaigns. He has been a member of the WMO-GAW (Global Atmosphere Watch) Ozone Science Advisory Group since 2005, a member of the International Ozone Commission (IOC) from 2016 to 2024, and part of the Steering Committee of NDACC (Network for Detection of Climate Change). Vice Chairman of the COST-ACTION 1207 EUBREWNET (European Brewer Network), and now responsible for the database and QA/QC of the network. He is the Principal Investigator of the ESA project “CEOS INTERCALIBRATION OF SPECTROMETER AND LIDAR”, EGB-SVN (EarthCare Ground Base- Surface Validation Network), EMRP project ATMOZ (Traceability of Atmospheric total column Ozone) and manager of ozone calibration facility for the PANDORA network.