Game Changers Online Seminars


Sun, Climate and Ozone: 1850–2100

with Judith Lean (University of Colorado, and Space Science Division (Emeritus), Naval Research Lab., Washington DC, USA)

Thursday, 29th June 2023, 17h CEST, 11h EDT 

Please click on this Link for the Zoom Session >>

Meeting ID: 852 6990 9362        Password: 459004

As Earth’s energy source and a variable star, the Sun has been credited over the past century with causing climate change that is a significant fraction of industrial-era warming… or so small as to be undetectable. Now, with more than forty years of space-based observations of solar irradiance and multiple geophysical quantities, and extensive advances in modelling solar irradiance and terrestrial variability, we can clarify with greater certainty the extent to which the Sun alters Earth’s environment, especially since 1850. This talk summarizes current observational evidence for the Sun’s role in global climate change and ozone-depletion recovery, and discusses the scientific (and societal) consequences of faulty detection and attribution.

Judith Lean is a senior scientist at the United States Naval Research Laboratory. She is a solar and climate scientist and her research focuses on the mechanisms and measurements of variations in the Sun’s radiative output at all wavelengths, and the effects of this variability on Earth, from the surface to space. Past Co-Investigator on UARS and SORCE missions. Testified to the US Congress on the role of solar output variations in climate change; chaired the National Research Council’s (NRC) Working Group on Solar Influences on Global Change. Served on multiple NSF, NOAA, NRC and NASA advisory committees. Author of more than 150 published papers and 300 presentations. Model reconstructions of solar irradiance variability have been used in multiple climate change simulations, including IPCC. American Geophysical Union Fellow (2002), US National Academy of Sciences member (2003), American Philosophical Society member (2013). Presidential Rank Award for Meritorious Senior Professional (2011).

Starting in the summer of 2020, the International Space Science Institute has organized the weekly on-line seminar series called “Game Changers”. After six series of weekly talks on the themes of “Missions that Changed the Game in Solar System, Astrophysics and Earth Sciences” , “Ideas and Findings about the Solar System, the Universe and our Terrestrial Environment”,“Habitability – From Cosmic to Microbial Scales”, “Viewing Earth from Space – the Changing Environment and Climate of our Planet”,  and “Captivating Cosmology: From the Big Bang to Tomorrow”  and  the topic Space Environmental Hazards: Mitigation and Prediction”, the webinar series continues on a monthly basis.

All webinars are recorded an can be watched here: Recorded Game Changers Seminars >>

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