Kevin Trenberth Public Lecture: Extreme Weather and Its Links to Climate Change

This is a recording of a public lecture on the link between extreme weather and climate change. The speaker, Kevin Trenberth, is a distinguished senior scientist in the Climate Analysis Section at the U.S. National Center for Atmospheric Research, with decades of experience studying climate systems and extreme events. Drawing on his authoritative academic perspective, the video is designed to break down a key question for the public: how global warming fuels extreme weather. The core highlight lies in Trenberth's clear, intuitive explanations, which turn the complex scientific question—"are heatwaves, heavy rains, hurricanes, and other extreme events directly caused by climate change?"—into an understandable chain of reasoning. He places particular emphasis on the role of a changing climate background: as greenhouse gases accumulate in the atmosphere, the environment becomes warmer and wetter, amplifying the intensity and frequency of extreme weather. Through case studies and data, he explains why we cannot simply say that a given disaster was "caused" by climate change, but we can say with confidence that climate change made it more likely and more severe. This rigorous yet accessible framing helps viewers move beyond black-and-white thinking. This video is well suited for weather enthusiasts, students in geography and environmental science, and members of the general public interested in climate issues. Viewers are advised to pay attention to his metaphorical explanations of the "energy budget" and the "intensified water cycle," and to jot down key conclusions for further reading. If time is limited, the first 20 minutes—covering the core discussion—should be prioritized.