In this Climate Chat episode, Leon Simons and I will discuss the new communication by James Hansen titled "The Acid Test: Global Temperature in 2025" In his message, Hansen discusses what current temperatures say about his theory on why the global temperature has accelerated in recent years. Leon and I will also make an announcement about upcoming enhancements to the Climate Chat channel. Link to Hansen's "The Acid Test: Global Temperature in 2025" communication: https://www.columbia.edu/~jeh1/mailings/2025/Acid.Test.20Feb2025.pdf Link to Hansen's recent paper "Global Warming Has Accelerated: Are the United Nations and the Public Well-Informed?": https://www.tandfonline.com/doi/full/10.1080/00139157.2025.2434494 Webinar featuring James Hansen discussing the new paper: https://www.youtube.com/live/d6wOjk2OCZQ Dan' summary of Hansen's communication on Twitter/X: https://x.com/danmiller999/status/1892760127985316271 Dan' summary of Hansen's communication on Bluesky: https://bsky.app/profile/danmiller999.bsky.social/post/3linqyiknj22s Climate Chat interview with James Hansen in December 2023: "Climate Change: What to Know/What to Do with Climate Scientist James Hansen": https://youtube.com/live/8Ag3UVSrlhE Recent Climate Chat program with Leon Simons on accelerated warming: https://youtube.com/live/FospTtcVOUI Many other Climate Chat programs on accelerated warming, AMOC collapse, SRM, etc.: https://www.youtube.com/@climatechat/streams Landmark "Global Warming in the Pipeline" paper by James Hansen, Leon Simons, and others: https://academic.oup.com/oocc/article/3/1/kgad008/7335889 Leon Simons is a climate scientist based in the Netherlands. He was a co-author with James Hansen on the 2023 "Global Warming in the Pipeline" paper that discussed the recent acceleration in global warming. Leon's work has focused recently on changes in aerosol emissions from ships and the impact of those changes on climate change. You can access Leon's research writings here: https://www.researchgate.net/profile/Leon-Simons Follow Leon on X/Twitter: @LeonSimons8 and Bluesky: ‪@leonsimons.bsky.social‬ Follow Leon on Patreon: https://www.patreon.com/c/LeonSimons/home ---------------- Dan Miller has been giving talks around the world on the need for urgent climate action for over 20 years. He is co-founder of The Roda Group, a climate-tech venture capital group, and he serves as an advisor for other climate funds and climate-focused non-profit groups. He started Climate Chat in 2021 on Clubhouse and added YouTube in 2023. Follow Dan Miller on X/Twitter: @danmiller999 Follow Dan Miller on Bluesky: @danmiller999.bsky.social and @climatechat.bsky.social Follow Stacey Randecker on X/Twitter: @DrivingMzStacey and Bluesky: @bikingmzstacey.bsky.social Follow Eli Rabani on X/Twitter: @radsci and Bluesky: @radsci.bsky.social To join the Zoom discussion, visit Dan's Clubhouse room. The Clubhouse link is provided in Dan's Twitter feed. You can also leave a question in the YouTube Live chat. Please begin your question with "Question:" to make it easy for our mods to spot it. For more Climate Chat episodes, see our YouTube home page: https://www.youtube.com/@climatechat For recent YouTube Live Climate Chat programs: https://www.youtube.com/@climatechat/streams