Director of Climate Science, Awareness and Solutions at Columbia University http://csas.earth.columbia.edu | Formerly Director of NASA GISS | jimehansen.substack.com columbia.edu/~jeh1/https://bsky.app/profile/drjamesehansen.bsky.socialhttps://bsky.app/profile/drjamesehansen.bsky.social/post/3mkpohnvyrs2gA physics-based analysis concludes that this year will be the warmest, not second warmest. In any case, we can learn something about climate change. See 2026 On Track for Warmest Year – https://mailchi.mp/caa/2026-on-track-for-warmest-year Also available on Substack: https://jimehansen.substack.com/p/2026-on-track-for-warmest-year30 Apr 2026 13:04 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3mkpohnvyrs2ghttps://bsky.app/profile/drjamesehansen.bsky.social/post/3mjk2jyvabc22Yes, we have an El Nino – probably Super-Duper – see the better diagnostic (Fig. 2) – comparison to ordinary and Super El Ninos See Super-Duper El Nino: https://mailchi.mp/caa/super-duper-el-nino Also available on Substack: https://jimehansen.substack.com/p/super-duper-el-nino15 Apr 2026 13:59 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3mjk2jyvabc22https://bsky.app/profile/drjamesehansen.bsky.social/post/3mieeowgq5c2vThe Nino index (Nino3.4) has just reached neutral, but global SST has matched the highest level for this date, which was achieved during the last El Nino. Super warming is clear. U of Maine Climate Change Institute has a spectacular interactive graphic that they update daily. tinyurl.com/2kj82pwa31 Mar 2026 14:20 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3mieeowgq5c2vhttps://bsky.app/profile/drjamesehansen.bsky.social/post/3mhioy64x7s2yEl Nino strength is important, but the extraordinary, accelerating, warming of global sea surface temperatures is much more important. See Super El Nino? – https://mailchi.mp/caa/super-el-nino-super-warming-is-the-main-issue Also available on Substack: https://jimehansen.substack.com/p/super-el-nino-super-warming-is-the20 Mar 2026 14:09 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3mhioy64x7s2yhttps://bsky.app/profile/drjamesehansen.bsky.social/post/3mgfmwpia5s2fThere is a limit on how far we can let climate run away now, if we are to give the next generation an opportunity. See Runaway – https://mailchi.mp/caa/runaway-climate-the-point-of-no-return Also available on Substack: https://jimehansen.substack.com/p/runaway-climate-the-point-of-no-return06 Mar 2026 15:29 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3mgfmwpia5s2fhttps://bsky.app/profile/drjamesehansen.bsky.social/post/3mf7x3pf7322gScience-based policies could successfully limit human-caused climate change, but when political parties are allowed to accept money from special interests, policies are distorted to the point of being ineffective. See Politics: tiny.cc/9f6z001 Also available on Substack: tiny.cc/cf6z00119 Feb 2026 15:50 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3mf7x3pf7322ghttps://bsky.app/profile/drjamesehansen.bsky.social/post/3me77lcsvoc2kThe presumed upcoming El Nino will help cement and quantify global warming acceleration, showing that 2C global warming is likely to be reached in the 2030s, not at midcentury. See Another El Nino Already? https://mailchi.mp/caa/another-el-nino-already-what-can-we-learn-from-it Also available on Substack: https://jimehansen.substack.com/p/another-el-nino-already-what-can06 Feb 2026 15:24 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3me77lcsvoc2khttps://bsky.app/profile/drjamesehansen.bsky.social/post/3mdnl2jna3c2mThe chaos in government today has potential to seed huge gains a few years from now; more on that later. For now we must stem disastrous ideas. See Fix Our Forests Fiasco – https://mailchi.mp/caa/fix-our-forests-fiasco Also available on Substack: https://jimehansen.substack.com/p/fix-our-forests-fiasco30 Jan 2026 15:01 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3mdnl2jna3c2mhttps://bsky.app/profile/drjamesehansen.bsky.social/post/3mczguavj5k2aIt’s asking a lot to expect young people to understand the real climate story. I’m thrilled to learn that many of them may be open-minded mavericks. – mailchi.mp/caa/mavericks Also available on Substack: jimehansen.substack.com/p/mavericks22 Jan 2026 14:53 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3mczguavj5k2ahttps://bsky.app/profile/drjamesehansen.bsky.social/post/3mcdnaw3igk25Three things, all at once, all the time, if you want better understanding and answers sooner – https://mailchi.mp/caa/three-things-all-at-once-all-the-time Also available on Substack: https://jimehansen.substack.com/p/three-things-all-at-once-all-the13 Jan 2026 22:49 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3mcdnaw3igk25https://bsky.app/profile/drjamesehansen.bsky.social/post/3mabezmr4ic2kLet’s see what we can learn from temperature change in the next two years – https://mailchi.mp/caa/global-temperature-in-2025-2026-2027 Also available on Substack: https://jimehansen.substack.com/.../global-temperature-in...18 Dec 2025 14:26 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3mabezmr4ic2khttps://bsky.app/profile/drjamesehansen.bsky.social/post/3m65m4zkrt222Warning! This colorful chart is censored by IPCC - https://mailchi.mp/caa/warning-this-colorful-chart-is-censored-by-ipcc Also available on Substack: https://jimehansen.substack.com/p/warning-this-colorful-chart-is-censored21 Nov 2025 15:32 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3m65m4zkrt222https://bsky.app/profile/drjamesehansen.bsky.social/post/3m5bw5npsj22oI have been notified that the video link to my Helsinki talk does not work for some people. Here's an alternative link for those who prefer a YouTube version: youtu.be/D2abyXGvELI https://youtu.be/D2abyXGvELI10 Nov 2025 15:17 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3m5bw5npsj22ohttps://bsky.app/profile/drjamesehansen.bsky.social/post/3m52dwzke7k22Climate talk in Helsinki at request of young people standing up for their future - https://mailchi.mp/caa/a-climate-talk-in-helsinki Also available on Substack: https://jimehansen.substack.com/p/a-climate-talk-in-helsinki Video: https://drive.google.com/file/d/1NGOp39Ui7UiteVds85mFkY-9NdwoiyDZ/view07 Nov 2025 15:02 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3m52dwzke7k22https://bsky.app/profile/drjamesehansen.bsky.social/post/3lyxebidrjc2jPredictably, soon, most young people will reject extremist views. Nature’s Corridor (draft Chapter 1 of Sophie’s Planet) could help heal wounds of the past. https://mailchi.mp/caa/natures-corridor Also available on Substack: https://jimehansen.substack.com/p/natures-corridor16 Sep 2025 12:50 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3lyxebidrjc2jhttps://bsky.app/profile/drjamesehansen.bsky.social/post/3lxhh6zb5ac27Draft Chapter 10 of Sophie’s Planet, Venus Syndrome & Runaway Climate (https://mailchi.mp/caa/chapter-10-the-venus-syndrome-runaway-climate) is an introduction (also available on Substack: https://jimehansen.substack.com/p/chapter-10-the-venus-syndrome-and). Quantitative analysis with insights on climate physics will follow.28 Aug 2025 11:34 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3lxhh6zb5ac27https://bsky.app/profile/drjamesehansen.bsky.social/post/3lvq6mo77ns2nWe, and young people, need help from people who understand the essence of climate science. See Forest versus Trees - https://columbia.edu/~jeh1/mailings/2025/ForestTrees.06August2025.pdf or its abbreviation - https://mailchi.mp/caa/seeing-the-forest-for-the-trees also available on my Substack - https://jimehansen.substack.com/p/seeing-the-forest-for-the-trees06 Aug 2025 12:04 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3lvq6mo77ns2nhttps://bsky.app/profile/drjamesehansen.bsky.social/post/3luagsqol6s27Draft Preface for Sophie’s Planet. Criticisms welcome. See 17 July - Sophie’s Planet - https://mailchi.mp/caa/sophies-planet-wxuety8mzk18 Jul 2025 12:23 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3luagsqol6s27https://bsky.app/profile/drjamesehansen.bsky.social/post/3lthd2dtvms2nThe GISS Formula for scientific research cannot be exterminated. See 8 July - A Formula to Keep the Science Flame Burning - https://mailchi.mp/caa/a-formula-to-keep-the-science-flame-burning08 Jul 2025 12:39 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3lthd2dtvms2nhttps://bsky.app/profile/drjamesehansen.bsky.social/post/3lpregceu6c2qThere is time for a thoughtful view of our fellow creatures and habitat. See 22 May - End of an Era - https://mailchi.mp/caa/end-of-an-era22 May 2025 14:49 +0000at://did:plc:ettmheutp2gduer7qtszv4pc/app.bsky.feed.post/3lpregceu6c2q