James Hansen

James Hansen

@drjamesehansen.bsky.social

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/

2,012 Followers 4 Following 20 Posts Joined May 2025
1 week ago
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There 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 – mailchi.mp/caa/runaway-...
Also available on Substack: jimehansen.substack.com/p/runaway-cl...

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3 weeks ago
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Science-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/cf6z001

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1 month ago

And then I misspelled Cal's nickname (The Big Dumper) and none of my young coauthors caught it -- are there no baseball fans among young people?

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1 month ago
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The 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? mailchi.mp/caa/another-... Also available on Substack: jimehansen.substack.com/p/another-el...

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1 month ago
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The 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 – mailchi.mp/caa/fix-our-...
Also available on Substack: jimehansen.substack.com/p/fix-our-fo...

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1 month ago
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It’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/mavericks

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1 month ago
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Three things, all at once, all the time, if you want better understanding and answers sooner – mailchi.mp/caa/three-th...
Also available on Substack: jimehansen.substack.com/p/three-thin...

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2 months ago
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Let’s see what we can learn from temperature change in the next two years – mailchi.mp/caa/global-t...
Also available on Substack: jimehansen.substack.com/.../global-t....

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3 months ago
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Warning! This colorful chart is censored by IPCC - mailchi.mp/caa/warning-...
Also available on Substack: jimehansen.substack.com/p/warning-th...

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4 months ago

This issue is the potential catastrophic consequences, if we let the ice shelves melt to the point that the West Antarctic ice sheet collapses -- increased snowfall is negligible by comparison.

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4 months ago

The ocean warming is causing ice shelves to melt, but, as you know from the ice cubes in your drink, melting of ice in the ocean has no effect on sea level. Small ongoing sea level changes, whichever direction, have modest impact.

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4 months ago

I have not had time to look at data, but such a result is possible temporarily. Accelerated global warming is causing increased snowfall over ice sheets, especially Antarctica -- and this shows up as at least intermittent ice sheet mass gain in gravity satellite data.

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4 months ago
YouTube
James Hansen - Climate Reckoning in ATLAS25, Operaatio Arktis, Helsinki, Finland YouTube video by Climate Science, Awareness and Solutions

I 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

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4 months ago
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Climate talk in Helsinki at request of young people standing up for their future - mailchi.mp/caa/a-climat...
Also available on Substack: jimehansen.substack.com/p/a-climate-...

Video: drive.google.com/file/d/1NGOp...

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5 months ago
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Predictably, 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. mailchi.mp/caa/natures-...

Also available on Substack: jimehansen.substack.com/p/natures-co...

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6 months ago
Preview
Chapter 10. The Venus Syndrome & Runaway Climate James Hansen

Draft Chapter 10 of Sophie’s Planet, Venus Syndrome & Runaway Climate (mailchi.mp/caa/chapter-...) is an introduction (also available on Substack: jimehansen.substack.com/p/chapter-10...). Quantitative analysis with insights on climate physics will follow.

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7 months ago
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We, and young people, need help from people who understand the essence of climate science. See Forest versus Trees - columbia.edu/~jeh1/mailin... or its abbreviation - mailchi.mp/caa/seeing-t... also available on my Substack - jimehansen.substack.com/p/seeing-the...

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7 months ago
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Draft Preface for Sophie’s Planet. Criticisms welcome. See 17 July - Sophie’s Planet - mailchi.mp/caa/sophies-...

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8 months ago
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The GISS Formula for scientific research cannot be exterminated. See 8 July - A Formula to Keep the Science Flame Burning - mailchi.mp/caa/a-formul...

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9 months ago
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There is time for a thoughtful view of our fellow creatures and habitat. See 22 May - End of an Era - mailchi.mp/caa/end-of-a...

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