James Edward Hansen

Director of Climate Science, Awareness and Solutions at Columbia U | @drjamesehansen.bsky.social |

[James Edward Hansen @DrJamesEHansen]

The race is on. The stakes are high. Understanding. Without that, why should anybody listen?
See Beware Media Hype – https://t.co/wiebJMiU7h

Also available on Substack: https://t.co/v6gYAiXnMi

[James Edward Hansen @DrJamesEHansen]

Yes, we project that 2026 will be the warmest year. If others will provide the physical basis for their projections, we have an opportunity to learn something from this natural “experiment.”
See 2026 Experiment – https://t.co/Bitp8xOTrN
Also available on Substack: https://t.co/fEs9vT5GTb

[James Edward Hansen @DrJamesEHansen]

Our publisher prefers that we not send out more draft chapters of Sophie's Planet, but we must remember our friend Rafe, a big, gregarious, warmhearted fellow, who fought for the future of young people and future generations. See Pomerance– https://t.co/2F1tvGd4fF
Also available on Substack: https://t.co/DWUHmOekpP

[James Edward Hansen @DrJamesEHansen]

Sometimes the most complex problems have a straight-forward solution – let’s start gathering the evidence.
See Exxon – https://t.co/aT2fu2g0a6
Also available on Substack: https://t.co/FqG18r5Gfw

[James Edward Hansen @DrJamesEHansen]

A 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://t.co/pibt5vntpB

Also available on Substack: https://t.co/AGbLucDGOT

[James Edward Hansen @DrJamesEHansen]

Yes, 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://t.co/d16qZW0Wkl
Also available on Substack: https://t.co/6OBpEMaMZP

[James Edward Hansen @DrJamesEHansen]

The Nino index (Nino3.4) has just reached Nino-neutral, but global SST (sea surface temperature) has matched the highest level for this date, which was achieved during the last El Nino.
Super warming is clear. Look for a global temperature soon of at least +1.7C, even if the "Super" El Nino turns out to be half-baked.

The University of Maine Climate Change Institute has a spectacular interactive graphic that they update daily. It is a valuable research and communications tool.

Link to graph: https://t.co/GDbTxtMGy8

[James Edward Hansen @DrJamesEHansen]

El Nino strength is important, but the extraordinary, accelerating, warming of global sea surface temperatures is much more important.
See Super El Nino? – https://t.co/XDx6twAJMb
Also available on Substack: https://t.co/3sGRr26MNR

[James Edward Hansen @DrJamesEHansen]

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 – https://t.co/WSXDAcO1Xf
Also available on Substack: https://t.co/pjMWPKN4DP

[James Edward Hansen @DrJamesEHansen]

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: https://t.co/Xj64zEZlZQ Also available on Substack: https://t.co/tmXiqhGrdJ

[James Edward Hansen @DrJamesEHansen]

The presumed upcoming El Nino will help cement and quantify global warming acceleration, showing that 2ºC global warming is likely to be reached in the 2030s, not at midcentury.

See Another El Nino Already? - https://t.co/qmFaATJcKR

Also available on Substack: https://t.co/SkXb6Mn5Zk

[James Edward Hansen @DrJamesEHansen]

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 – https://t.co/slajQ0m6oN
Also available on Substack: https://t.co/YlkJbYRmy5

[James Edward Hansen @DrJamesEHansen]

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. – https://t.co/TCn4N6J0QX

Also available on Substack:
https://t.co/o53glTSltW

[James Edward Hansen @DrJamesEHansen]

Three things, all at once, all the time, if you want better understanding and answers sooner – https://t.co/HmEARG2WOT
Also available on Substack: https://t.co/cerfnmgE0E

[James Edward Hansen @DrJamesEHansen]

@RARohde @LeonSimons8 @hausfath @e_philalethes Hi Robert, good to hear from you. Reliable data, at best, support global maps back to the 1950s and global mean to ~1880. The 1850-1900 base is manufactured, model-dependent. It's easy to shift base period for the global mean, but 1880-1920 is our earliest data-based base period.

[James Edward Hansen @DrJamesEHansen]

Let’s see what we can learn from temperature change in the next two years – https://t.co/njUDhxsSGp
Also available on Substack: https://t.co/E6AryVycEc

[James Edward Hansen @DrJamesEHansen]

Warning! This colorful chart is censored by IPCC - https://t.co/Wmxxhm8uV4
Also available on Substack: https://t.co/PcrBkZMByz

[James Edward Hansen @DrJamesEHansen]

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: https://t.co/ct6v5WoQL7