Michael Mann+

Claude has no sense of humor.

Claude has no sense of humor.

😆

😆

you mean because of a raptorial glossal strike that would terminate in complete

you mean because of a raptorial glossal strike that would terminate in complete internal enucleation.

"Nobody other than me, that is"

"Nobody other than me, that is"

What a schmuck

What a schmuck

"Penn athletes discuss environmental awareness at Climate Week panel" by Leon Wa

"Penn athletes discuss environmental awareness at Climate Week panel" by Leon Wang for the #DailyPenn: www.thedp.com/article/2026...

Mike Johnson says #VoteBlue!

Mike Johnson says #VoteBlue!

TONIGHT 7pm. Please join us!

TONIGHT 7pm. Please join us!

"An Influential Voice in the Climate Debate Has Died at 66" | A fitting tribute

"An Influential Voice in the Climate Debate Has Died at 66" | A fitting tribute for our friend and colleague Joe Romm in the @nytimes.com by Clay Risen: www.nytimes.com/2026/10/06/c...

Yes I’ve written a few books about that

Yes I’ve written a few books about that

economists recognize the need for both supply-side and demand-side incentives.

economists recognize the need for both supply-side and demand-side incentives.

ok, sorry if I misunderstood you. It sounded like you were dismissing the effica

ok, sorry if I misunderstood you. It sounded like you were dismissing the efficacy of collective action and the importance of systemic change.

I don’t know how to say this kindly, I wrote a whole book about why such thinkin

I don’t know how to say this kindly, I wrote a whole book about why such thinking is wrongheaded and misguided.

Please read my book “The New Climate War” where I discuss the role of both indiv

Please read my book “The New Climate War” where I discuss the role of both individual actions and systemic change/collective action.

We will need both carrot (incentives for clean energy) and stick (disincentives

We will need both carrot (incentives for clean energy) and stick (disincentives for fossil fuels) to follow the needed decarbonization pathway. Anyone who tells you otherwise is selling something — probably (directly or indirectly) fossil fuels.

TODAY 5:30pm on the College Green -- Free Pizza! @penncssm.bsky.social @upenncli

TODAY 5:30pm on the College Green -- Free Pizza! @penncssm.bsky.social @upennclimate.bsky.social @upenn.edu #PennClimateWeek

The DeNiro we've been waiting for all our lives

The DeNiro we've been waiting for all our lives

#PennClimateWeek TOMORROW @upenn.edu @penncssm.bsky.social @upennclimate.bsky.so

#PennClimateWeek TOMORROW @upenn.edu @penncssm.bsky.social @upennclimate.bsky.social

Cos-Tan-Za

Cos-Tan-Za

are we not Menn? We are Devo!

are we not Menn? We are Devo!

😆👍

😆👍

🙏

🙏

But far more likely the director, since he was in attendance at the premier (and

But far more likely the director, since he was in attendance at the premier (and I was not)

Join me on Oct 6 at 7pm for “Can Scientists Help Fix Congress?”, a panel moderat

Join me on Oct 6 at 7pm for “Can Scientists Help Fix Congress?”, a panel moderated by me. This discussion features a live inside look at the researchers taking their expertise to Congress. Event is hosted online via Zoom. us06web.zoom.us/webinar/regi...

and ironically, the A.I. crisis and climate crisis are inseparable, as @peterhot

and ironically, the A.I. crisis and climate crisis are inseparable, as @peterhotezmdphd.bsky.social & I underscore in "Science Under Siege"

yep---but needless to say, some outlets and journalists are doing all they can.

yep---but needless to say, some outlets and journalists are doing all they can. Thanks for all that you and your colleagues do at @sfchronicle.com -- have been honored to write several op-eds for you folks!

Typically dissipates within a year. See our recent study: www.pnas.org/doi/10.10

Typically dissipates within a year. See our recent study: www.pnas.org/doi/10.1073/...

Second of two events I'll be doing in the U.K. during the week of Oct 12 | I wil

Second of two events I'll be doing in the U.K. during the week of Oct 12 | I will be in conversation at the #OxfordUnion in Oxford, 5pm Thurs Oct 15: issuu.com/oxfordunion/...

First of two events I'll be doing in the U.K. during the week of Oct 12 | "Insig

First of two events I'll be doing in the U.K. during the week of Oct 12 | "Insight lecture" on #ScienceUnderSiege at the #CrickInstitute in London, 4pm Wed Oct 14: michaelmann.net/events/scien...

This despite record global temperatures & extreme weather events. It didn't hap

This despite record global temperatures & extreme weather events. It didn't happen by accident. It's a predictable consequence of Trump/GOP assault on the media coupled w/ plutocratic capture of media outfits and platforms.

From the latest @yaleclimatecomm.bsky.social survey: "The percentage of register

From the latest @yaleclimatecomm.bsky.social survey: "The percentage of registered voters who say they hear about global warming in the media dropped 11 percentage points from 2024 (30%) to 2025 (19%), which is the lowest it has been since the question was first asked in 2015." This is on you media!

probably not

probably not

" El Niño could put Washington’s coastal towns in hot water" by @heyjohnryan.bsk

" El Niño could put Washington’s coastal towns in hot water" by @heyjohnryan.bsky.social for @kuow.org Public Radio: www.kuow.org/environment/...

well, there's both the upwelling and downwelling Kevin wave. I've seen them both

well, there's both the upwelling and downwelling Kevin wave. I've seen them both, trust me.

thanks Aaron--yes, someone else alerted me to this. Will have to check it out.

thanks Aaron--yes, someone else alerted me to this. Will have to check it out.

Well Kevin has lots of strong opinions. I agree with many--but certainly not all

Well Kevin has lots of strong opinions. I agree with many--but certainly not all--of them.

yes, the Nino3.4 region was originally motivated by Trenberth and Barnston, as I

yes, the Nino3.4 region was originally motivated by Trenberth and Barnston, as I understand it, by the teleconnections tied to anomalies in that specific region.

👍

👍

nice thread Daniel, but I'm not sure I get your point here. If we're interested

nice thread Daniel, but I'm not sure I get your point here. If we're interested in global influence on ocean heat & evaporation, we wouldn't look to the Nino3.4 region anyway, we'd look further west where absolute SSTs are still the highest:

New record global sea surface temperature anomaly. This El Niño is for reals pul

New record global sea surface temperature anomaly. This El Niño is for reals pulse.climate.copernicus.eu

"Ask not what Trump can do for you. Ask what you can do for Trump" --

"Ask not what Trump can do for you. Ask what you can do for Trump" -- John N. Kennedy

Because the Kennedy name has been so devalued over the past two years it’s expec

Because the Kennedy name has been so devalued over the past two years it’s expected

Easy mistake

Easy mistake

Did I say that the climate porn is getting out of hand?

Did I say that the climate porn is getting out of hand?

Yes, the "Soros" bit was added by me, making this an exemplar of Poe's Law.

Yes, the "Soros" bit was added by me, making this an exemplar of Poe's Law.

Are they smartwool?

Are they smartwool?

Wouldn’t it have been much easier to record which countries had actually stayed?

Wouldn’t it have been much easier to record which countries had actually stayed?

"How Does Climate Change Impact Nor'easters?" by Simmone Shah for #Time: time.co

"How Does Climate Change Impact Nor'easters?" by Simmone Shah for #Time: time.com/article/2026...

"Even though change isn’t fast enough, the University of Pennsylvania’s Michael

"Even though change isn’t fast enough, the University of Pennsylvania’s Michael Mann said Gore’s tone is crucial: “Doomism, despair and disengagement is the greatest threat at this point. We must not fall victim to it.”"

"Former VP Al Gore: A clean Earth is within world’s grasp even as climate danger

"Former VP Al Gore: A clean Earth is within world’s grasp even as climate dangers accelerate" by @borenbears.bsky.social for @apnews.com: apnews.com/article/al-g...

Our study from last year: omnia.sas.upenn.edu/story/strong...

Our study from last year: omnia.sas.upenn.edu/story/strong...

‘Fundamentally unprotected and highly vulnerable’: Boston is a sitting duck for

‘Fundamentally unprotected and highly vulnerable’: Boston is a sitting duck for the next generation of powerful storms | Great article by Kate Selig and Niki Griswold for The @bostonglobe.com: www.bostonglobe.com/2026/09/25/s...

That would be some poetic justice, wouldn't it.

That would be some poetic justice, wouldn't it.

Here’s some old news: His father, John Sununu, while chief of staff for Presiden

Here’s some old news: His father, John Sununu, while chief of staff for President George HW Bush, before resigning in 1991, sabotaged the best opportunity we had to act on climate before it would reach catastrophic proportions.

"Posts baselessly praise cloud seeding bans for quiet Atlantic hurricane season"

"Posts baselessly praise cloud seeding bans for quiet Atlantic hurricane season" by @manonjacob.bsky.social for @afp.com: factcheck.afp.com/doc.afp.com....

Global average sea surface temperature anomaly (departure from the climatologica

Global average sea surface temperature anomaly (departure from the climatological seasonal average) is poised to set a new record, thanks to steady warming combined with a monster El Niño event: pulse.climate.copernicus.eu

who wore it better?

who wore it better?

And to avoid filling his 20 byte buffer

And to avoid filling his 20 byte buffer

So does a Magic Eight Ball

So does a Magic Eight Ball

but so is Tommy

but so is Tommy

Can we at least agree that A.I. has now exceeded the lower bound of human intell

Can we at least agree that A.I. has now exceeded the lower bound of human intelligence

thanks so much Valerie--really appreciate that!

thanks so much Valerie--really appreciate that!

thanks!

thanks!

GOP strategists are finally realizing that the American people are a lot more sc

GOP strategists are finally realizing that the American people are a lot more scared about the influence of a few white male billionaires than a whole bunch of people with darker skin.

Yes--El Niño is actually a real thing.

Yes--El Niño is actually a real thing.

hey, she was just trying help out women scientist [sic] and engineers. We should

hey, she was just trying help out women scientist [sic] and engineers. We should applaud that!

thank you Jane!

thank you Jane!

😆👍

😆👍

I was going for a dark, gothic Neil Diamond

I was going for a dark, gothic Neil Diamond

I discussed the "Godzilla" El Niño and how it's likely to combine with human-cau

I discussed the "Godzilla" El Niño and how it's likely to combine with human-caused warming to supercharge extreme weather in the months ahead with @caitrionaperry.bsky.social of #BBCNews, live from #ClimateWeekNYC

Join me TOMORROW from 3-5pm in NYC for a panel discussion hosted by @standupfors

Join me TOMORROW from 3-5pm in NYC for a panel discussion hosted by @standupforscience.net as part of #ClimateWeekNYC. My fellow panelists and I will discuss how climate science shapes policy and where we struggle to act. More info here: www.climateweeknyc.org/event-search...

closer to 6:45pm ET

closer to 6:45pm ET

I'll be talking w/ @caitrionaperry.bsky.social on #BBCNews at 6:30pm ET (11:30pm

I'll be talking w/ @caitrionaperry.bsky.social on #BBCNews at 6:30pm ET (11:30pm London local time) about the record El Niño, the ongoing human-caused warming of the planet, the U.N. summit and the politics of climate denial and inaction going into the U.S. midterm elections: www.bbc.com/live

Sorry Matt, but you guys own it! 😆

Sorry Matt, but you guys own it! 😆

"Stand Up for Science’s Climate Week Discussion Panel to Tackle Science, Democra

"Stand Up for Science’s Climate Week Discussion Panel to Tackle Science, Democracy and Climate Tomorrow" via Char Bowling for #EINNews: uspolitics.einnews.com/pr_news/9442...

😆👍 carry on...

😆👍 carry on...

Hey @yellowdotstudios.bsky.social. This is *next level* climate porn www.youtube

Hey @yellowdotstudios.bsky.social. This is *next level* climate porn www.youtube.com/watch?v=xbQQ...

Yes, this is a huge El Niño. No, @theguardian.com we do not have a reliable thou

Yes, this is a huge El Niño. No, @theguardian.com we do not have a reliable thousand year-long record of El Niño (e.g. a continuous reconstruction of the Niño3 or Niño3.4 SST index) so this statement is not warranted. What's the attribution for that claim?

"Fry Eagles, Fry" #ClimateCrisis

"Fry Eagles, Fry" #ClimateCrisis

You can still tell he's lying though...

You can still tell he's lying though...

But I remain a big fan of the Thunbergs. Thanks for all you do! 🙂🙏💚

But I remain a big fan of the Thunbergs. Thanks for all you do! 🙂🙏💚

See above: bsky.app/profile/did:...

See above: bsky.app/profile/did:...

Nope: bsky.app/profile/did:...

Nope: bsky.app/profile/did:...

NO! This study definitely does *not* provide a continuous reconstruction of El N

NO! This study definitely does *not* provide a continuous reconstruction of El Niño spanning the past millennium. In fact, my main criticism was that it is *missing* critical (based on our own climate model simulations) segments. See this thread: bsky.app/profile/mich...