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John Kennedy

@micefearboggis@fediscience.org
mastodon 4.6.9
  • Open on fediscience.org

Climate scientist, diagram monkey, probabilistic historian and scientific illustrator. Occasional glass engraver, embroiderer, and computer 3d stuff-er. He/him

Currently head of climate information at WMO.

All views and opinions are my own. This is not, sadly, a promise of novelty: it's a disclaimer. Though, on reflection, it sounds slightly megalomaniacal. All views? Really?! No, just the ones I express.

0 Followers
0 Following
29 Posts
Joined July 27, 2020
Website:
https://www.jkclimate.fr/
Blog:
https://diagrammonkey.wordpress.com/author/diagrammonkey/
Github:
https://github.com/jjk-code-otter
ORCID:
https://orcid.org/0000-0002-6841-7289
Open post
John Kennedy @micefearboggis@fediscience.org
· 10mo ago

Hey! I’m CEO of a company that has just raised $10 billion for an app that takes the hard work out of enjoying music. Did you know, some people waste hours each day listening to “tunes”. Our AI will listen to it for you and summarise it in a 15 second scream leaving you more time to focus on what's really important in life: adding value.

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Open post
John Kennedy @micefearboggis@fediscience.org
· 10mo ago
Replying to
@ltning@pleroma.anduin.net When I had the idea at three this morning, it took me rather too long to realise too.
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Open post
John Kennedy @micefearboggis@fediscience.org
· 6mo ago

What’s a zettajoule?

With approximations and back-of-an-envelope stuff that will make you cry.

https://diagrammonkey.wordpress.com/2026/03/28/whats-a-zettajoule/

What’s a zettajoule?
Diagram Monkey

What’s a zettajoule?

The joule is the unit of energy. One zettajoule (ZJ) is 1,000,000,000,000,000,000,000 Joules. One times ten to the power of twenty one Joules. One followed by twenty one zeroes Joules. I will tell …

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Open post
John Kennedy @micefearboggis@fediscience.org
· 7mo ago

OK, that's one glowing AI article too many in Nature and one cosy fireside editorial too many from Science.

Can we have a prestige journal with a bit of attitude please, a little bite, a hint of tooth. Articles I want to read not shred. Papers the authors might actually have enjoyed writing.

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Open post
John Kennedy @micefearboggis@fediscience.org
· 10mo ago
Replying to
@expertenkommision_cyberunfall@mastodon.social There's a prototype app, [legal disclaimer: at the moment the AI model is still being trained, so the scream emanates from a hell portal that we keep open in Slough. No one has noticed.]
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Open post
John Kennedy @micefearboggis@fediscience.org
· 6mo ago

Not waving but drowning

When climate sceptics outsource their handwaving to AI the results are... predictable.

[With lovingly crafted 100% human MS Paint original artwork.]

https://diagrammonkey.wordpress.com/2026/03/12/not-waving-but-drowning/

Not waving but drowning
Diagram Monkey

Not waving but drowning

It’s not often one gets a paper on uncertainty in estimates of ocean heat content written by a clarinettist whose wikipedia page has a section on their extra curricular activities that goes &…

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Open post
John Kennedy @micefearboggis@fediscience.org
· 7mo ago
Replying to
@Brad_Rosenheim Yes! Monitoring of tipping points and earth system feedbacks would be good to do. I looked through the 374 page tipping points report (https://global-tipping-points.org/) that came out before COP last year and saw one example of something actually being measured. Most of the tipping points remained somewhat nebulous, modelled risks, schematics etc. Occasionally, a paper will come out with a suggestion, but I don't know of anyone doing routine monitoring of tipping points, at least not the way we monitor global temperature, say. Probably ignorance on my part. However, it seems difficult too. Part of the difficulty is the availability of obs. Part of the difficulty is communication. Part of the difficulty is time scales which can be long with important changes stretched out over decades. Part of the difficulty is that, in many cases, we won't know when we've passed a tipping point even if we're watching it very closely.
global-tipping-points.org
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Open post
John Kennedy @micefearboggis@fediscience.org
· 7mo ago

For a rainy day

Has global warming accelerated? Why? How much? How do we know? What does it all mean? etc. With hand-drawn illustrations, dodgy metaphors, and a complete lack of clear answers.

https://diagrammonkey.wordpress.com/2026/03/07/for-a-rainy-day/

diagrammonkey.wordpress.com
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Open post
John Kennedy @micefearboggis@fediscience.org
· 10mo ago
Replying to
@jarjan@mederland.nl What's a bandcamp?
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Open post
John Kennedy @micefearboggis@fediscience.org
· 10mo ago
Replying to
@martind@mastodon.online Are there more bad ideas nowadays or is it just that we're more likely to hear about them?
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Open post
John Kennedy @micefearboggis@fediscience.org
· 10mo ago
Replying to
@drj@typo.social Ah... so *that's* what happened.
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Open post
John Kennedy @micefearboggis@fediscience.org
· 7mo ago

Word of the day is verisimilitude

On data, reality, realism, the texture of reality and, yes, verisimilitude.

https://diagrammonkey.wordpress.com/2026/03/03/verisimilitude/

diagrammonkey.wordpress.com
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Open post
John Kennedy @micefearboggis@fediscience.org
· 10mo ago
Replying to
@bit101@mstdn.social I need to recalibrate.
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Open post
John Kennedy @micefearboggis@fediscience.org
· 44mo ago
Replying to
@L_howes@mastodon.social All you need to do now is write the article. That should fix everything up, I think.
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Open post
John Kennedy @micefearboggis@fediscience.org
· 11mo ago
Replying to
@Ashedryden@xoxo.zone I had to travel to Egypt for work and the only ways to contact the Egyptian embassy were Facebook and WhatsApp.
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Open post
John Kennedy @micefearboggis@fediscience.org
· 17mo ago
Replying to
@wonderofscience@mastodon.social They are though, aren't they.
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Open post
John Kennedy @micefearboggis@fediscience.org
· 33mo ago
Replying to
@steve One can imagine the confusion caused by replying to the question "have we passed 1.5C?" by saying "maybe" for ten years. Or more.
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Open post
John Kennedy @micefearboggis@fediscience.org
· 7mo ago
How well can we quantify when 1.5 °C of global warming has been exceeded? Open review until 11 March https://essd.copernicus.org/preprints/essd-2025-825/
essd.copernicus.org
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Open post
John Kennedy @micefearboggis@fediscience.org
· 33mo ago
Replying to
@steve Uncertainty in the pre-industrial baseline is roughly a quarter of a degree, varies with season and isn't well constrained for daily temperatures.
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Open post
John Kennedy @micefearboggis@fediscience.org
· 33mo ago
Replying to
@steve Simple clear messaging *that's in line with the underlying science* matters. The 1.48C in the lede is missing an uncertainty estimate too. The difficulty for the plot is, which pre-industrial baseline do you pick? The dataset Copernicus produce only goes back to 1940, so the BBC would have to choose a method for converting to a pre-industrial baseline. There are multiple methods. The method you choose changes the message. See https://diagrammonkey.wordpress.com/2023/11/22/will-we-reach-1-5c-in-2023-or-2c-on-tuesday/ for a more detailed analysis
Will we reach 1.5°C in 2023 or 2°C on Tuesday?
Diagram Monkey

Will we reach 1.5°C in 2023 or 2°C on Tuesday?

The short answer to this question, at least if we’re thinking in terms of the Paris Agreement, is no. The Paris Agreement limits at 1.5°C and 2°C above pre-industrial are typically considered to be…

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Open post
John Kennedy @micefearboggis@fediscience.org
· 33mo ago
Replying to
@steve I agree absolutely. I think that to do that, we need to communicate uncertainty in global temperature before we get into that situation.
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John Kennedy @micefearboggis@fediscience.org
· 6mo ago

Centennial Observing Stations State of Recognition Report

Long station series are vital for monitoring long-term environmental change. The report recognises 474 long-term observing stations worldwide including 10 that have been operating for more than 250 years.

https://library.wmo.int/records/item/58048-centennial-observing-stations-state-of-recognition-report-2025

library.wmo.int
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Open post
John Kennedy @micefearboggis@fediscience.org
· 6mo ago

Not waving but drowning

https://diagrammonkey.wordpress.com/2026/03/12/not-waving-but-drowning/

Not waving but drowning
Diagram Monkey

Not waving but drowning

It’s not often one gets a paper on uncertainty in estimates of ocean heat content written by a clarinettist whose wikipedia page has a section on their extra curricular activities that goes &…

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Open post
John Kennedy @micefearboggis@fediscience.org
· 7mo ago

A small update to my long and unjustifiably profane blog post on the rollercoaster that is global temperature and the interpretations of its wrigglin' innards.

ENSO is coming

https://diagrammonkey.wordpress.com/2025/07/04/an-egregious-encomium-or-execration-of-the-evanescent-ephemeral-and-effervescent-made-eternal-and-enduring-through-the-excretions-of-an-eejit/#:~:text=the%20broader%20discourse.-,2026%2D03%2D06,-%3A%20I%20should%20probably

An egregious encomium or execration of the evanescent, ephemeral, and effervescent made eternal and enduring through the excretions of an eejit
Diagram Monkey

An egregious encomium or execration of the evanescent, ephemeral, and effervescent made eternal and enduring through the excretions of an eejit

Part VI of my alliterative and rambling notes on a minor anomaly. Part I – A multitude of possibly unsatisfying answers Part II – A panoply of trifling dissatisfactions Part III –&nb…

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Open post
John Kennedy @micefearboggis@fediscience.org
· 7mo ago

Q. What do CGI cigarette butts and global temperature estimates have in common?

A. Verisimilitude.

https://diagrammonkey.wordpress.com/2026/03/03/verisimilitude/

diagrammonkey.wordpress.com
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Open post
John Kennedy @micefearboggis@fediscience.org
· 7mo ago

RE: @micefearboggis@fediscience.org

Re-up for the Monday morning crowds.

fediscience.org
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Open post
John Kennedy @micefearboggis@fediscience.org
· 6mo ago
Replying to
@SusiArnott You're welcome a million.
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John Kennedy @micefearboggis@fediscience.org
· 9mo ago
Replying to
@hellomiakoda@pdx.social Yeah, me too.
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