John Kennedy
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micefearboggis.bsky.social
John Kennedy
@micefearboggis.bsky.social
3.2K followers 3.1K following 1.9K posts
Occasional climate scientist, diagram monkey, probabilistic historian, science anti-communicator. All views and opinions are my own. This is not, sadly, a promise of novelty: it’s a disclaimer. He/him. https://www.jkclimate.fr/
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micefearboggis.bsky.social
Climate indicators - Ocean heat content
Graph of ocean heat content. White lines on a shaded background that's green at the top and purple at the bottom. The uncertainty range is shown as a mauve shaded area.
November 11, 2025 at 3:56 PM
micefearboggis.bsky.social
Climate indicators - Arctic sea ice extent
Graph of Arctic sea-ice extent 1979-2025, white lines on a blueprint blue background.
November 11, 2025 at 3:56 PM
micefearboggis.bsky.social
Climate indicators - Carbon dioxide
Graph of carbon dioxide atmospheric concentration. The background is a gradient that runs from green at the top through yellow to orange at the bottom. The line of the graph has a gradient going the other way.
November 11, 2025 at 3:56 PM
micefearboggis.bsky.social
Climate indicators - Global mean temperature
Graph of global mean temperature. White lines on a charcoal grey background with a very slight dark to light gradient from top to bottom.
November 11, 2025 at 3:56 PM
micefearboggis.bsky.social
Monthly climate dashboard

Now with all global temperature datasets updated to September or October.

www.jkclimate.fr/MonthlyDashb...
Graph showing the ranking for monthly global mean temperature from six data sets between February 2023 and October 2025. Rankings are shown as coloured squares. Red is warmest on record (for that month and dataset), orange is second warmest, deep yellow (a beautiful shade that I w
November 11, 2025 at 8:50 AM
micefearboggis.bsky.social
Antarctic sea ice extent remains low after the maximum of the seasonal cycle in September (3rd lowest on record).

Slow growth of Arctic sea ice in the past few days has left Arctic sea ice extent at a near-record low for the time of year.
Graph showing daily Antarctic sea ice extent through the year from 1978 to 2025. The 1991-2020 average is shown as a thick dark grey line. 2025 is shown as a dark blue line. Every other year is shown as a thin grey line. Data are from JAXA Graph showing daily Arctic sea ice extent through the year from 1978 to 2025. The 1991-2020 average is shown as a thick dark grey line. 2025 is shown as a dark blue line. Every other year is shown as a thin grey line. Data are from JAXA
November 7, 2025 at 12:03 PM
micefearboggis.bsky.social
September and October were warm enough to nudge the year-to-date average global temp up after a slow fall from the record warm January. 2025 remains on course to be the second or third warmest year on record though given how close it is, it might end up a split decision.
Graph showing year-to-date average global mean temperature anomalies from 1850 (in varying shades of yellow, green then dark blue with colours getting darker over time) to 2025 (shown in red). Data are from six data sets: HadCRUT5, NOAAGlobalTemp v6, GISTEMP, Berkeley Earth, JRA-3Q and ERA5. The latest month shown is October 2025 though most datasets currently end in September.
November 7, 2025 at 12:03 PM
micefearboggis.bsky.social
October continues the run of months that exceed anything seen in the observed record before June 2023. The only exception was February 2025. The warmest, second warmest, and now third warmest Octobers were 2023, 2024 and 2025.
Graph showing the ranking for monthly global mean temperature from six data sets between February 2023 and October 2025. Rankings are shown as coloured squares. Red is warmest on record (for that month and dataset), orange is second warmest, deep yellow (a beautiful shade that I want to call cadmium yellow but it's not toxic) means a top five month and pale yellow (the colour of sun-faded straw) is top ten. Nothing is outside that range. Every single warmest month in all datasets happened since July 2023. Global monthly mean temperature anomalies (relative to the 1981-2010 average) for the period October 1850 to October 2025. Only Octobers are shown. Data are from seven datasets: HadCRUT5, NOAAGlobalTemp, GISTEMP, Berkeley Earth (the old version and the new high resolution experimental version), JRA-3Q and ERA5.
November 7, 2025 at 12:03 PM
micefearboggis.bsky.social
Monthly global temperature anomalies increased in October (in ERA5 at least). Yesterday, I was asked whether the brewing La Nina would lead to a drop in global temperature. It might yet, but global temperature typically lags changes in the tropical Pacific.
Monthly global mean temperature anomalies (relative to the 1981-2010 average) for the period 2014 to 2025. Data from seven datasets.
November 7, 2025 at 12:03 PM
micefearboggis.bsky.social
Quasi monthly update of the monthly climate dashboard

Update with:
• preliminary October data
• smaller files for faster loading
• bug fix for overlong plot titles

Some things to look out for, a short 🧵

www.jkclimate.fr/MonthlyDashb...
Graph showing the ranking for monthly global mean temperature from six data sets between February 2023 and October 2025. Rankings are shown as coloured squares. Red is warmest on record (for that month and dataset), orange is second warmest, deep yellow (a beautiful shade that I want to call cadmium yellow but it's not toxic) means a top five month and pale yellow (the colour of sun-faded straw) is top ten. Nothing is outside that range. Every single warmest month in all datasets happened since July 2023.
November 7, 2025 at 12:03 PM
micefearboggis.bsky.social
Poets. Linocut on recycled paper.
Linocut of W H Auden looking wrinkled as. Black ink on whitish paper. Linocut of Ted Hughes looking intense. Green ink on white paper.
November 6, 2025 at 10:26 PM
micefearboggis.bsky.social
Till even eternal mountains fall and crumble to dust. So shall it shall be written, so it shall be done.
Purple graph of glacier mass balance from 1950
November 1, 2025 at 5:24 AM
micefearboggis.bsky.social
Even unto the dark and icy heart of the Arctic, where ice smothers the ocean shall it be felt, unlocking millennia old secrets from time’s cold grasp
Orange graph of arctic sea ice extent from 1978
November 1, 2025 at 5:22 AM
micefearboggis.bsky.social
And the seas shall boil till all life perishes and the fishers’ nets shall be empty
Red graph of marine heatwave since 1983
November 1, 2025 at 5:20 AM
micefearboggis.bsky.social
And the seas rise up in an implacable tide and take the land, sowing fertile land with salt and drowning those in desperate storm wracked night.
Yellow graph of global mean sea level from 1993
November 1, 2025 at 5:16 AM
micefearboggis.bsky.social
Until even the whale haunted depths of the icy oceans heart are warmed by hells fire.
Green graph of ocean heat content from 1960
November 1, 2025 at 5:14 AM
micefearboggis.bsky.social
And its breath shall make the air burn like a furnace that shimmers and scorches all that it reaches and that to every corner of the earth
Orange graph of global temperature from 1850
November 1, 2025 at 5:11 AM
micefearboggis.bsky.social
For the air shall reek and be sour like the exhalation of a great beast
Purple graph showing atmospheric carbon dioxide concentrations in the atmosphere from 1984
November 1, 2025 at 5:08 AM
micefearboggis.bsky.social
Globally, September 2025 was another very warm month. Early indications (based on 1-29 October in ERA5) are that October was also very warm.
Global monthly mean temperature anomalies (relative to the 1981-2010 average) for the period September 1850 to September 2025. Only Septembers are shown. Data are from seven datasets: HadCRUT5, NOAAGlobalTemp, GISTEMP, Berkeley Earth (the old version and the new high resolution experimental version), JRA-3Q and ERA5. Monthly global mean temperature anomalies (relative to the 1981-2010 average) for the period 2014 to 2025. Data from seven datasets.
October 31, 2025 at 1:33 PM
micefearboggis.bsky.social
Quasi monthly update of the monthly climate dashboard

This includes the last September updates that we are likely to get until the end of the US government shutdown.

www.jkclimate.fr/MonthlyDashb...
Graph showing the ranking for monthly global mean temperature from six data sets between February 2023 and September 2025. Rankings are shown as coloured squares. Red is warmest on record (for that month and dataset), orange is second warmest, deep yellow (a beautiful shade that I want to call cadmium yellow but it's not toxic) means a top five month and pale yellow (the colour of sun-faded straw) is top ten. Nothing is outside that range. Every single warmest month in all datasets happened since July 2023. Graph showing monthly global mean temperature anomalies from 1850 (in varying shades of yellow, green then dark blue with colours getting darker over time) to 2025 (shown in red). Data are from six data sets: HadCRUT5, NOAAGlobalTemp v6, GISTEMP, Berkeley Earth, JRA-3Q and ERA5. The latest month shown is September 2025.
October 31, 2025 at 1:33 PM
micefearboggis.bsky.social
The flying monkeys are getting a lot - I mean, a lot - of exercise this autumn.
A linocut of that scene from the Wizard of Oz where the Wicked Witch of the West releases the flying monkeys and commands them to "Fly, fly!". The witch is silhouetted against a panorama of sky and mountains. The sky is filled with flying monkeys. Green ink on white paper with the words Fly Fly printed over in black ink.
October 30, 2025 at 9:05 AM
micefearboggis.bsky.social
QRP with your skull #art
Linocut of a skull staring off to the right. Black ink on pink card. Cute, depending how you feel about skulls. Linocut of a hooded and robed skeleton carrying a scythe and riding on the back of a skeletal horse. In the background a starry sky, a desert. Black ink on blue and red marbled paper.
October 28, 2025 at 10:44 PM
micefearboggis.bsky.social
Sully from Monsters Inc. The other half of the duo...
A linocut of a small spherical green monster with a single eye and a toothy grin. He's waving with one hand and the other hand is a clenched fist that far from suggesting violence gives the character a certain get-up-and-go vigour. He looks a lot like Mike Wazowski.
October 28, 2025 at 6:54 AM
micefearboggis.bsky.social
A Halloweeny linocut. Incomplete, but I think I like it as is.
linogravure of Sully from Monsters Inc roaring. If you don't know Sully, he's a big furry monster with big claws, big teeth and a heavy brow all of which can be seen in the image. The big teeth are bared in a gape-mouthed roar and the big claws are being brandished as if he's reaching out to grab you. The brow sits heavily above a piercing gaze. Green-blue ink on white paper.
October 27, 2025 at 10:48 PM
micefearboggis.bsky.social
Quasi monthly update of the monthly climate dashboard

The first September updates are starting to come in. Globally another very warm month.

www.jkclimate.fr/MonthlyDashb...
Graph showing monthly global mean temperature anomalies from 1850 (in varying shades of yellow, green then dark blue with colours getting darker over time) to 2025 (shown in red). Data are from six data sets: HadCRUT5, NOAAGlobalTemp v5, GISTEMP, Berkeley Earth, JRA-3Q and ERA5. The latest month shown is September 2025. Graph showing the ranking for monthly global mean temperature from six data sets between February 2023 and September 2025. Rankings are shown as coloured squares. Red is warmest on record (for that month and dataset), orange is second warmest, deep yellow (a beautiful shade that I want to call cadmium yellow but it's not toxic) means a top five month and pale yellow (the colour of sun-faded straw) is top ten. Nothing is outside that range. Every single warmest month in all datasets happened since July 2023.
October 10, 2025 at 12:05 PM