Leon Simons
@leonsimons.com
Mission: To understand & protect the home planet.
Innovator, climate research & communication, social entrepreneur.
Board member Club of Rome NL
Innovator, climate research & communication, social entrepreneur.
Board member Club of Rome NL
Pinned
Leon Simons
@leonsimons.com
· Jun 6
No one should be surprised when a planet that accumulates heat more than twice as fast starts to see temperatures go up more than twice as fast.
This isn't rocket science, but we do need more of these NASA satellites. 🌍🛰
To keep us from going blind.
bsky.app/profile/leon...
This isn't rocket science, but we do need more of these NASA satellites. 🌍🛰
To keep us from going blind.
bsky.app/profile/leon...
Another insightful visualization of when we could reach daily, monthly and annual temperature marks if the warming acceleration continues (not a prediction, but not impossible either).
Rees is great a putting a lot of information on a (relatively) comprehensible single graph!
Rees is great a putting a lot of information on a (relatively) comprehensible single graph!
January 28, 2026 at 8:46 AM
Another insightful visualization of when we could reach daily, monthly and annual temperature marks if the warming acceleration continues (not a prediction, but not impossible either).
Rees is great a putting a lot of information on a (relatively) comprehensible single graph!
Rees is great a putting a lot of information on a (relatively) comprehensible single graph!
Who can help @nickoldridge.bsky.social out to find the best comedian for the job?
@yellowdotstudios.bsky.social
@ghostpanther.bsky.social
@yellowdotstudios.bsky.social
@ghostpanther.bsky.social
January 26, 2026 at 3:08 PM
Who can help @nickoldridge.bsky.social out to find the best comedian for the job?
@yellowdotstudios.bsky.social
@ghostpanther.bsky.social
@yellowdotstudios.bsky.social
@ghostpanther.bsky.social
Science vs. Economics on Climate Change
YouTube video by Climate Chat
www.youtube.com
January 25, 2026 at 6:01 PM
Reposted by Leon Simons
Sunday 1/25 at 10am PT on Climate Chat: "Science vs. Economics on Climate Change" with host Dan Miller.
#ClimateChange #Economics #GlobalWarming
@leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social
youtube.com/live/VK5aYGc...
#ClimateChange #Economics #GlobalWarming
@leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social
youtube.com/live/VK5aYGc...
Science vs. Economics on Climate Change
YouTube video by Climate Chat
youtube.com
January 25, 2026 at 2:18 AM
Sunday 1/25 at 10am PT on Climate Chat: "Science vs. Economics on Climate Change" with host Dan Miller.
#ClimateChange #Economics #GlobalWarming
@leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social
youtube.com/live/VK5aYGc...
#ClimateChange #Economics #GlobalWarming
@leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social
youtube.com/live/VK5aYGc...
As Earth's axis is tilted, Northern Hemisphere winters still happen.
And weather is still varies.
And idiots still use cold weather to deny climate change.
And weather is still varies.
And idiots still use cold weather to deny climate change.
I got a request from a reporter about Trump's statement that "what happened to global warming?" w.r.t. the cold event covering much of the U.S. this weekend. Here is my reply.
January 24, 2026 at 4:22 PM
As Earth's axis is tilted, Northern Hemisphere winters still happen.
And weather is still varies.
And idiots still use cold weather to deny climate change.
And weather is still varies.
And idiots still use cold weather to deny climate change.
Same region since 1854.
Global average temperatures don't show the regional extreme rates of warming.
Global average temperatures don't show the regional extreme rates of warming.
January 23, 2026 at 10:48 PM
Same region since 1854.
Global average temperatures don't show the regional extreme rates of warming.
Global average temperatures don't show the regional extreme rates of warming.
Reposted by Leon Simons
I've attended many climate COPs over the years and it seems some nations... *cough* ...are very well versed indeed in this now-declassified "Simple Sabotage Field Manual" first issued by the CIA in 1944
January 23, 2026 at 1:09 PM
I've attended many climate COPs over the years and it seems some nations... *cough* ...are very well versed indeed in this now-declassified "Simple Sabotage Field Manual" first issued by the CIA in 1944
Sea Surface Temperature around Europe were record high again in 2025.
No one can (falsely) blame El Niño for this.
No one can (falsely) blame El Niño for this.
January 23, 2026 at 1:20 PM
Sea Surface Temperature around Europe were record high again in 2025.
No one can (falsely) blame El Niño for this.
No one can (falsely) blame El Niño for this.
Reposted by Leon Simons
The reality of escalating extreme weather as we start 2026: Meteorologist @climatechris.bsky.social breaks it down.
Serious question: Do you accept that this is happening?
Serious question: Do you accept that this is happening?
January 21, 2026 at 9:47 PM
The reality of escalating extreme weather as we start 2026: Meteorologist @climatechris.bsky.social breaks it down.
Serious question: Do you accept that this is happening?
Serious question: Do you accept that this is happening?
"China has no wind farms"
January 21, 2026 at 2:14 PM
"China has no wind farms"
'Optimism bias & climate change' is now streaming live.
Pre-recorded for a change.
Please share and comment:
youtu.be/XYb1T2-RmlQ
Pre-recorded for a change.
Please share and comment:
youtu.be/XYb1T2-RmlQ
Optimism Bias & Climate Change
YouTube video by Climate Chat
youtu.be
January 18, 2026 at 6:00 PM
'Optimism bias & climate change' is now streaming live.
Pre-recorded for a change.
Please share and comment:
youtu.be/XYb1T2-RmlQ
Pre-recorded for a change.
Please share and comment:
youtu.be/XYb1T2-RmlQ
A crazy amount of heat has accumulated in the Equatorial Pacific Ocean over the past two months.
Hold on to your hats when this reaches the surface with the next El Niño.
Y-axis shows depth, X-axis shows degree longitude (one degree equals 111 km) and colors temp anomalies.
@noaa.gov PMEL data
Hold on to your hats when this reaches the surface with the next El Niño.
Y-axis shows depth, X-axis shows degree longitude (one degree equals 111 km) and colors temp anomalies.
@noaa.gov PMEL data
January 17, 2026 at 4:10 PM
A crazy amount of heat has accumulated in the Equatorial Pacific Ocean over the past two months.
Hold on to your hats when this reaches the surface with the next El Niño.
Y-axis shows depth, X-axis shows degree longitude (one degree equals 111 km) and colors temp anomalies.
@noaa.gov PMEL data
Hold on to your hats when this reaches the surface with the next El Niño.
Y-axis shows depth, X-axis shows degree longitude (one degree equals 111 km) and colors temp anomalies.
@noaa.gov PMEL data
Reposted by Leon Simons
55 years ago. The US introducing significantly strongly regulations on air pollution led to big changes in the cement industry. This from the 1970 minerals yearbook.
January 17, 2026 at 8:15 AM
55 years ago. The US introducing significantly strongly regulations on air pollution led to big changes in the cement industry. This from the 1970 minerals yearbook.
Reposted by Leon Simons
Sunday 1/18 at 10am PT on Climate Chat: "Optimism Bias & Climate Change" (prerecorded). How optimism bias of those who believe in climate change leads to inaction.
@leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social
#ClimateCrisis #psychology
youtu.be/XYb1T2-RmlQ
@leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social
#ClimateCrisis #psychology
youtu.be/XYb1T2-RmlQ
Optimism Bias & Climate Change
YouTube video by Climate Chat
youtu.be
January 16, 2026 at 12:28 PM
Sunday 1/18 at 10am PT on Climate Chat: "Optimism Bias & Climate Change" (prerecorded). How optimism bias of those who believe in climate change leads to inaction.
@leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social
#ClimateCrisis #psychology
youtu.be/XYb1T2-RmlQ
@leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social
#ClimateCrisis #psychology
youtu.be/XYb1T2-RmlQ
Earth's Energy Imbalance was over 10 Hiroshima bombs per second for the 4-year running average (showing less variability) too..
This rate of global heat uptake is impossible for us tiny humans to fathom.
This rate of global heat uptake is impossible for us tiny humans to fathom.
January 15, 2026 at 5:17 PM
Earth's Energy Imbalance was over 10 Hiroshima bombs per second for the 4-year running average (showing less variability) too..
This rate of global heat uptake is impossible for us tiny humans to fathom.
This rate of global heat uptake is impossible for us tiny humans to fathom.
"How do you sleep at night?!"
www.patreon.com/posts/148296...
www.patreon.com/posts/148296...
"How do you sleep at night?!" | Leon Simons
Get more from Leon Simons on Patreon
www.patreon.com
January 15, 2026 at 5:09 PM
"How do you sleep at night?!"
www.patreon.com/posts/148296...
www.patreon.com/posts/148296...
Reposted by Leon Simons
As the first sentence of the paper mentions, it's due to increased greenhouse gas emissions and decreasing aerosols, which leads to a faster net forcing increase and therefore acceleration (= mainly faster Ocean Heat Uptake).
Are we vindicated now?
bsky.app/profile/leon...
Are we vindicated now?
bsky.app/profile/leon...
Ocean Heat Content Sets Another Record in 2025
'Global ocean warming continued unabated in 2025 in response to increased greenhouse gas concentrations and recent reductions in sulfate aerosols'
I'm hoping this preliminary @mercatorocean.bsky.social estimate for 2025 is wrong...🫣
'Global ocean warming continued unabated in 2025 in response to increased greenhouse gas concentrations and recent reductions in sulfate aerosols'
I'm hoping this preliminary @mercatorocean.bsky.social estimate for 2025 is wrong...🫣
January 15, 2026 at 11:24 AM
As the first sentence of the paper mentions, it's due to increased greenhouse gas emissions and decreasing aerosols, which leads to a faster net forcing increase and therefore acceleration (= mainly faster Ocean Heat Uptake).
Are we vindicated now?
bsky.app/profile/leon...
Are we vindicated now?
bsky.app/profile/leon...
The 1991-2020 climate doesn't exist anymore 😟
January 14, 2026 at 7:48 PM
The 1991-2020 climate doesn't exist anymore 😟
Reposted by Leon Simons
- 1 day until we release the Global Climate Highlights 2025. Get ready to explore critical data on last year's global and regional temperatures, sea ice extent and more.
#CopernicusClimate #CopernicusAtmosphere #GCH2025
#CopernicusClimate #CopernicusAtmosphere #GCH2025
January 13, 2026 at 11:31 AM
- 1 day until we release the Global Climate Highlights 2025. Get ready to explore critical data on last year's global and regional temperatures, sea ice extent and more.
#CopernicusClimate #CopernicusAtmosphere #GCH2025
#CopernicusClimate #CopernicusAtmosphere #GCH2025
Listening back to speeches by Bush Sr from June 1989 and Bush Jr from June 2001, they sound remarkably clear and coherent, compared to the current president of United States (and compared to the previous one..)
Here both Bushes speak about sulfur:
Here both Bushes speak about sulfur:
January 12, 2026 at 11:33 PM
Listening back to speeches by Bush Sr from June 1989 and Bush Jr from June 2001, they sound remarkably clear and coherent, compared to the current president of United States (and compared to the previous one..)
Here both Bushes speak about sulfur:
Here both Bushes speak about sulfur:
Reposted by Leon Simons
Rememeber, what happens in the North Pacific Ocean doesn't stay in the North Pacific Ocean:
January 10, 2026 at 6:45 PM
Rememeber, what happens in the North Pacific Ocean doesn't stay in the North Pacific Ocean:
Starting soon!
www.youtube.com/live/zmllNBR...
www.youtube.com/live/zmllNBR...
January 11, 2026 at 5:44 PM
Starting soon!
www.youtube.com/live/zmllNBR...
www.youtube.com/live/zmllNBR...
Reposted by Leon Simons
The first holidays and new year without parents and grandparents are hard.
It helps me to ponder over generations.
What did their world look like?
What energy did they use?
What changed during their lifetimes?
What didn't?
Tomorrow I'll reflect on this during Climate Chat. 👇
It helps me to ponder over generations.
What did their world look like?
What energy did they use?
What changed during their lifetimes?
What didn't?
Tomorrow I'll reflect on this during Climate Chat. 👇
January 10, 2026 at 9:10 PM
The first holidays and new year without parents and grandparents are hard.
It helps me to ponder over generations.
What did their world look like?
What energy did they use?
What changed during their lifetimes?
What didn't?
Tomorrow I'll reflect on this during Climate Chat. 👇
It helps me to ponder over generations.
What did their world look like?
What energy did they use?
What changed during their lifetimes?
What didn't?
Tomorrow I'll reflect on this during Climate Chat. 👇
The first holidays and new year without parents and grandparents are hard.
It helps me to ponder over generations.
What did their world look like?
What energy did they use?
What changed during their lifetimes?
What didn't?
Tomorrow I'll reflect on this during Climate Chat. 👇
It helps me to ponder over generations.
What did their world look like?
What energy did they use?
What changed during their lifetimes?
What didn't?
Tomorrow I'll reflect on this during Climate Chat. 👇
January 10, 2026 at 9:10 PM
The first holidays and new year without parents and grandparents are hard.
It helps me to ponder over generations.
What did their world look like?
What energy did they use?
What changed during their lifetimes?
What didn't?
Tomorrow I'll reflect on this during Climate Chat. 👇
It helps me to ponder over generations.
What did their world look like?
What energy did they use?
What changed during their lifetimes?
What didn't?
Tomorrow I'll reflect on this during Climate Chat. 👇
In a sane world, this would be front page news everywhere.
But it will hardly be covered anywhere.
The North Pacific Ocean surface warmed over twice as much over the past 15 years than it did over the preceding 156 years.
That's an increase in warming rate of >2000%!
But it will hardly be covered anywhere.
The North Pacific Ocean surface warmed over twice as much over the past 15 years than it did over the preceding 156 years.
That's an increase in warming rate of >2000%!
January 10, 2026 at 1:57 PM
In a sane world, this would be front page news everywhere.
But it will hardly be covered anywhere.
The North Pacific Ocean surface warmed over twice as much over the past 15 years than it did over the preceding 156 years.
That's an increase in warming rate of >2000%!
But it will hardly be covered anywhere.
The North Pacific Ocean surface warmed over twice as much over the past 15 years than it did over the preceding 156 years.
That's an increase in warming rate of >2000%!