Leon Simons
@leonsimons.bsky.social
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
No, these are anomalies
November 10, 2025 at 4:01 PM
No, these are anomalies
The inadvertent aerosol experiment of shipping desulphurization helps to reduce the largest uncertainty in climate science.
This contributes to the evidence of a much higher climate sensitivity, which means carbon budgets are lower and that we need much faster mitigation
bsky.app/profile/leon...
This contributes to the evidence of a much higher climate sensitivity, which means carbon budgets are lower and that we need much faster mitigation
bsky.app/profile/leon...
If @drjamesehansen.bsky.social at all. (2025, mainly based on NASA CERES observations) is correct about the very strong shipping SOx forcing, the climate is more sensitive to anthropogenic forcings (incl both GHGs and aerosols).
Which e.g. means we need much faster mitigation and adaptation.
Which e.g. means we need much faster mitigation and adaptation.
November 10, 2025 at 3:21 PM
The inadvertent aerosol experiment of shipping desulphurization helps to reduce the largest uncertainty in climate science.
This contributes to the evidence of a much higher climate sensitivity, which means carbon budgets are lower and that we need much faster mitigation
bsky.app/profile/leon...
This contributes to the evidence of a much higher climate sensitivity, which means carbon budgets are lower and that we need much faster mitigation
bsky.app/profile/leon...
If @drjamesehansen.bsky.social at all. (2025, mainly based on NASA CERES observations) is correct about the very strong shipping SOx forcing, the climate is more sensitive to anthropogenic forcings (incl both GHGs and aerosols).
Which e.g. means we need much faster mitigation and adaptation.
Which e.g. means we need much faster mitigation and adaptation.
November 10, 2025 at 3:14 PM
If @drjamesehansen.bsky.social at all. (2025, mainly based on NASA CERES observations) is correct about the very strong shipping SOx forcing, the climate is more sensitive to anthropogenic forcings (incl both GHGs and aerosols).
Which e.g. means we need much faster mitigation and adaptation.
Which e.g. means we need much faster mitigation and adaptation.
Reposted by Leon Simons
Well a) don't denigrate it as a factoid; it is well established (see eg acp.copernicus.org/articles/24/...)
b) appreciate that in general albedo change is currently accelerating warming, and that regardless of any specific policy responses this is something people need to understand
b) appreciate that in general albedo change is currently accelerating warming, and that regardless of any specific policy responses this is something people need to understand
Warming effects of reduced sulfur emissions from shipping
Abstract. The regulation introduced in 2020 that limits the sulfur content in shipping fuel has reduced sulfur emissions over global open oceans by about 80 %. This is expected to have reduced aerosol...
acp.copernicus.org
November 10, 2025 at 10:19 AM
Well a) don't denigrate it as a factoid; it is well established (see eg acp.copernicus.org/articles/24/...)
b) appreciate that in general albedo change is currently accelerating warming, and that regardless of any specific policy responses this is something people need to understand
b) appreciate that in general albedo change is currently accelerating warming, and that regardless of any specific policy responses this is something people need to understand
Many use the word exponential without knowing what it actually means.
One thing that does increase exponentially is the amount of water the air can hold with every degree Celsius (+7%) of temperature increase.
This leads to both more (extreme) evaporation and precipitation.
One thing that does increase exponentially is the amount of water the air can hold with every degree Celsius (+7%) of temperature increase.
This leads to both more (extreme) evaporation and precipitation.
November 10, 2025 at 2:08 AM
2016 was curious in many ways
November 10, 2025 at 1:51 AM
2016 was curious in many ways
When are you calling the annual maximum?
November 8, 2025 at 11:46 PM
When are you calling the annual maximum?
Same graph for the tropics.
Make your own here (I plotted @ecmwf.int ERA5 Sea Surface Temperatures for November-October here):
climatereanalyzer.org/research_too...
Make your own here (I plotted @ecmwf.int ERA5 Sea Surface Temperatures for November-October here):
climatereanalyzer.org/research_too...
November 8, 2025 at 11:12 PM
Same graph for the tropics.
Make your own here (I plotted @ecmwf.int ERA5 Sea Surface Temperatures for November-October here):
climatereanalyzer.org/research_too...
Make your own here (I plotted @ecmwf.int ERA5 Sea Surface Temperatures for November-October here):
climatereanalyzer.org/research_too...
Note the different y-axes.
The Northern Hemisphere ocean surface has warmed much more than the Southern Hemisphere.
The Northern Hemisphere ocean surface has warmed much more than the Southern Hemisphere.
November 8, 2025 at 11:06 PM
Note the different y-axes.
The Northern Hemisphere ocean surface has warmed much more than the Southern Hemisphere.
The Northern Hemisphere ocean surface has warmed much more than the Southern Hemisphere.
Has anyone already pointed out that the Northern Hemisphere mid latitude oceans are cooling? 🤦♂️
November 8, 2025 at 3:39 PM
Has anyone already pointed out that the Northern Hemisphere mid latitude oceans are cooling? 🤦♂️
This Dutch solar boom has led to negative electricity prices during most sunny summer days.
The grid can't cope and it's nearly impossible to get a new grid connection in most parts of the country.
The grid can't cope and it's nearly impossible to get a new grid connection in most parts of the country.
November 8, 2025 at 11:36 AM
This Dutch solar boom has led to negative electricity prices during most sunny summer days.
The grid can't cope and it's nearly impossible to get a new grid connection in most parts of the country.
The grid can't cope and it's nearly impossible to get a new grid connection in most parts of the country.
Thanks. I should upload these to Research Gate too and publish the numbers on GitHub.
www.researchgate.net/profile/Leon...
www.researchgate.net/profile/Leon...
Leon SIMONS | Dutch Chapter | Research profile
Leon SIMONS | Cited by 764 | | Read 17 publications | Contact Leon SIMONS
www.researchgate.net
November 8, 2025 at 10:54 AM
Thanks. I should upload these to Research Gate too and publish the numbers on GitHub.
www.researchgate.net/profile/Leon...
www.researchgate.net/profile/Leon...
Not posting all the conspiracy BS that followed, for obvious reasons.
He's afraid of the next ice age from intentional cooling by the Pentagon or something.
We won't see an ice age any time soon:
He's afraid of the next ice age from intentional cooling by the Pentagon or something.
We won't see an ice age any time soon:
November 7, 2025 at 8:36 PM
Not posting all the conspiracy BS that followed, for obvious reasons.
He's afraid of the next ice age from intentional cooling by the Pentagon or something.
We won't see an ice age any time soon:
He's afraid of the next ice age from intentional cooling by the Pentagon or something.
We won't see an ice age any time soon: