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Leon Simons 🌍

@LeonSimons8 • 42,184 subscribers

Host of Climate Chat | Plain climate science & DATAVIZ | Mission: To Understand and Protect the Home Planet

Shorts

Tipping Point from the Stable Climate at ~280 ppm CO₂ (Holocene, during past 10,000 years) to a Stable Hothouse Climate at 560 ppm CO₂. We already at 560 ppm CO₂ equivalent and will likely hot (and pass) 560 ppm CO₂ later this century. Simplified graph, adapted from KNMI.

Tipping Point from the Stable Climate at ~280 ppm CO₂ (Holocene, during past 10,000 years) to a Stable Hothouse Climate at 560 ppm CO₂. We already at 560 ppm CO₂ equivalent and will likely hot (and pass) 560 ppm CO₂ later this century. Simplified graph, adapted from KNMI.

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The next two years will make the 2023-2024 El Niño look like a walk in the park. We'll get a first glance into how resilient humanity is to a post ΔT +1.5°C world.

The next two years will make the 2023-2024 El Niño look like a walk in the park. We'll get a first glance into how resilient humanity is to a post ΔT +1.5°C world.

37,793 Aufrufe

🌀 💪📈 Category 5 Hurricane Melissa rapidly intensificatied with the power of about 500 TW (terawatt, 500*10¹² joules per second). For comparison, that's 25 times humanity's average global energy use of 20 TW. Earth's Energy Imbalance is about +700 TW 🤯

🌀 💪📈 Category 5 Hurricane Melissa rapidly intensificatied with the power of about 500 TW (terawatt, 500*10¹² joules per second). For comparison, that's 25 times humanity's average global energy use of 20 TW. Earth's Energy Imbalance is about +700 TW 🤯

38,295 Aufrufe

For those needing a reminder that 365 days of continuous record shattering of an ocean area covering 40 million square kilometers doesn't usually happen, see this:

For those needing a reminder that 365 days of continuous record shattering of an ocean area covering 40 million square kilometers doesn't usually happen, see this:

91,237 Aufrufe

Watch until the end. This is an ocean area of about 40 million square kilometers. It takes >3000 times as much heat to warm water than it does for the same volume of air! The North Atlantic Sea Surface Temperature Anomaly: 🌊🌡📈

Watch until the end. This is an ocean area of about 40 million square kilometers. It takes >3000 times as much heat to warm water than it does for the same volume of air! The North Atlantic Sea Surface Temperature Anomaly: 🌊🌡📈

58,429 Aufrufe

Pieter Omtzigt Onvoorstelbaar dat zo veel mensen op zo'n labiele vent hebben gestemd. Je helpt alles naar de kloten, gaat op vakantie, komt terug om te zeggen dat we ons moeten voortplanten om de omvolking tegen te gaan en houdt het dan weer voor gezien.

Pieter Omtzigt Onvoorstelbaar dat zo veel mensen op zo'n labiele vent hebben gestemd. Je helpt alles naar de kloten, gaat op vakantie, komt terug om te zeggen dat we ons moeten voortplanten om de omvolking tegen te gaan en houdt het dan weer voor gezien.

24,541 Aufrufe

Posting on climate Twitter in 2025

Posting on climate Twitter in 2025

12,948 Aufrufe

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"This can't be" "This can't be true" "Acapulco has been destroyed"

"This can't be" "This can't be true" "Acapulco has been destroyed"

Leon Simons 🌍

2,557,420 Aufrufe • vor 2 Jahren

It's been quite something to see one of the world's leading climate scientists, James Hansen, being vilified the past six years for presenting data showing the rapid acceleration of global and regional warming, associated with continued greenhouse gas emissions and rapid reduction of (dimming) particulate air pollution. Loud voices in the climate community ignore the actual science and constantly use cherry-picking, strawmann arguments and ad hominems to try and deny the undeniable. Pretending that we have been exaggerating, while it's likely even worse than we feared (again, based on data). False hope and vested interests will get a lot of people killed, as it has for centuries.

It's been quite something to see one of the world's leading climate scientists, James Hansen, being vilified the past six years for presenting data showing the rapid acceleration of global and regional warming, associated with continued greenhouse gas emissions and rapid reduction of (dimming) particulate air pollution. Loud voices in the climate community ignore the actual science and constantly use cherry-picking, strawmann arguments and ad hominems to try and deny the undeniable. Pretending that we have been exaggerating, while it's likely even worse than we feared (again, based on data). False hope and vested interests will get a lot of people killed, as it has for centuries.

Leon Simons 🌍

476,758 Aufrufe • vor 6 Monaten

Today I was asked why I don't join in blocking traffic to demand more climate action, knowing what I know. I just don't feel like I could compete with this:

Today I was asked why I don't join in blocking traffic to demand more climate action, knowing what I know. I just don't feel like I could compete with this:

Leon Simons 🌍

1,218,225 Aufrufe • vor 2 Jahren

❄️🏂⛷️ People in Europe enjoying winter.

❄️🏂⛷️ People in Europe enjoying winter.

Leon Simons 🌍

750,838 Aufrufe • vor 2 Jahren

Parts of Vietnam received a record 1,730 liters of rain per square meter in 24 hours 🤯

Parts of Vietnam received a record 1,730 liters of rain per square meter in 24 hours 🤯

Leon Simons 🌍

148,662 Aufrufe • vor 7 Monaten

Have they tried punching or kicking the water? That works great with protesters. 🤦‍♂️

Have they tried punching or kicking the water? That works great with protesters. 🤦‍♂️

Leon Simons 🌍

442,436 Aufrufe • vor 2 Jahren

Global warming has accelerated. On Climate Chat we explain why, mainly with observation-based data:

Global warming has accelerated. On Climate Chat we explain why, mainly with observation-based data:

Leon Simons 🌍

62,615 Aufrufe • vor 3 Monaten

'You wanna hear something crazy?' Joe Rogan learned about our research. I have some notes:

'You wanna hear something crazy?' Joe Rogan learned about our research. I have some notes:

Leon Simons 🌍

87,230 Aufrufe • vor 7 Monaten

Every word of the title on the front page of de de Volkskrant newspaper was wrong! Q: Are you the UN climate panel (IPCC)?: A: "No, not at all, the journalist got this wrong" And somewhat lower emissions can still lead to very high warming and a "disaster scenario":

Every word of the title on the front page of de de Volkskrant newspaper was wrong! Q: Are you the UN climate panel (IPCC)?: A: "No, not at all, the journalist got this wrong" And somewhat lower emissions can still lead to very high warming and a "disaster scenario":

Leon Simons 🌍

12,139 Aufrufe • vor 21 Tagen

Tomorrow, everyone on Earth will get an equal amount of daylight and darkness. The amount of daylight doesn't change much for countries in the tropics. Another great visualization by Neil Kaye

Tomorrow, everyone on Earth will get an equal amount of daylight and darkness. The amount of daylight doesn't change much for countries in the tropics. Another great visualization by Neil Kaye

Leon Simons 🌍

116,039 Aufrufe • vor 1 Jahr

🚨 None of the United Nations IPCC models capture what NASA satellites are seeing. We should assume and prepare for the worst, as there is a non-zero chance of 3°C of global warming by 2050. We better assume that it will happen and/or try to make sure that it doesn't happen. 1/

🚨 None of the United Nations IPCC models capture what NASA satellites are seeing. We should assume and prepare for the worst, as there is a non-zero chance of 3°C of global warming by 2050. We better assume that it will happen and/or try to make sure that it doesn't happen. 1/

Leon Simons 🌍

52,410 Aufrufe • vor 7 Monaten

This fallacy that 'actions by our governments' will limit global warming to about 2.7°C is very dangerous. We could experience this level of warming already around 2050, based on real forcing (greenhouse gases and aerosols) changes and observations of Earth’s Energy Imbalance

This fallacy that 'actions by our governments' will limit global warming to about 2.7°C is very dangerous. We could experience this level of warming already around 2050, based on real forcing (greenhouse gases and aerosols) changes and observations of Earth’s Energy Imbalance

Leon Simons (looking up)

74,522 Aufrufe • vor 1 Jahr

ΔT +1.5°C🌡📈 I'm being asked to be more nice about addressing the fallacy that we are still a decade away from crossing 1.5°C. I'll just let the Mann himself explain how shifting baselines work:

ΔT +1.5°C🌡📈 I'm being asked to be more nice about addressing the fallacy that we are still a decade away from crossing 1.5°C. I'll just let the Mann himself explain how shifting baselines work:

Leon Simons 🌍

105,410 Aufrufe • vor 2 Jahren

This is what sea level rise will look like. Many will watch helplessly how their coast erodes. Increasing global sea level causes long term risks. Short term risks come from changing weather paters and more extreme events like stronger waves and storms.

This is what sea level rise will look like. Many will watch helplessly how their coast erodes. Increasing global sea level causes long term risks. Short term risks come from changing weather paters and more extreme events like stronger waves and storms.

Leon Simons 🌍

128,440 Aufrufe • vor 3 Jahren

This is such a great visualization of the carbon cycle and of how humanity has completely altered it within a geological instant:

This is such a great visualization of the carbon cycle and of how humanity has completely altered it within a geological instant:

Leon Simons 🌍

94,462 Aufrufe • vor 2 Jahren

We had a great Climate Chat about the temperatures of the past years, the causes, and about what's next, as warming has accelerated. Here I explain how 130,000 years of greenhouse gas and aerosol forcing impacted our climate. Using estimates from Global warming in the pipeline

We had a great Climate Chat about the temperatures of the past years, the causes, and about what's next, as warming has accelerated. Here I explain how 130,000 years of greenhouse gas and aerosol forcing impacted our climate. Using estimates from Global warming in the pipeline

Leon Simons (looking up)

53,510 Aufrufe • vor 1 Jahr

It's about oil. "It's easier to imagine the end of the world than the end of [oil fuelled] capitalism"

It's about oil. "It's easier to imagine the end of the world than the end of [oil fuelled] capitalism"

Leon Simons 🌍

11,471 Aufrufe • vor 5 Monaten

☀️🌍🔥📈 The real causes and effects of climate change summarized in 4.5 minutes! Top Canadian YouTuber Canadian Prepper did a great job summarizing the forces at play to a broad audience. See our longer conversation in the link below.

☀️🌍🔥📈 The real causes and effects of climate change summarized in 4.5 minutes! Top Canadian YouTuber Canadian Prepper did a great job summarizing the forces at play to a broad audience. See our longer conversation in the link below.

Leon Simons 🌍

34,441 Aufrufe • vor 2 Jahren