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Leon Simons

@leonsimons.com

579 Following12.3k Followers

Mission: To understand & protect the home planet. Innovator, climate research & communication, social entrepreneur. Board member Club of Rome NL

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@leonsimons.comOct 11, 2026, 4:59 PM

Climate Chat is now airing:
COOL, REDUCE, REMOVE: THE EMERGENCY BLUEPRINT TO RESTORE THE CLIMATE

With HPAC's Dennis Garrity
youtu.be/U93am5q3pcw

@leonsimons.comOct 9, 2026, 4:06 PM

Thank you for taking a look at the data yourself and for reproducing the graph. Too few do that.

@leonsimons.comOct 8, 2026, 4:42 PM

With a negative Relative Oceanic Niño Index...

@vincentdehart.bsky.socialOct 7, 2026, 10:02 AMReposted by @leonsimons.com

"De aarde blijkt veel gevoeliger voor broeikasgassen dan gedacht. Het pad naar 4 tot 6 graden ligt nog open, met een reëel risico op 3 graden wereldwijde opwarming rond 2050."

@leonsimons.comOct 6, 2026, 9:08 PM

Met politiek ‘doormodderen’ wordt de klimaatontwrichting ernstiger

www.volkskrant.nl/columns-opin...

@leonsimons.comOct 6, 2026, 9:07 PM

If only we published the actual science in scientific journals too 🤦

@leonsimons.comOct 6, 2026, 9:04 PM

I don't fully agree. People (especially Zeke) underestimate what an aerosol forcing change centered over the ocean does. Of course it's both aerosols and feedbacks (from GHG and aerosol forcing changes) that lead to the Absorbed Solar Radiation increase

@leonsimons.comOct 6, 2026, 8:27 PM

🚨 BREAKING Y-AXIS 🌊🌡📈

Record warm waters in the main El Niño region reached >30°C for the first time in the @noaa.gov Sea Surface Temperature dataset.

We've ain't seen nothing yet of the impacts this will have around the world.

@leonsimons.comOct 3, 2026, 6:46 PM

@rarohde.bsky.social what happened to the @berkeleyearth.org GMSAT dataset?

@leonsimons.comOct 3, 2026, 2:29 PM

🚨NASA CERES satellite data shows another 4-year average record for global Absorbed Solar Radiation. Earth's Energy Imbalance has more than doubled over the past 20 years. We've been trying to warn about this and the impacts for years, but few seem to care.

@leonsimons.comOct 1, 2026, 6:44 PM

Thank you. Great questioning by Bryony Worthington!

@danmiller999.bsky.socialSep 30, 2026, 6:18 AMReposted by @leonsimons.com

Sunday 10/4 at 10am PT on Climate Chat: Debunking the Myths: Why Carbon Removal Can Scale with 'Godfather' of CDR, Klaus Lackner, who was the 1st to propose CDR as a climate solution.
#CDR #ClimateCrisis
@leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social
youtube.com/live/bnI-2ck...

@leonsimons.comSep 30, 2026, 12:28 AM

A +5.34°C Sea Surface Temperature anomaly for the Niño 1 + 2 region! 🌊🌡📈 🤯

@williamripple.bsky.socialSep 28, 2026, 4:01 PMReposted by @leonsimons.com

We invite everyone (nonscientists) to endorse the Declaration of a Planetary Emergency, part of the upcoming World Scientists’ Warning to Humanity: A Third Notice. Add your name and share widely. Endorsement helps show public concern about the future of our planet. forms.gle/vAARd7mv2yS7...

@micefearboggis.bsky.socialSep 27, 2026, 1:29 PMReposted by @leonsimons.com

Ok comms gurus… if we’re talking about ocean heat content and earth’s energy imbalance which units are preferable: ZJ and ZJ per year or W/m²year and W/m². Or something else. Or putting everything in terms of some energy equivalent like how much energy humans use each year.

@danmiller999.bsky.socialSep 26, 2026, 10:08 PMReposted by @leonsimons.com

Sunday 9/27 at 10am PT on Climate Chat: What They Don’t Tell You About NY Climate Week, with host @danmiller999.bsky.social.
#Climate #SRM
@leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social
youtube.com/live/hajvS7n...

@leonsimons.comSep 27, 2026, 1:36 PM

A combination is best imo. Depending on the audience and time. 1 W/m² is about 0.5 PW (a joule per second with 15 zeros) of global heat at 510 trillion square meters of global area. Without weakening the AMOC was about 1 PW.

@marckonijn.bsky.socialSep 26, 2026, 7:53 AMReposted by @leonsimons.com

Het is een jaar geleden dat een gerenommeerd wetenschappelijk instituut uit 🇩🇪 deze alarmerende boodschap bracht:

dat we over 25 jaar al de catastrofale 3 graden kunnen aantikken omdat de 🌏 steeds meer energie vasthoudt.

Hier de 🧵 van @leonsimons.com

Dit was de reactie van de wereld

👇

1/

@marckonijn.bsky.socialSep 23, 2026, 1:23 PMReposted by @leonsimons.com

Ik heb Leon daarover geïnterviewd een paar jaar geleden, en heb dit verhaal geschreven - verreweg mijn meest gelezen stuk op Reporters Online

Het zou nog veel, veel meer gelezen moeten worden, gezien de snelle, abrupte gevolgen van de versnelling in opwarming

3/

reportersonline.nl/zonder-het-t...

@leonsimons.comSep 20, 2026, 8:15 AM

Is Solar Geoengineering Too Risky?
With Chris Parker

Join us later today on Climate Chat.
Link below.
See the time for your region in the link below and subscribe and hit the bell button to get a notification when we go live.

www.youtube.com/live/-GyXpRs...

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