Dan Visioni
@danvisioni.bsky.social
Climate scientist studying aerosols, chemistry, radiation, climate & society from Volcanoes 🌋and Climate Intervention. Assistant Professor at Cornell EAS, from 🇮🇹proudly🏳️🌈 More at https://dan-visioni.github.io/ and https://www.wcrp-climate.org/ci-overview
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Dan Visioni
@danvisioni.bsky.social
· Jan 30
We’re being told (or it is being implied) that we shouldn’t make political statements right now. But here’s the thing: respecting and recognizing the humanity of our transgender brothers and sisters (and of the whole LGBTQ community) is a matter of humanity, and one I am not willing to be silent on.
Reposted by Dan Visioni
Last December, weather and climate scientists sat down with us to tell us why they loved the National Center for Atmospheric Research, and why it benefits us all. Last night, the NSF began dismantling it. Listen to what they have to say, and why it's urgent that we #SaveNCAR wclivestream.com/act
We ❤️ NCAR - Let's Save It!
YouTube video by The Weather & Climate Livestream
www.youtube.com
February 13, 2026 at 10:27 PM
Last December, weather and climate scientists sat down with us to tell us why they loved the National Center for Atmospheric Research, and why it benefits us all. Last night, the NSF began dismantling it. Listen to what they have to say, and why it's urgent that we #SaveNCAR wclivestream.com/act
docs.google.com/document/d/1...
Hey folks, tried putting together a letter in direct response to the NSF unprompted decision. Feel free to offer suggestion or to add your name as a signatory, and thanks to those that did it alredy! Current text follows (errors all mine!)...
Hey folks, tried putting together a letter in direct response to the NSF unprompted decision. Feel free to offer suggestion or to add your name as a signatory, and thanks to those that did it alredy! Current text follows (errors all mine!)...
February 13, 2026 at 7:58 PM
docs.google.com/document/d/1...
Hey folks, tried putting together a letter in direct response to the NSF unprompted decision. Feel free to offer suggestion or to add your name as a signatory, and thanks to those that did it alredy! Current text follows (errors all mine!)...
Hey folks, tried putting together a letter in direct response to the NSF unprompted decision. Feel free to offer suggestion or to add your name as a signatory, and thanks to those that did it alredy! Current text follows (errors all mine!)...
Trying to put together a quick response to the announcement. Can folks (mainly US profs/researchers at this point) reach out if interested to chime in/join? Can share link to draft.
www.nsf.gov/news/transit...
I wish I had a good read on this, but I don’t and neither does anyone else right now. Definitely not good, but not clear how bad and how fast things could change now. Still time to respond to the DCL and say NCAR must stay together. If not for NCAR’s sake, for yours…
I wish I had a good read on this, but I don’t and neither does anyone else right now. Definitely not good, but not clear how bad and how fast things could change now. Still time to respond to the DCL and say NCAR must stay together. If not for NCAR’s sake, for yours…
Transitioning NCAR-Wyoming Supercomputing Center operations
The U.S. National Science Foundation has informed the NSF National Center for Atmospheric Research (NCAR) that management and operations of the NCAR-Wyoming Supercomputing Center are expected to…
www.nsf.gov
February 13, 2026 at 3:15 PM
Trying to put together a quick response to the announcement. Can folks (mainly US profs/researchers at this point) reach out if interested to chime in/join? Can share link to draft.
What changed after the repeal of the Endangerment Findings? Nothing, physics is still physics, CO₂ is a greenhouse gas, the rapid warming its increase produces is dangerous for our capacity to thrive on this 🌏 , burning coal is still bad for your lungs, this Administration is still full of twats.
February 13, 2026 at 1:03 PM
What changed after the repeal of the Endangerment Findings? Nothing, physics is still physics, CO₂ is a greenhouse gas, the rapid warming its increase produces is dangerous for our capacity to thrive on this 🌏 , burning coal is still bad for your lungs, this Administration is still full of twats.
www.nsf.gov/news/transit...
I wish I had a good read on this, but I don’t and neither does anyone else right now. Definitely not good, but not clear how bad and how fast things could change now. Still time to respond to the DCL and say NCAR must stay together. If not for NCAR’s sake, for yours…
I wish I had a good read on this, but I don’t and neither does anyone else right now. Definitely not good, but not clear how bad and how fast things could change now. Still time to respond to the DCL and say NCAR must stay together. If not for NCAR’s sake, for yours…
Transitioning NCAR-Wyoming Supercomputing Center operations
The U.S. National Science Foundation has informed the NSF National Center for Atmospheric Research (NCAR) that management and operations of the NCAR-Wyoming Supercomputing Center are expected to…
www.nsf.gov
February 13, 2026 at 3:53 AM
www.nsf.gov/news/transit...
I wish I had a good read on this, but I don’t and neither does anyone else right now. Definitely not good, but not clear how bad and how fast things could change now. Still time to respond to the DCL and say NCAR must stay together. If not for NCAR’s sake, for yours…
I wish I had a good read on this, but I don’t and neither does anyone else right now. Definitely not good, but not clear how bad and how fast things could change now. Still time to respond to the DCL and say NCAR must stay together. If not for NCAR’s sake, for yours…
Reposted by Dan Visioni
I objectively can’t find anything more nuanced than this sorry journalist friends
February 11, 2026 at 6:55 PM
I objectively can’t find anything more nuanced than this sorry journalist friends
I objectively can’t find anything more nuanced than this sorry journalist friends
February 11, 2026 at 6:55 PM
I objectively can’t find anything more nuanced than this sorry journalist friends
Reposted by Dan Visioni
Wonderful spending seven full days at one of the places I hold most dear in my heart, #NCAR, for three different workshops (two CESM winter meetings, one I help manage as co-chair of the Whole Atmosphere Working Group, and a mid-project meeting with the Planetary Sunshade Foundation)…
February 9, 2026 at 12:30 AM
Wonderful spending seven full days at one of the places I hold most dear in my heart, #NCAR, for three different workshops (two CESM winter meetings, one I help manage as co-chair of the Whole Atmosphere Working Group, and a mid-project meeting with the Planetary Sunshade Foundation)…
Wonderful spending seven full days at one of the places I hold most dear in my heart, #NCAR, for three different workshops (two CESM winter meetings, one I help manage as co-chair of the Whole Atmosphere Working Group, and a mid-project meeting with the Planetary Sunshade Foundation)…
February 9, 2026 at 12:30 AM
Wonderful spending seven full days at one of the places I hold most dear in my heart, #NCAR, for three different workshops (two CESM winter meetings, one I help manage as co-chair of the Whole Atmosphere Working Group, and a mid-project meeting with the Planetary Sunshade Foundation)…
Who the guy singing the anthem and can I get his number.
February 8, 2026 at 11:29 PM
Who the guy singing the anthem and can I get his number.
Reposted by Dan Visioni
Freedom from political retaliation. Freedom of movement to cultivate the best and brightest of America, including the students and researchers that make this country their home.
(2/3 🧵)
(2/3 🧵)
February 6, 2026 at 6:52 PM
Freedom from political retaliation. Freedom of movement to cultivate the best and brightest of America, including the students and researchers that make this country their home.
(2/3 🧵)
(2/3 🧵)
Reposted by Dan Visioni
This is why we say there can be no science-as-usual now. This passage is from Peter Drucker’s essay in the Atlantic about the crossroads that science stood at during Nazism. Science doesn’t just need funding — it needs the fundamental freedoms that come with democracy. Freedom of speech.
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February 6, 2026 at 6:51 PM
This is why we say there can be no science-as-usual now. This passage is from Peter Drucker’s essay in the Atlantic about the crossroads that science stood at during Nazism. Science doesn’t just need funding — it needs the fundamental freedoms that come with democracy. Freedom of speech.
(1/3🧵)
(1/3🧵)
Reposted by Dan Visioni
Meeting with Bjorn, followed by dinner with Woody Allen. The perfect day
February 1, 2026 at 2:01 AM
Meeting with Bjorn, followed by dinner with Woody Allen. The perfect day
As a scientist one encounters many challenges, some of them related to “shall I talk to this person or nah” but honestly “not canoodling with a known pedo for a few bucks” is easier than it sounds.
January 31, 2026 at 10:32 PM
As a scientist one encounters many challenges, some of them related to “shall I talk to this person or nah” but honestly “not canoodling with a known pedo for a few bucks” is easier than it sounds.
Fellas, at which point of the timeline are we when the vanilla hot gay couples on Facebook with normally just cheesy shirtless reels uses poly to bait you into abolishing ICE?
January 29, 2026 at 2:26 AM
Fellas, at which point of the timeline are we when the vanilla hot gay couples on Facebook with normally just cheesy shirtless reels uses poly to bait you into abolishing ICE?
We have a new paper out today, looking more in detail at the potential air quality impacts of Stratospheric Aerosol Injections, finding them more driven by climatic feedbacks than by deposition. This is the 1st questions one receives when discussing this, so really important to explore in depth!
Air quality impacts of stratospheric aerosol injections are likely small and mainly driven by changes in climate, not aerosol settling
Abstract. Stratospheric aerosol injection (SAI) is a proposed climate intervention method to offset future global warming through increased solar reflection in the stratosphere, but its broader enviro...
acp.copernicus.org
January 27, 2026 at 5:10 PM
We have a new paper out today, looking more in detail at the potential air quality impacts of Stratospheric Aerosol Injections, finding them more driven by climatic feedbacks than by deposition. This is the 1st questions one receives when discussing this, so really important to explore in depth!
Reposted by Dan Visioni
we are going to win
January 25, 2026 at 9:37 PM
we are going to win
Reposted by Dan Visioni
Bonus timeline cleanse
January 25, 2026 at 3:07 PM
Bonus timeline cleanse
Reposted by Dan Visioni
Damn the soulless Nazis of Trumpism straight to Hell.
January 25, 2026 at 12:51 AM
Damn the soulless Nazis of Trumpism straight to Hell.
I’m revolted & exhausted, which is normally when I need to be stomach-splitting angry angry. Right now, I’m angry at all the enablers of this regime, especially those I feel I share some responsibility with. This includes university administrators who bent the knee, showing the govt bullying works.
January 25, 2026 at 12:33 AM
I’m revolted & exhausted, which is normally when I need to be stomach-splitting angry angry. Right now, I’m angry at all the enablers of this regime, especially those I feel I share some responsibility with. This includes university administrators who bent the knee, showing the govt bullying works.
Reposted by Dan Visioni
And yes, community needs to make clear anybody suggesting NCAR can be sold for parts will be forever shunned by the whole global scientific community. We’ll save NCAR, united. But mainly we’ll save NCAR because NCAR deserves it, NCAR workers deserve it, and the world deserves NCAR. Non prevalebunt.
January 24, 2026 at 2:18 AM
And yes, community needs to make clear anybody suggesting NCAR can be sold for parts will be forever shunned by the whole global scientific community. We’ll save NCAR, united. But mainly we’ll save NCAR because NCAR deserves it, NCAR workers deserve it, and the world deserves NCAR. Non prevalebunt.
We knew the NSF letter about NCAR would come. I think this is an occasion that will require great coordination and strategical thinking. UCAR should respond as a block, coordinating a response across universities (especially in the South, and large public universities that use NCAR data a lot)
January 24, 2026 at 2:18 AM
We knew the NSF letter about NCAR would come. I think this is an occasion that will require great coordination and strategical thinking. UCAR should respond as a block, coordinating a response across universities (especially in the South, and large public universities that use NCAR data a lot)
Reposted by Dan Visioni
The level of racism and transphobia and shear callousness involved in people outside the US looking at what the US government is doing to people of color and trans folks here, some of whom are US citizens, and saying “these people are privileged” is intense
January 21, 2026 at 1:18 PM
The level of racism and transphobia and shear callousness involved in people outside the US looking at what the US government is doing to people of color and trans folks here, some of whom are US citizens, and saying “these people are privileged” is intense
Perspective pieces that are essentially “Nobody Has Ever Thought About This Issue Before: Look at How Smart We Are” that basically just… decide to not cite any of the past research that actually already engaged with that issue for a decade are very funny, but in a clownish way.
January 19, 2026 at 7:08 PM
Perspective pieces that are essentially “Nobody Has Ever Thought About This Issue Before: Look at How Smart We Are” that basically just… decide to not cite any of the past research that actually already engaged with that issue for a decade are very funny, but in a clownish way.
The horrors persist and honestly I don’t today.
January 16, 2026 at 1:05 PM
The horrors persist and honestly I don’t today.