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
Pinned
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.
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.
Reposted by Dan Visioni
Our review is now live!
We have provided a large, comprehensive take of not just what we know, but also what we still need to know, and how, about how marine ecosystems could be affected by marine CDR and by Sunlight Reflection Methods (SRM). agupubs.onlinelibrary.wiley.com/doi/10.1029/...
We have provided a large, comprehensive take of not just what we know, but also what we still need to know, and how, about how marine ecosystems could be affected by marine CDR and by Sunlight Reflection Methods (SRM). agupubs.onlinelibrary.wiley.com/doi/10.1029/...
January 14, 2026 at 5:48 PM
Our review is now live!
We have provided a large, comprehensive take of not just what we know, but also what we still need to know, and how, about how marine ecosystems could be affected by marine CDR and by Sunlight Reflection Methods (SRM). agupubs.onlinelibrary.wiley.com/doi/10.1029/...
We have provided a large, comprehensive take of not just what we know, but also what we still need to know, and how, about how marine ecosystems could be affected by marine CDR and by Sunlight Reflection Methods (SRM). agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Our review is now live!
We have provided a large, comprehensive take of not just what we know, but also what we still need to know, and how, about how marine ecosystems could be affected by marine CDR and by Sunlight Reflection Methods (SRM). agupubs.onlinelibrary.wiley.com/doi/10.1029/...
We have provided a large, comprehensive take of not just what we know, but also what we still need to know, and how, about how marine ecosystems could be affected by marine CDR and by Sunlight Reflection Methods (SRM). agupubs.onlinelibrary.wiley.com/doi/10.1029/...
January 14, 2026 at 5:48 PM
Our review is now live!
We have provided a large, comprehensive take of not just what we know, but also what we still need to know, and how, about how marine ecosystems could be affected by marine CDR and by Sunlight Reflection Methods (SRM). agupubs.onlinelibrary.wiley.com/doi/10.1029/...
We have provided a large, comprehensive take of not just what we know, but also what we still need to know, and how, about how marine ecosystems could be affected by marine CDR and by Sunlight Reflection Methods (SRM). agupubs.onlinelibrary.wiley.com/doi/10.1029/...
insideclimatenews.org/news/0801202...
My day started early with a meeting with other Lead Authors in my chapter as we prep the Zero Order Draft for the IPCC next Assessment Report. As it now became usual, the first minutes were dedicated to commenting the US situation. “How am I doing?”, they ask?
My day started early with a meeting with other Lead Authors in my chapter as we prep the Zero Order Draft for the IPCC next Assessment Report. As it now became usual, the first minutes were dedicated to commenting the US situation. “How am I doing?”, they ask?
What Top Climate Scientists Think of Trump’s Treaty Withdrawals - Inside Climate News
Though the abandonment of international agreements is “a damn shame,” they say science will prevail.
insideclimatenews.org
January 9, 2026 at 12:36 AM
insideclimatenews.org/news/0801202...
My day started early with a meeting with other Lead Authors in my chapter as we prep the Zero Order Draft for the IPCC next Assessment Report. As it now became usual, the first minutes were dedicated to commenting the US situation. “How am I doing?”, they ask?
My day started early with a meeting with other Lead Authors in my chapter as we prep the Zero Order Draft for the IPCC next Assessment Report. As it now became usual, the first minutes were dedicated to commenting the US situation. “How am I doing?”, they ask?
Reposted by Dan Visioni
It appears there is no withdraw process for @ipcc.bsky.social, participation in which is voluntary, free and open to all UN and WMO members. So the Trump administration’s supposed withdraw means less than their June firing of all the staff of the State Dept’s Office of Global Change
IPCC Statement on the US announcement to withdraw from participation in IPCC — IPCC
www.ipcc.ch
January 8, 2026 at 7:26 PM
It appears there is no withdraw process for @ipcc.bsky.social, participation in which is voluntary, free and open to all UN and WMO members. So the Trump administration’s supposed withdraw means less than their June firing of all the staff of the State Dept’s Office of Global Change
Honestly, I think at this point this administration pulling out is better than the risk they would come to an approval session and just derail AR7 (had they found their way to the meeting place, incompetent as they are). And I don't think the IPCC will lack legitimacy by not involving a rogue govt.
Extraordinary that the US is pulling out of the IPCC and UNFCCC
There's no getting around it, this is a blow to international climate science and climate diplomacy
www.whitehouse.gov/presidential...
There's no getting around it, this is a blow to international climate science and climate diplomacy
www.whitehouse.gov/presidential...
Withdrawing the United States from International Organizations, Conventions, and Treaties that Are Contrary to the Interests of the United States
MEMORANDUM FOR THE HEADS OF EXECUTIVE DEPARTMENTS AND AGENCIES By the authority vested in me as President by the Constitution and the laws of the United
www.whitehouse.gov
January 8, 2026 at 4:52 PM
Honestly, I think at this point this administration pulling out is better than the risk they would come to an approval session and just derail AR7 (had they found their way to the meeting place, incompetent as they are). And I don't think the IPCC will lack legitimacy by not involving a rogue govt.
Reposted by Dan Visioni
The federal govt may be burning global cooperation on climate science to the ground, but we can and are pushing back where we can. We have more than 70 US scientists currently on IPCC reports, with more to be selected this month for CDR methods report. The USAA-IPCC coalition is up for this fight.
The US has some of the world’s best climate scientists (and more of them than anywhere else) & has contributed disproportionately to understanding the climate system. It’s idiotic for the US to withdraw from the UN Framework Convention on Climate Change & the IPCC but it’s on brand for this regime.
Withdrawing the United States from International Organizations, Conventions, and Treaties that Are Contrary to the Interests of the United States
MEMORANDUM FOR THE HEADS OF EXECUTIVE DEPARTMENTS AND AGENCIES By the authority vested in me as President by the Constitution and the laws of the United
www.whitehouse.gov
January 8, 2026 at 2:38 PM
The federal govt may be burning global cooperation on climate science to the ground, but we can and are pushing back where we can. We have more than 70 US scientists currently on IPCC reports, with more to be selected this month for CDR methods report. The USAA-IPCC coalition is up for this fight.
Well I’m going to IPCC even harder now.
January 8, 2026 at 3:47 AM
Well I’m going to IPCC even harder now.
2025 was a weird year with its ups and downs, and its big fights and tears and lots of what I think is valuable work, and I said yes to many things I shouldn’t have, but I guess above all it was when I ended up on stage with NDT and on his podcast and we partook of his alcohol stash after.
January 1, 2026 at 4:49 AM
2025 was a weird year with its ups and downs, and its big fights and tears and lots of what I think is valuable work, and I said yes to many things I shouldn’t have, but I guess above all it was when I ended up on stage with NDT and on his podcast and we partook of his alcohol stash after.
Every "best movies" list that doesn't include Love Actually is cursed.
December 29, 2025 at 3:54 PM
Every "best movies" list that doesn't include Love Actually is cursed.
Reposted by Dan Visioni
I like Ramez a lot but I disagree with him here. First, let's agree that oil and gas production are a complex case to model, because oil at least is subject to the behavior of a cartel (OPEC) and gas is increasingly international, with a few big buyers and sellers
Because the fossil fuel industry talking point of "We're just little humble neutral suppliers meeting the demand asked of us" is making a comeback, please consider the words of a senior exec at one of America's largest gas suppliers:
December 28, 2025 at 9:46 PM
I like Ramez a lot but I disagree with him here. First, let's agree that oil and gas production are a complex case to model, because oil at least is subject to the behavior of a cartel (OPEC) and gas is increasingly international, with a few big buyers and sellers
Reposted by Dan Visioni
my editor told us to try to keep our "best of" lists to five or less, but i found a workaround...
the climate story of the year, imo, was attacks on science
the climate story of the year, imo, was attacks on science
Reflecting on a year of attacks on climate science (and three other stories)
One of the defining themes of the past 11 months, and certainly one most pertinent to the climate beat, was “attacks on science and expertise,” which seem likely to continue into 2026.
thebulletin.org
December 26, 2025 at 3:44 PM
my editor told us to try to keep our "best of" lists to five or less, but i found a workaround...
the climate story of the year, imo, was attacks on science
the climate story of the year, imo, was attacks on science
Just hopping in here to brag about my best gift this year courtesy of my mom. Happy holidays y’all!
December 25, 2025 at 8:49 PM
Just hopping in here to brag about my best gift this year courtesy of my mom. Happy holidays y’all!
Springer Nature sending me a “Your 2025 in review” like a Spotify wrapped is both hilarious and uh alarming
December 23, 2025 at 4:23 PM
Springer Nature sending me a “Your 2025 in review” like a Spotify wrapped is both hilarious and uh alarming
Being harassed at an NBA game by the “public relations” guy of a startup you just wrote an op-ed against and ending it in a shouting match is definitely an experience I did not have in my AGU bingo for 2025.
December 19, 2025 at 2:38 AM
Being harassed at an NBA game by the “public relations” guy of a startup you just wrote an op-ed against and ending it in a shouting match is definitely an experience I did not have in my AGU bingo for 2025.