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Dan Visioni

@danvisioni.bsky.social

1.9K followers 580 following 2.3K posts

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.

Dan Visioni @danvisioni.bsky.social · 4d

So many things I appreciated, but among the top ones, definitely the book’s bold and funny exploration of identity and sexuality (both human and non 🤓) and its vivid description of what it would mean to interact with nature in a highly futuristic world. And the captivating writing of course!

Dan Visioni @danvisioni.bsky.social · 4d

I just finished reading “The Terraformers” by @annaleen.bsky.social and it made me so happy I need to share it here. It is rare to find such forward-looking, powerful sci-fi that manages to be hopeful about humanity while not shying away from its problems.

Dan Visioni @danvisioni.bsky.social · 8d

Dudes in dresses, obviously!

Dan Visioni @danvisioni.bsky.social · 10d

It depends a lot on the mood. Of course there are go-tos like LOTR, and Ursula LeGuin has many novels that are masterpieces and I love re-reading often. But if I had to choose my favorite it would be The Once and Future King by White. There is something there that moves me in ways nothing else does.

Dan Visioni @danvisioni.bsky.social · 20d

what scientists can provide is plan, be transparent about goals and aims, and work to provide both the scientific rationale for it and the pathway to a safe implementation.

Dan Visioni @danvisioni.bsky.social · 20d

as a potential *complement* (never a substitute) to decarbonisation for managing climate risk. Other people can disagree, and that's ok! Future decisions will not be up to me or any other single person:

Dan Visioni @danvisioni.bsky.social · 20d

Here we lay out how that could be done safely, and successfully, considering a range of (increasing) scales with safeguards at every step. I think doing this kind of research is incredibly important, and could lead to much better insight into the potential risks as well as benefits of SAI...

Dan Visioni @danvisioni.bsky.social · 20d

If you want to resolve scientific uncertainties around SAI (would it work as intended? are there things we have not foreseen in our models?), outdoor experiments with careful tracking and measurements will be necessary, as well as plans on how to improve the underlying modeling basis we use.

Dan Visioni @danvisioni.bsky.social · 20d

Together with providing an overview of what we know (and how we know it) about sulfate and its role in climate, and how Stratospheric Aerosol Injections *might* contribute to cooling in the future, we also go through a proposal for a "clinical trial" for SAI.

Dan Visioni @danvisioni.bsky.social · 20d

Dakota Gruener and I have a new piece out in the new issue of @worksinprogress.bsky.social : worksinprogress.co/issue/sunscr...

Sunscreen for the planet - Works in Progress Magazine

The world is warming faster than we can cut emissions. But volcanoes already been cool the planet accidentally. If nature can cool the Earth, maybe we can.

worksinprogress.co

Reposted by Dan Visioni

Matthew Henry @mattjohenry.bsky.social · 20d

Beautifully illustrated and clear write-up on SRM by @danvisioni.bsky.social and Dakota Gruener.

worksinprogress.co/issue/sunscr...

Sunscreen for the planet - Works in Progress Magazine

The world is warming faster than we can cut emissions. But volcanoes already been cool the planet accidentally. If nature can cool the Earth, maybe we can.

worksinprogress.co

Dan Visioni @danvisioni.bsky.social · 21d

See Ozone Assessment (Chapter 6): csl.noaa.gov/assessments/...

UNEP report: www.unep.org/resources/re...

World Climate Research Program report: www.frontiersin.org/journals/cli...

NOAA CSL: Scientific Assessment of Ozone Depletion: 2022

NOAA CSL: Advancing scientific understanding of the chemical and physical processes that affect Earth's atmospheric composition and climate.

Dan Visioni @danvisioni.bsky.social · 21d

Molly, great article. But there are multiple scientific assessments of the potential risks (and benefits) of SRM, like a NASEM report and a Ozone Assessment from the Montreal Protocols: why link to the CIEL report that is unscientific and full of disinformation (not dissimilar from Greene's)?

Dan Visioni @danvisioni.bsky.social · 21d

I have a large collection 🙃

Dan Visioni @danvisioni.bsky.social · 22d

Or you can go listen to the House Committee hearing where a meteorology undergrad with no understanding of physics and a nepo-baby share trite climate denialism and discuss how to ban SRM research with the most nuts-o member of congress, that also works!

Dan Visioni @danvisioni.bsky.social · 22d

Today we joined Natalie Mahowald, Lead Author of the IPCC 1.5SRE, to have a wide-ranging discussion on the topic of geoengineering, from the science to the governance challenges and ethical implications. Thanks to @cornelluniversity.bsky.social for organizing!

www.youtube.com/watch?v=o15F...

Geoengineering: The Science and Myths of Climate Intervention

YouTube video by eCornell

www.youtube.com

Dan Visioni @danvisioni.bsky.social · 26d

A fair question to ask: however, using our estimates in an Energy-Balance Model indicate a cooling of around 0.03C, so too small to detect in the global temperature record over a couple of years, considering other sources of variability.

Dan Visioni @danvisioni.bsky.social · 27d

It will surprise the readers to know that this is not just the practice of the new DOE, but of many other "holier than thou" groups who have decided that lying about science when it doesn't align with their values is ok when they do it. They're trying to send a message, you see?

Dan Visioni @danvisioni.bsky.social · 27d

and dismissing research that disagrees with your desired conclusions by claiming that those other researchers are driven by shady interests, would result in such assessment saying exactly what you wanted from the beginning, uh?

(and no, this is not just about the DOE report)

Dan Visioni @danvisioni.bsky.social · 27d

Who would have guessed that putting together your own group of people to write an "assessment" with the specific goal from the beginning to come out with a specific set of conclusions, cherry-picking data, highlighting uncertainties to imply there is no understanding, ...

Dan Visioni @danvisioni.bsky.social · Sep 5

Other more recent studies already highlighted this - our results show how consistent this outcome is across different models and set-ups.

Our preprint is here: egusphere.copernicus.org/preprints/20...

More info on the protocols is here: gmd.copernicus.org/articles/18/...

Multi-model analysis of the radiative impacts of the 2022 Hunga eruption indicates a significant cooling contribution from the volcanic plume

Abstract. On January 15, 2022, the Hunga volcano eruption released unprecedented amounts of water vapor into the atmosphere alongside a modest amount of SO2. In this work we analyse results from multi...

egusphere.copernicus.org

Dan Visioni @danvisioni.bsky.social · Sep 5

When Hunga happened, some suggested it would lead to net warming, due to the large burden of H2O injected in the stratosphere. Models generally didn't find this for a few reasons: mainly, i) water vapor too high up from the tropopause and ii) H2O leading to quick formation of large sulfate aerosols

Dan Visioni @danvisioni.bsky.social · Sep 5

Out as preprint, we have some very interesting results looking at the radiative forcing impacts of the 2022 Hunga eruption. Based on the outcomes of the related OMIP, with many models from all over the world participating in this effort, we find a robust cooling signal from the Hunga volcanic plume.

Reposted by Dan Visioni

Dan Visioni @danvisioni.bsky.social · Aug 25

Tomorrow is the start of my Climate Dynamics course. While I was incredibly excited to teach it before -I ❤️ this class- this year feels exciting in different ways: doesn’t matter who is in charge or what censorship they demand, physics’s physics. More motivated than ever to engage with my students!😎

Dan Visioni @danvisioni.bsky.social · Aug 25

Tomorrow is the start of my Climate Dynamics course. While I was incredibly excited to teach it before -I ❤️ this class- this year feels exciting in different ways: doesn’t matter who is in charge or what censorship they demand, physics’s physics. More motivated than ever to engage with my students!😎