Gavin Schmidt
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climateofgavin.bsky.social
Gavin Schmidt
@climateofgavin.bsky.social

Climate scientist, juggler. Bikes etc. Blogging at https://www.realclimate.org - data visualization, explainers, and debunking.

Gavin A. Schmidt is a British climatologist, climate modeler and Director of the NASA Goddard Institute for Space Studies (GISS) in New York, and co-founder of the climate science blog RealClimate. .. more

Environmental science 50%
Geology 21%
In the century leading up to 1975, nearly 6000 freighters went down in the Great Lakes.

The Edmund Fitzgerald was the last.

The last. In 50 years, not a single commercial freighter has been lost in the Great Lakes.

Why?

It's NOAA. Of course it's NOAA.

Battered and fried with a spicy remoulade generally. It works well.

The last harvest…

Reposted by Gavin A. Schmidt

Here astrophysicist Jason Wright does an excellent job explaining why Avi is wrong:
(7/7)
sites.psu.edu/astrowright/...
Loeb’s 3I/ATLAS “Anomalies” Explained
Avi Loeb continues to claim that 3I/ATLAS has many anomalous behaviors that lead to the conclusion that it “might” be an alien spacecraft.  He carefully hedges the probability that it is a spacecraft ...
sites.psu.edu

Reposted by Gavin A. Schmidt

Why are planetary scientists, astrobiologists and and SETI scientists so negative (pissed off, even) about Avi Loeb’s repeated claims that 3I/Atlas may be an invading alien spaceship?
🧵
🧪🔭🛸
(1/7)

the broader distribution is because of regional differences in warming rates. It's not a function of (potentially) increased variance locally (which, as you rightly state, is a much harder call).

That had me riveted to my screen. Crazy.

Reposted by Gavin A. Schmidt

Arizona has paused development of hundreds of thousands of homes on the far Phoenix fringes due to insufficient groundwater supplies, @highcountrynews.org finds: www.hcn.org/issues/57-10...
The dried-out subdivisions of Phoenix - High Country News
A groundwater crisis halted the construction of thousands of homes and pitted affordability against environmental concerns.
www.hcn.org
BREAKING: Mark Wolf, appointed to the federal bench by Ronald Reagan, writes that he is resigning as a judge to have the freedom to speak out against the president's assault on the rule of law.
www.theatlantic.com/ideas/2025/1...
Today I wrote about Zohran Mamdani's historic win, the energizing power of holding to shared principles of decency, and a taxonomy of the endlessly intertwined relationship between shame and vision. www.the-reframe.com/the-extraord...
The Extraordinary Power of Standing For Something
Winning by creating vision in the positive space of shared standards, and expertly negotiating the negative space of shame.
www.the-reframe.com

Reposted by Gavin A. Schmidt

It’s really important that #Vancouver’s Downtown Business Association, who were originally against bike-lanes, are now among their most vigourous supporters, because of ACTUAL EVIDENCE that they’re better for downtown business than any street parking they replaced.

Safe bike-lanes mean business.
When people celebrate the individual genius of folks in science, they should also
mourn the collective loss of genius of folks who were actively discouraged or disadvantaged from a career in science because of the same person(s)

Thanks to all of the collaborators, co-authors, workshop attendees and even reviewer #2. Including a few here @ruthmottram.bsky.social @drtwilamoon.bsky.social @jlbamber.bsky.social

The process - from the workshop to the final paper - has been a tremendous collaboration from folks all over the world with very diverse interests and backgrounds and I think this will be a great step forward in how we can improve the interactions between ice sheets and oceans in climate modeling.

And that led to a broader interest in doing this better - bringing in more regional info, better iceberg melt maps, inclusion of more kinds of observations. This also led to deeper exploration of what different climate models actually do - and why!

My group did some preliminary work assessing whether it might make a difference - and it did! For SST, salinity, sea ice and SLR…

doi.org/10.1029/2023...
Anomalous Meltwater From Ice Sheets and Ice Shelves Is a Historical Forcing
The response to anomalous meltwater from ice sheets and shelves is large enough for it to be a forcing in historical climate simulations When the GISS model includes these drivers, Southern Ocean...
doi.org

A bit of background. In CMIP6 no models included interactive ice sheets, and while different groups made slightly different assumptions about ice sheet mass balance, none had changes that matched the observations (from GRACE or in situ measurements).
Finally out! The outcome of a virtual workshop in Feb 2024 with modelers and observationalists to put together data and protocols to include historical changes in ice sheet/ice shelf discharge in CMIP models. Hopefully not too late for some CMIP7 runs!

gmd.copernicus.org/articles/18/...
Datasets and protocols for including anomalous freshwater from melting ice sheets in climate simulations
Abstract. Anomalous freshwater fluxes from the Greenland and Antarctic ice sheets and ice shelves are impacting the surrounding oceans, and we need to be able to account for these effects in climate m...
gmd.copernicus.org
ICYMI: Microsoft’s charge “implies a more than $12 billion quarterly loss at OpenAI, said Firoz Valliji, an analyst at Bernstein.”

That “would mark one of the largest single-quarter losses for a tech company in history.”

@jessefelder.bsky.social $MSFT
www.wsj.com/livecoverage...

It’s really remarkable how thin the bench of climate change deniers is and how deep the poverty of their arguments. They haven’t come up with anything new in decades and can only fall back on conspiracies to explain their lack of success.
Joe Rogan has one of the world's most popular podcasts. Unfortunately, like nearly all of the most popular online shows, his tends to spread climate misinformation. For @climateconnections.bsky.social I scrutinize his recent episode with octogenarian climate contrarians Lindzen & Happer 🧵 (1/11)
Five ways Joe Rogan misleads listeners about climate change  » Yale Climate Connections
Rogan exposes millions to climate denial. Let’s break down his tactics.
yaleclimateconnections.org

Reposted by Gavin A. Schmidt

Thoughts from Aravind Ravichandran as NASA (again) flirts with moving Earth observation to commercial data buys:

“Here is an underappreciated irony: commercial EO companies already depend on NASA's public infrastructure.”

newsletter.terrawatchspace.com/why-science-...
Why "Science-as-a-Service" Doesn't Work for Earth Science
There has been a lot of talk lately about whether commercial Earth observation (EO) companies could replace parts of NASA’s Earth science mission portfolio. With a new Administrator coming in, that de...
newsletter.terrawatchspace.com
Joe Rogan has one of the world's most popular podcasts. Unfortunately, like nearly all of the most popular online shows, his tends to spread climate misinformation. For @climateconnections.bsky.social I scrutinize his recent episode with octogenarian climate contrarians Lindzen & Happer 🧵 (1/11)
Five ways Joe Rogan misleads listeners about climate change  » Yale Climate Connections
Rogan exposes millions to climate denial. Let’s break down his tactics.
yaleclimateconnections.org

Reposted by Gavin A. Schmidt

"Many of the features of a zero-budget conference are preferable to more traditional ways of organizing conferences, and... we’d like to encourage other conference organizers to consider adopting them..."
How (and Why) to Organize a Zero-Budget Conference (guest post) - Daily Nous
"Obtain free publicity for your conference by writing a post for Daily Nous in which you get to mention it." That's not really part of the post, but I have to give Craig Agule (Rutgers University-Camd...
dailynous.com
🚨🚨🚨 The jury has reached a verdict. Sean Dunn, aka the DC Sandwich Guy, has been found NOT GUILTY of assault.

Reposted by Peter Thorne

Math.... what is it good for?
If he is saying billion, with a B, that's about 400 pounds per person, which seems like an unhealthy amount of weight to lose. bsky.app/profile/acyn...
Oz: We thought it was 125 million pounds. Our estimate is Americans will lose 135 billion pounds by the midterms
If he is saying billion, with a B, that's about 400 pounds per person, which seems like an unhealthy amount of weight to lose. bsky.app/profile/acyn...
Oz: We thought it was 125 million pounds. Our estimate is Americans will lose 135 billion pounds by the midterms

It’s one thing to have different environmental/health priorities for your foundation, it’s quite another to have been bankrolling one of the primary sources of bullshit on the topic.
Bill Gates Gave $3.5M to Think Tank Run by Climate Crisis Denier Bjorn Lomborg

By @rtakver.bsky.social @desmog.com
www.desmog.com/2025/11/05/b...

Reposted by Gavin A. Schmidt

"I don't know, Mr Betteridge, what do you think?"

Reposted by Peter Thorne

It’s one thing to have different environmental/health priorities for your foundation, it’s quite another to have been bankrolling one of the primary sources of bullshit on the topic.