Tim Garrett
@nephologue.bsky.social
Professor of Atmospheric Sciences at the University of Utah. All opinions predetermined and not my employer's.
Not the first time I've posted this, but I always find it quite fascinating how well it continues to hold. For over *two thousand years*, atmospheric CO2 perturbations have scaled with the world GDP. Aren't the implications for climate change mitigation pretty simple...?
August 1, 2025 at 9:21 PM
Not the first time I've posted this, but I always find it quite fascinating how well it continues to hold. For over *two thousand years*, atmospheric CO2 perturbations have scaled with the world GDP. Aren't the implications for climate change mitigation pretty simple...?
Glen, what are the uncertainties on the emissions? Could they be underreported for political reasons that introduce a flattened trend eg post Paris?
March 23, 2025 at 9:25 PM
Glen, what are the uncertainties on the emissions? Could they be underreported for political reasons that introduce a flattened trend eg post Paris?
The monitor packaging said 50% brain capacity at 1500 ppm which seems exaggerated. I’m frequently 50% at much lower levels
March 14, 2025 at 3:51 AM
The monitor packaging said 50% brain capacity at 1500 ppm which seems exaggerated. I’m frequently 50% at much lower levels
I find I can do scientific writing up to 5000 ppm. 40,000 is what I read as the limit. Like non-vented gas fireplaces are widely sold. Seems like a bad idea to me but presumably there’s other reasons humanity cognition is cratering
March 13, 2025 at 6:37 PM
I find I can do scientific writing up to 5000 ppm. 40,000 is what I read as the limit. Like non-vented gas fireplaces are widely sold. Seems like a bad idea to me but presumably there’s other reasons humanity cognition is cratering
I got my cabin up to 6000 ppm recently. Exercise in paleo time travel
March 11, 2025 at 4:33 AM
I got my cabin up to 6000 ppm recently. Exercise in paleo time travel
Of course, but comparing numbers with different units is the sort of thing education is supposed to fix
February 15, 2025 at 9:29 PM
Of course, but comparing numbers with different units is the sort of thing education is supposed to fix
Different units as one is annual. The two numbers can’t be compared as presented
February 15, 2025 at 6:32 PM
Different units as one is annual. The two numbers can’t be compared as presented
Through a research program for undergrads sponsored by the Dean’s office I am able to accomplish research goals it would be harder to do otherwise through my grants, impossible through department overhead. Does the Dean’s cut matter if it’s well spent?
February 10, 2025 at 3:18 AM
Through a research program for undergrads sponsored by the Dean’s office I am able to accomplish research goals it would be harder to do otherwise through my grants, impossible through department overhead. Does the Dean’s cut matter if it’s well spent?
Can you elaborate on what that 10% of indirects you mention went towards? It's not obvious how the dean controlling the money is a problem.
February 8, 2025 at 5:46 PM
Can you elaborate on what that 10% of indirects you mention went towards? It's not obvious how the dean controlling the money is a problem.
In 2017 at a small meeting in Switzerland on energy and the economy, experts scolded me that the economy would collapse from resource depletion and debt, certainly by 2025. I argued inertia would keep it growing longer (not forever). Here we are. Physics actually works! Always.
February 5, 2025 at 7:06 PM
In 2017 at a small meeting in Switzerland on energy and the economy, experts scolded me that the economy would collapse from resource depletion and debt, certainly by 2025. I argued inertia would keep it growing longer (not forever). Here we are. Physics actually works! Always.
So it turns out snowflake settling is full of surprises. Not just size, not just shape, not just density, not just turbulence, but perhaps more than anything it is the mean wind horizontal winds speeds that controls how fast snowflakes fall
essopenarchive.org/doi/full/10....
essopenarchive.org/doi/full/10....
Settling and rotation of frozen hydrometeors in turbulent air
Numerical model predictions of precipitation rates rely heavily on representations of how fast hydrometeors fall, assuming settling is determined only by the opposing force balance of gravity and drag...
essopenarchive.org
February 1, 2025 at 11:44 PM
So it turns out snowflake settling is full of surprises. Not just size, not just shape, not just density, not just turbulence, but perhaps more than anything it is the mean wind horizontal winds speeds that controls how fast snowflakes fall
essopenarchive.org/doi/full/10....
essopenarchive.org/doi/full/10....
Reposted by Tim Garrett
I developed an economic theory that underscores how energy and matter are the twin cornerstones of economic activity and growth, how mitigating climate change will require a fundamental restructuring of society. Here's a nice video produced about it
www.youtube.com/watch?v=soXW...
www.youtube.com/watch?v=soXW...
FAQ on the Garrett theory of economic growth
YouTube video by Economic Growth and Collapse
www.youtube.com
December 31, 2024 at 7:11 PM
I developed an economic theory that underscores how energy and matter are the twin cornerstones of economic activity and growth, how mitigating climate change will require a fundamental restructuring of society. Here's a nice video produced about it
www.youtube.com/watch?v=soXW...
www.youtube.com/watch?v=soXW...
What do you mean clouds are heavy? As a cloud physicist that strikes me as an odd comment. Relative to what? Their density is on average the same as surrounding air
December 30, 2024 at 6:17 AM
What do you mean clouds are heavy? As a cloud physicist that strikes me as an odd comment. Relative to what? Their density is on average the same as surrounding air
For a blog
nephologue.blogspot.com
nephologue.blogspot.com
Nephologue
Exploring the interplay of thermodynamics, economics, and climate
nephologue.blogspot.com
December 29, 2024 at 11:59 PM
For a blog
nephologue.blogspot.com
nephologue.blogspot.com
For an academic angle
esd.copernicus.org/articles/6/6...
esd.copernicus.org/articles/6/6...
ESD - Long-run evolution of the global economy – Part 2: Hindcasts of innovation and growth
esd.copernicus.org
December 29, 2024 at 11:59 PM
For an academic angle
esd.copernicus.org/articles/6/6...
esd.copernicus.org/articles/6/6...
Tim Garrett
@nephologue
Human history is the tension between boundless exponential expansion and the harsh reality of resource depletion and pollution. Can innovation forever keep us afloat, or will nature hasten our demise? A new video:
t.co/B35B4YBRSl
YouTube
Share your videos with friends, family, and the world
youtube.com
December 29, 2024 at 11:59 PM
Tim Garrett
@nephologue
Human history is the tension between boundless exponential expansion and the harsh reality of resource depletion and pollution. Can innovation forever keep us afloat, or will nature hasten our demise? A new video:
t.co/B35B4YBRSl
FWIW I’m a professor of Atmospheric Sciences. This stuff is just a side gig. You should make your own content !
December 28, 2024 at 8:39 PM
FWIW I’m a professor of Atmospheric Sciences. This stuff is just a side gig. You should make your own content !
New video. Our economic models are unscientific: their assumptions cannot potentially be disproved. Starting ground-up from thermodynamic principles, we can build new economic models that make the testable predictions we need to guide our economic future
www.youtube.com/watch?v=xFh0...
www.youtube.com/watch?v=xFh0...
The physical origins of economic Wealth
YouTube video by Economic Growth and Collapse
www.youtube.com
December 28, 2024 at 6:18 PM
New video. Our economic models are unscientific: their assumptions cannot potentially be disproved. Starting ground-up from thermodynamic principles, we can build new economic models that make the testable predictions we need to guide our economic future
www.youtube.com/watch?v=xFh0...
www.youtube.com/watch?v=xFh0...
New preprint of a submission to GRL presenting theoretical and numerical arguments that tropical cloud height can be determined from the mean tropospheric temperature profile alone
essopenarchive.org/doi/full/10....
essopenarchive.org/doi/full/10....
Cloud edge energy adjusts to the saturated tropospheric mean independent of climate state
Large-scale integral constraints on cloud behaviors can guide their more precise representation in present and future climates. We show theoretically that the moist static energy evaluated at cloud ed...
essopenarchive.org
December 24, 2024 at 6:06 PM
New preprint of a submission to GRL presenting theoretical and numerical arguments that tropical cloud height can be determined from the mean tropospheric temperature profile alone
essopenarchive.org/doi/full/10....
essopenarchive.org/doi/full/10....
We must face the limits to our economic growth. Civilization thrives on high availability of energy and material resources, but at the cost of pollution and depletion. Traditional economics trivializes these constraints and risks hastening our collapse
www.youtube.com/watch?v=Ip5l...
www.youtube.com/watch?v=Ip5l...
The physical limits to economic growth
YouTube video by Economic Growth and Collapse
www.youtube.com
December 21, 2024 at 4:12 PM
We must face the limits to our economic growth. Civilization thrives on high availability of energy and material resources, but at the cost of pollution and depletion. Traditional economics trivializes these constraints and risks hastening our collapse
www.youtube.com/watch?v=Ip5l...
www.youtube.com/watch?v=Ip5l...
Civilization grows by efficiently using an energy surplus to transform the earth's crust into the stuff of us.
However, growth has limits. Resource depletion and internal decay will tip us towards collapse. A new video:
www.youtube.com/watch?v=hOdo...
However, growth has limits. Resource depletion and internal decay will tip us towards collapse. A new video:
www.youtube.com/watch?v=hOdo...
Humanity’s economic conundrum
YouTube video by Economic Growth and Collapse
www.youtube.com
December 19, 2024 at 11:23 PM
Civilization grows by efficiently using an energy surplus to transform the earth's crust into the stuff of us.
However, growth has limits. Resource depletion and internal decay will tip us towards collapse. A new video:
www.youtube.com/watch?v=hOdo...
However, growth has limits. Resource depletion and internal decay will tip us towards collapse. A new video:
www.youtube.com/watch?v=hOdo...
The basis is non-equilibrium thermodynamics, which may sound daunting, but these concepts underlie our lives. I think the animations led by Michael Fardos really help develop an intuitive understanding of economic growth and decline. I hope you enjoy
www.youtube.com/channel/UCA6...
www.youtube.com/channel/UCA6...
Economic Growth and Collapse
www.youtube.com
December 18, 2024 at 7:09 PM
The basis is non-equilibrium thermodynamics, which may sound daunting, but these concepts underlie our lives. I think the animations led by Michael Fardos really help develop an intuitive understanding of economic growth and decline. I hope you enjoy
www.youtube.com/channel/UCA6...
www.youtube.com/channel/UCA6...
Key topics covered by the channel include efficiency, innovation, climate change, climate damages, energy and raw material resources, consumption, depletion, pollution, GDP growth, and economic inflation
December 18, 2024 at 7:09 PM
Key topics covered by the channel include efficiency, innovation, climate change, climate damages, energy and raw material resources, consumption, depletion, pollution, GDP growth, and economic inflation