William Revelle
@revelle.bsky.social
Professor of Psychology at Northwestern.
Studying Personality and intelligence
Developer of the psych package for R.
See personality-project.org/revelle.html
Studying Personality and intelligence
Developer of the psych package for R.
See personality-project.org/revelle.html
Reposted by William Revelle
423.04 parts per million (ppm) CO2 in air 03-Oct-2025
keelingcurve.ucsd.edu
keelingcurve.ucsd.edu
The Keeling Curve
The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.
keelingcurve.ucsd.edu
October 4, 2025 at 4:52 PM
423.04 parts per million (ppm) CO2 in air 03-Oct-2025
keelingcurve.ucsd.edu
keelingcurve.ucsd.edu
Reposted by William Revelle
New paper!
Our PhD-student Phillip conducted a meta-analysis of psychological determinants of sustainable energy technology adaption.
Rather than writing an extensive 🧵 here, Phillip summarises our work in the video below
www.youtube.com/shorts/2NIZh... www.sciencedirect.com/science/arti...
Our PhD-student Phillip conducted a meta-analysis of psychological determinants of sustainable energy technology adaption.
Rather than writing an extensive 🧵 here, Phillip summarises our work in the video below
www.youtube.com/shorts/2NIZh... www.sciencedirect.com/science/arti...
Recent Research: What causes people to adopt sustainable technologies?
YouTube video by Environmental Psychology Groningen
www.youtube.com
August 26, 2025 at 8:58 AM
New paper!
Our PhD-student Phillip conducted a meta-analysis of psychological determinants of sustainable energy technology adaption.
Rather than writing an extensive 🧵 here, Phillip summarises our work in the video below
www.youtube.com/shorts/2NIZh... www.sciencedirect.com/science/arti...
Our PhD-student Phillip conducted a meta-analysis of psychological determinants of sustainable energy technology adaption.
Rather than writing an extensive 🧵 here, Phillip summarises our work in the video below
www.youtube.com/shorts/2NIZh... www.sciencedirect.com/science/arti...
Reposted by William Revelle
429.80 parts per million (ppm) CO2 in air 22-Jun-2025
keelingcurve.ucsd.edu
keelingcurve.ucsd.edu
The Keeling Curve
The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.
keelingcurve.ucsd.edu
June 23, 2025 at 4:13 PM
429.80 parts per million (ppm) CO2 in air 22-Jun-2025
keelingcurve.ucsd.edu
keelingcurve.ucsd.edu
Reposted by William Revelle
Celebrating the solstice (plus 3 days) with the latest version of psych (2.5.6) and psychTools (2.5.7.22 -- it took a few tries to get it) which are now on CRAN.
Small improvements and minor bug and typo fixes (see the news files).
Added a function to report the information in correlations.
Small improvements and minor bug and typo fixes (see the news files).
Added a function to report the information in correlations.
June 23, 2025 at 9:39 PM
Celebrating the solstice (plus 3 days) with the latest version of psych (2.5.6) and psychTools (2.5.7.22 -- it took a few tries to get it) which are now on CRAN.
Small improvements and minor bug and typo fixes (see the news files).
Added a function to report the information in correlations.
Small improvements and minor bug and typo fixes (see the news files).
Added a function to report the information in correlations.
Reposted by William Revelle
If you’ve got a badge and a gun but think your actions are shameful enough to need a mask, you should quit.
June 20, 2025 at 9:49 PM
If you’ve got a badge and a gun but think your actions are shameful enough to need a mask, you should quit.
Reposted by William Revelle
The impacts of Trump's campaign against American science will likely be profound, write John P. Holdren and Neal Lane.
"The rapidly growing damage to the scientific pillar of American well-being and influence requires that Republican members of Congress stand up to rein Trump in."
"The rapidly growing damage to the scientific pillar of American well-being and influence requires that Republican members of Congress stand up to rein Trump in."
Time for Congress to save American science…and the nation
"We believe the best hope for saving science and, perhaps, saving our form of democracy, is convincing at least a couple dozen Republican members of Congress that it’s up to them—that the stakes require exercising the prerogatives of the Congress to constrain excesses by the Executive Branch and resuming the serious conversations, debates, and compromise across the aisle and between the branches that used to be the way policy was made."
thebulletin.org
June 6, 2025 at 2:37 PM
The impacts of Trump's campaign against American science will likely be profound, write John P. Holdren and Neal Lane.
"The rapidly growing damage to the scientific pillar of American well-being and influence requires that Republican members of Congress stand up to rein Trump in."
"The rapidly growing damage to the scientific pillar of American well-being and influence requires that Republican members of Congress stand up to rein Trump in."
Reposted by William Revelle
There is a second support letter that the public can sign.
You can help advance medical
cures in the US, and defend against Trump’s tyrannical attacks on the country, by signing it. Please do. We hope for your support.
And please share with your family and friends!
You can help advance medical
cures in the US, and defend against Trump’s tyrannical attacks on the country, by signing it. Please do. We hope for your support.
And please share with your family and friends!
Bethesda Declaration — STAND UP FOR SCIENCE
Support NIH Staff Now!
www.standupforscience.net
June 9, 2025 at 12:20 PM
There is a second support letter that the public can sign.
You can help advance medical
cures in the US, and defend against Trump’s tyrannical attacks on the country, by signing it. Please do. We hope for your support.
And please share with your family and friends!
You can help advance medical
cures in the US, and defend against Trump’s tyrannical attacks on the country, by signing it. Please do. We hope for your support.
And please share with your family and friends!
Reposted by William Revelle
The Trump administration is undermining the collection and distribution of essential weather and climate information, right before hurricane season.
"Decommissioned, retired, paused: The weather, climate, and Earth science data the government doesn’t want you to see," by @jessimckenzi.bsky.social.
"Decommissioned, retired, paused: The weather, climate, and Earth science data the government doesn’t want you to see," by @jessimckenzi.bsky.social.
Decommissioned, retired, paused: The weather, climate, and Earth science data the government doesn’t want you to see
The Trump administration is undermining the collection and distribution of essential weather and climate information, right before hurricane season.
thebulletin.org
May 20, 2025 at 6:57 PM
The Trump administration is undermining the collection and distribution of essential weather and climate information, right before hurricane season.
"Decommissioned, retired, paused: The weather, climate, and Earth science data the government doesn’t want you to see," by @jessimckenzi.bsky.social.
"Decommissioned, retired, paused: The weather, climate, and Earth science data the government doesn’t want you to see," by @jessimckenzi.bsky.social.
Reposted by William Revelle
The Trump administration's disassembling of the National Oceanic and Atmospheric Administration is threatening the Keeling Curve, an iconic measure used in climate change research.
"How the dismantling of NOAA threatens the Keeling Curve," by Eric Morgan and Ralph Keeling. ⬇️
"How the dismantling of NOAA threatens the Keeling Curve," by Eric Morgan and Ralph Keeling. ⬇️
How the dismantling of NOAA threatens the Keeling Curve
How the Trump administration's dismantling of the National Oceanic and Atmospheric Administration threatens the Keeling Curve, an iconic measure used in climate change research. As explained by the so...
thebulletin.org
May 7, 2025 at 7:59 PM
The Trump administration's disassembling of the National Oceanic and Atmospheric Administration is threatening the Keeling Curve, an iconic measure used in climate change research.
"How the dismantling of NOAA threatens the Keeling Curve," by Eric Morgan and Ralph Keeling. ⬇️
"How the dismantling of NOAA threatens the Keeling Curve," by Eric Morgan and Ralph Keeling. ⬇️
Reposted by William Revelle
The Trump administration has dismissed the scientists behind the U.S. climate report.
Now scientific societies are stepping in to finish the job—because the climate crisis doesn’t pause for politics.
Science will not be silenced.
apnews.com/article/clim...
#ClimateScience #StandUpForScience
Now scientific societies are stepping in to finish the job—because the climate crisis doesn’t pause for politics.
Science will not be silenced.
apnews.com/article/clim...
#ClimateScience #StandUpForScience
Scientific societies say they'll step up after Trump puts key climate report in doubt
Two major scientific societies say they will try to fill the void from the Trump administration’s dismissal of scientists writing a cornerstone federal report on what climate change is doing to the Un...
apnews.com
May 7, 2025 at 9:13 PM
The Trump administration has dismissed the scientists behind the U.S. climate report.
Now scientific societies are stepping in to finish the job—because the climate crisis doesn’t pause for politics.
Science will not be silenced.
apnews.com/article/clim...
#ClimateScience #StandUpForScience
Now scientific societies are stepping in to finish the job—because the climate crisis doesn’t pause for politics.
Science will not be silenced.
apnews.com/article/clim...
#ClimateScience #StandUpForScience
Reposted by William Revelle
In the "Best Opening Paragraph of a Research Paper" category, a favorite
My problem is that I have been persecuted by an integer. For seven years this number has followed me
around, has intruded in my most private data, and has assaulted me from the pages of our most public
journals. bit.ly/3RLp5yT
My problem is that I have been persecuted by an integer. For seven years this number has followed me
around, has intruded in my most private data, and has assaulted me from the pages of our most public
journals. bit.ly/3RLp5yT
bit.ly
April 14, 2025 at 1:38 AM
In the "Best Opening Paragraph of a Research Paper" category, a favorite
My problem is that I have been persecuted by an integer. For seven years this number has followed me
around, has intruded in my most private data, and has assaulted me from the pages of our most public
journals. bit.ly/3RLp5yT
My problem is that I have been persecuted by an integer. For seven years this number has followed me
around, has intruded in my most private data, and has assaulted me from the pages of our most public
journals. bit.ly/3RLp5yT
Reposted by William Revelle
The current level of CO2 in the atmosphere is 427 parts per million. What does that mean, and what can we do about it?
On April 17, join the Bulletin for a virtual event on the risks of climate change and how to understand what planetary shifts are inevitable—and which have solutions.
On April 17, join the Bulletin for a virtual event on the risks of climate change and how to understand what planetary shifts are inevitable—and which have solutions.
Beyond the Threshold: The Urgency of Climate Change
On April 17, join the Bulletin of the Atomic Scientists to explore the risks of climate change and how to understand what planetary shifts are inevitable – and which are solvable – in this current era...
pages.thebulletin.org
April 8, 2025 at 9:45 PM
The current level of CO2 in the atmosphere is 427 parts per million. What does that mean, and what can we do about it?
On April 17, join the Bulletin for a virtual event on the risks of climate change and how to understand what planetary shifts are inevitable—and which have solutions.
On April 17, join the Bulletin for a virtual event on the risks of climate change and how to understand what planetary shifts are inevitable—and which have solutions.
Reposted by William Revelle
An "apparent attempt by Russia to infect AI chatbots themselves with propaganda shows that the internet as we know it may be changed forever."
What can be done to mitigate the harms of LLM grooming?
Read more from Annie Newport and @ninajankowicz.com. ⬇️
What can be done to mitigate the harms of LLM grooming?
Read more from Annie Newport and @ninajankowicz.com. ⬇️
Russian networks flood the Internet with propaganda, aiming to corrupt AI chatbots
A pro-Russia network is internally corrupting large-language models to reproduce disinformation and propaganda.
thebulletin.org
March 26, 2025 at 5:47 PM
An "apparent attempt by Russia to infect AI chatbots themselves with propaganda shows that the internet as we know it may be changed forever."
What can be done to mitigate the harms of LLM grooming?
Read more from Annie Newport and @ninajankowicz.com. ⬇️
What can be done to mitigate the harms of LLM grooming?
Read more from Annie Newport and @ninajankowicz.com. ⬇️
Reposted by William Revelle
Yesterday, Maine Senator Angus King grilled US Director of National Intelligence, Tulsi Gabbard, about the 2025 Annual Threat Assessment, which made no mention of climate change for the first time in 11 years.
@jessimckenzi.bsky.social reports below.
@jessimckenzi.bsky.social reports below.
Maine senator grills intelligence director Gabbard on omission of climate change from annual threat report
Gabbard implied that climate change was no longer considered a direct threat to US national security.
thebulletin.org
March 26, 2025 at 3:00 PM
Yesterday, Maine Senator Angus King grilled US Director of National Intelligence, Tulsi Gabbard, about the 2025 Annual Threat Assessment, which made no mention of climate change for the first time in 11 years.
@jessimckenzi.bsky.social reports below.
@jessimckenzi.bsky.social reports below.
Celebrating the Equinox with the release of psychTools 2.5.3 to CRAN. (joining psych 2.5.3)
Addition to vJoin but more importantly, edits to 4 vignettes:
Introduction to the psych package
Overview of the psych package for psychometrics
Using the psych package for factor analysis
How to find Omega
Addition to vJoin but more importantly, edits to 4 vignettes:
Introduction to the psych package
Overview of the psych package for psychometrics
Using the psych package for factor analysis
How to find Omega
March 24, 2025 at 3:10 PM
Celebrating the Equinox with the release of psychTools 2.5.3 to CRAN. (joining psych 2.5.3)
Addition to vJoin but more importantly, edits to 4 vignettes:
Introduction to the psych package
Overview of the psych package for psychometrics
Using the psych package for factor analysis
How to find Omega
Addition to vJoin but more importantly, edits to 4 vignettes:
Introduction to the psych package
Overview of the psych package for psychometrics
Using the psych package for factor analysis
How to find Omega
Reposted by William Revelle
"Ice loss in Greenland is already large, greatly accelerated from centuries of near stability, and irreversible. [...] Though a tipping point for future ice loss is already crossed, the pace of this loss is still not set in stone," writes Twila Moon.
Read more below:
Read more below:
The shrinking of the Greenland Ice Sheet can’t be stopped—but it can and must be slowed
Ice loss in Greenland is already large, irreversible, and greatly accelerated after centuries of near stability. Though a tipping point for future ice loss has already been crossed, the pace of this l...
thebulletin.org
March 24, 2025 at 2:13 PM
"Ice loss in Greenland is already large, greatly accelerated from centuries of near stability, and irreversible. [...] Though a tipping point for future ice loss is already crossed, the pace of this loss is still not set in stone," writes Twila Moon.
Read more below:
Read more below:
Congratulations to Dan Mroczek for a life time Achievement award from the European Association of Personality Psychology.
Also honored were Emorie Beck with the Early Achievement Award
Chris Soto the Mid Career award.
Antonis Koutsoumpis the EAPP dissertation award.
Reinout de Vries for Leadership.
Also honored were Emorie Beck with the Early Achievement Award
Chris Soto the Mid Career award.
Antonis Koutsoumpis the EAPP dissertation award.
Reinout de Vries for Leadership.
March 21, 2025 at 7:08 PM
Congratulations to Dan Mroczek for a life time Achievement award from the European Association of Personality Psychology.
Also honored were Emorie Beck with the Early Achievement Award
Chris Soto the Mid Career award.
Antonis Koutsoumpis the EAPP dissertation award.
Reinout de Vries for Leadership.
Also honored were Emorie Beck with the Early Achievement Award
Chris Soto the Mid Career award.
Antonis Koutsoumpis the EAPP dissertation award.
Reinout de Vries for Leadership.
Celebrate the solstice with the latest release of psych 2.5.3 now on CRAN.
The basic bug fixes (thanks all for finding them) and the addition of some minor suggestions from a number of users.
Update to psychTools coming soon. (Required psych to be on CRAN first.)
The basic bug fixes (thanks all for finding them) and the addition of some minor suggestions from a number of users.
Update to psychTools coming soon. (Required psych to be on CRAN first.)
March 21, 2025 at 7:00 PM
Celebrate the solstice with the latest release of psych 2.5.3 now on CRAN.
The basic bug fixes (thanks all for finding them) and the addition of some minor suggestions from a number of users.
Update to psychTools coming soon. (Required psych to be on CRAN first.)
The basic bug fixes (thanks all for finding them) and the addition of some minor suggestions from a number of users.
Update to psychTools coming soon. (Required psych to be on CRAN first.)
Reposted by William Revelle
"The ability to observe, forecast, and warn of impactful weather is being degraded. This is putting American lives and the American economy in danger."
"Hurricane Elon: DOGE cuts could cause meteorologists to miss the next 'nightmare' storm," by
@johnmoralestv.bsky.social.
"Hurricane Elon: DOGE cuts could cause meteorologists to miss the next 'nightmare' storm," by
@johnmoralestv.bsky.social.
Hurricane Elon: DOGE cuts could cause meteorologists to miss the next ‘nightmare’ storm
Balloon-launch gaps are only one example of critical meteorological information that is on track to go missing in 2025.
thebulletin.org
March 10, 2025 at 7:16 PM
"The ability to observe, forecast, and warn of impactful weather is being degraded. This is putting American lives and the American economy in danger."
"Hurricane Elon: DOGE cuts could cause meteorologists to miss the next 'nightmare' storm," by
@johnmoralestv.bsky.social.
"Hurricane Elon: DOGE cuts could cause meteorologists to miss the next 'nightmare' storm," by
@johnmoralestv.bsky.social.
Reposted by William Revelle
It's not real.
It's not us.
It's not bad.
It's too hard to fix.
It's too late.
Just about every climate denial argument I've ever heard is a variant of one of these five categories, and each one is as bad as the next.
Why? Because they all have the same goal: prevent action as long as possible.
It's not us.
It's not bad.
It's too hard to fix.
It's too late.
Just about every climate denial argument I've ever heard is a variant of one of these five categories, and each one is as bad as the next.
Why? Because they all have the same goal: prevent action as long as possible.
March 10, 2025 at 7:59 PM
It's not real.
It's not us.
It's not bad.
It's too hard to fix.
It's too late.
Just about every climate denial argument I've ever heard is a variant of one of these five categories, and each one is as bad as the next.
Why? Because they all have the same goal: prevent action as long as possible.
It's not us.
It's not bad.
It's too hard to fix.
It's too late.
Just about every climate denial argument I've ever heard is a variant of one of these five categories, and each one is as bad as the next.
Why? Because they all have the same goal: prevent action as long as possible.
Reposted by William Revelle
If you're in Austin, come visit!
Heading to #SXSW? Check out this panel featuring @keelingcurve.bsky.social PI Ralph Keeling that explores how scientists track CO2, developing tools designed to ‘bend the curve’ toward sustainability and the curiosity and collective action needed to get us there.
schedule.sxsw.com/2025/events/...
schedule.sxsw.com/2025/events/...
The Quest to Capture Carbon and Bend the Curve
SXSW 2025 Schedule | Carbon dioxide levels have been rising since the burning of fossil fuels began during the Industrial Revolution. This greenhouse gas is raising temperatures around the planet, alt...
schedule.sxsw.com
March 6, 2025 at 5:29 PM
If you're in Austin, come visit!
Reposted by William Revelle
💻 ⚡ By harnessing the power of supercomputers, a team of scientists from Scripps Oceanography, NASA Jet Propulsion Laboratory and NASA Goddard Space Flight Center uncovered that small-scale ocean processes may have a far greater impact on storm development than previously believed.
Supercomputers Reveal How Small Ocean Processes Influence Storms
A team of scientists from UC San Diego’s Scripps Institution of Oceanography, NASA Jet Propulsion Laboratory and NASA Goddard Space Flight Center have discovered that small-scale ocean processes can h...
today.ucsd.edu
March 7, 2025 at 5:32 PM
💻 ⚡ By harnessing the power of supercomputers, a team of scientists from Scripps Oceanography, NASA Jet Propulsion Laboratory and NASA Goddard Space Flight Center uncovered that small-scale ocean processes may have a far greater impact on storm development than previously believed.
Standing up for science in Chicago
March 7, 2025 at 6:36 PM
Standing up for science in Chicago
David Condon and I are very pleased that our Unidim paper is finally out at Psychological Measurement: Open access at
dx.doi.org/10.1037/met0...
We describe the unidim statistic which has been available in the psych package for several years.
We compare u to CFI, omega_h, and other estimates.
dx.doi.org/10.1037/met0...
We describe the unidim statistic which has been available in the psych package for several years.
We compare u to CFI, omega_h, and other estimates.
March 4, 2025 at 8:09 PM
David Condon and I are very pleased that our Unidim paper is finally out at Psychological Measurement: Open access at
dx.doi.org/10.1037/met0...
We describe the unidim statistic which has been available in the psych package for several years.
We compare u to CFI, omega_h, and other estimates.
dx.doi.org/10.1037/met0...
We describe the unidim statistic which has been available in the psych package for several years.
We compare u to CFI, omega_h, and other estimates.