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
427.79 parts per million (ppm) CO2 in air 25-Dec-2025 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
423.04 parts per million (ppm) CO2 in air 03-Oct-2025 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
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...
Recent Research: What causes people to adopt sustainable technologies?
YouTube video by Environmental Psychology Groningen
youtube.com
429.80 parts per million (ppm) CO2 in air 22-Jun-2025 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
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.
If you’ve got a badge and a gun but think your actions are shameful enough to need a mask, you should quit.
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."
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
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!
Bethesda Declaration — STAND UP FOR SCIENCE
Support NIH Staff Now!
standupforscience.net
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
The Trump administration is undermining the collection and distribution of essential weather and climate information, right before hurricane season.
thebulletin.org
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
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
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
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
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
bit.ly
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.
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
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. ⬇️
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
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.
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
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
"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:
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
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.
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 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
Balloon-launch gaps are only one example of critical meteorological information that is on track to go missing in 2025.
thebulletin.org
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.
If you're in Austin, come visit!
Scripps Institution of Oceanography @scrippsocean.bsky.social · last yr.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/...
💻 ⚡ 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
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.
427.22 parts per million (ppm) CO2 in air 14-Feb-2025 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