Roger Pielke Jr.

Roger Pielke Jr.

Making sense of science, policy, and politics.

Senior Fellow, American Enterprise Institute · Professor Emeritus, University of Colorado Boulder

About Roger

Latest from The Honest Broker on Substack

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Sep 23, 2026

Fool Us Once

A Trojan Horse effort to place RCP8.5 back at the center of climate science and policy

Sep 22, 2026

The Economic Costs of the Iran War: THB Sept Update

How much Americans are paying for the war in fuel, taxes, and interest

Sep 17, 2026

Taking Us for Fools

How a turnkey method attributes any trend to climate change

Active Data Projects

Five public dashboards, each with its own data sources and its own update schedule.

Latest Site Updates

New pages, new measures and corrections across the dashboards over the past week, apart from the routine daily data updates.

US Extreme Weather

  • Sep 24New link The winter storms page now links to Ryan Maue’s map of every cyclone on Earth and how deep each one got — a measure of storm strength, where the page’s snowfall index covers impact only.
  • Sep 21Front page The drought summary on the front page now rests on a rainfall record reaching back to the nineteenth century, long enough to test for a trend. The measure it replaced covers too few years.
  • Sep 20New page A new page on the difference between a detected change, as measured here, and the IPCC’s judgment on when a climate signal has emerged — together with a full reproduction of the IPCC’s summary table.
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Global Extreme Weather

  • Sep 20New finding A new calculation: how many years of records a projected warming trend would need before showing up at all. Only the hottest day of the year has a projection precise enough to test against.
  • Sep 20New page The same new page as on the US dashboard, for the global record: the difference between a detected change here and the IPCC’s assessment of when a climate signal has emerged.
  • Sep 18New data Hurricane and typhoon landfalls worldwide, counted season by season, alongside Ryan Maue’s independently compiled record as a check.
All updates →