• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer

RealClimate

Climate science from climate scientists...

  • Start here
  • Model-Observation Comparisons
  • Miscellaneous Climate Graphics
  • Surface temperature graphics
You are here: Home / Archives for Scientific practice

Scientific practice

Scenarios, schmenarios…

20 May 2026 by Gavin 24 Comments

The fantasy version of the normal updating of scenarios for a new round of CMIP simulations doing the rounds is bad faith BS.

[Read more…] about Scenarios, schmenarios…

Filed Under: Aerosols, Climate impacts, Climate modelling, Climate Science, Featured Story, Greenhouse gases, In the News, IPCC, Reporting on climate, Scientific practice Tagged With: CMIP6, CMIP7, projections, RCP85, SSP585

A reflection on reflection

13 Apr 2026 by Gavin 226 Comments

Confirmation bias and a profound lack of curiosity mark the latest ABC (Anything But Carbon) contrapalooza in DC this week and a decade-old albedo error trips them up.

[Read more…] about A reflection on reflection

Filed Under: Climate modelling, Climate Science, Featured Story, Instrumental Record, Scientific practice, skeptics Tagged With: albedo, CMIP5, CMIP6, Earth's Energy Imbalance, Heartland Institute, John Clauser, Willie Soon

A peek behind the curtain…

23 Jan 2026 by group

New email releases from the EDF/UCS lawsuit against the DOE provide a rarely-seen behind the curtain look at how the climate contrarians work.

[Read more…] about A peek behind the curtain…

Filed Under: Climate Science, Featured Story, In the News, Scientific practice, skeptics Tagged With: DOE, Endangerment Finding

AI/ML climate magic?

5 Jan 2026 by rasmus

There has been a frenzy around artificial intelligence and deep machine learning (AI/ML) since the “ChatGPT Moment” in 2022, and AI/ML is for sure going to affect us all. It strikes me that this buzz also looks more like a science fiction story (utopy/dystopy) than the old-fashion Clondyke goldrush craze. 

[Read more…] about AI/ML climate magic?

Filed Under: Climate modelling, Climate Science, downscaling, Featured Story, Scientific practice

“But you said the ice was going to disappear in 10 years!”

21 Sep 2025 by Gavin

Almost two decades ago, some scientists predicted that Arctic summer sea ice would ‘soon’ disappear. These predictions were mentioned by Al Gore and got a lot of press. However, they did not gain wide acceptance in the scientific community, and were swiftly disproven. Unsurprisingly, this still comes up a lot. Time for a deeper dive into what happened and why…

[Read more…] about “But you said the ice was going to disappear in 10 years!”

Filed Under: Arctic and Antarctic, Climate modelling, Climate Science, Featured Story, Instrumental Record, Scientific practice Tagged With: Arctic, predictions, sea ice

DOE CWG Report “Moot”?

10 Sep 2025 by Gavin

Somewhat breaking news. A court filing (from 9/4) from DOE has noted that the Climate Working Group has been disbanded (as of 9/3). This was done to make the EDF/UCS lawsuit moot, but it also means that DOE is withdrawing the report, no-one will respond appropriately to the comments submitted, and (possibly) it becomes irrelevant for the EPA reconsideration of the Endangerment Finding.

What a farce.

Update: Via Andy Revkin, the EDF/UCS’s blistering response to the DOE filing. Pass the popcorn.

Filed Under: Climate impacts, Climate modelling, Climate Science, Featured Story, Instrumental Record, IPCC, Model-Obs Comparisons, Scientific practice

Climate Scientists response to DOE report

2 Sep 2025 by Gavin

As we’ve mentioned, Andrew Dessler and Robert Kopp have been coordinating a scientific peer review of the DOW ‘CWG’ Critique of Climate Science. It is now out.

[Read more…] about Climate Scientists response to DOE report

Filed Under: Arctic and Antarctic, Carbon cycle, Climate impacts, Climate modelling, Climate Science, Featured Story, Greenhouse gases, Hurricanes, Instrumental Record, IPCC, Model-Obs Comparisons, Scientific practice, Sea level rise, Sun-earth connections Tagged With: CWG, DOE, Endangerment Finding

Melange à Trois

8 Jul 2025 by Gavin

In honor of the revelation today, that Koonin, Christy and Spencer have been made Special Government Employees at the Dept. of Energy, we present a quick round up of our commentary on the caliber of their arguments we’ve posted here over the last decade or so.

TL;DR? The arguments are not very good.

[Read more…] about Melange à Trois

Filed Under: Climate Science, Featured Story, In the News, Instrumental Record, Model-Obs Comparisons, Scientific practice Tagged With: John Christy, MSU, Roy Spencer, Steve Koonin

We need NOAA now more than ever

12 Mar 2025 by group

Guest commentary by Robert Hart, Kerry Emanuel, & Lance Bosart

Protester holding a homemade "Defend NOAA" sign in Washington Square. Credit: Gavin Schmidt

The National Weather Service (NWS) and its parent agency, the National Oceanic and Atmospheric
Administration (NOAA), delivers remarkable value to the taxpayers. This efficiency can be demonstrated by its enormous return on investment. For example, the NWS costs only several dollars per citizen to operate each year, yet results in an estimated 10-100 times larger financial return that includes: improved citizen preparedness, improved transportation efficiency and safety, increased private sector profits, improved disaster prevention and mitigation, and impressive scientific research innovation that is significantly also contributed to by other related federal agencies, the private sector, and the academic research community.

Recent NWS initiatives have even more directly connected weather and ocean observations and forecasts to emergency preparation and public impact. To quote a 2019 study referenced below, “Partnership with the NWS has revolutionized this Emergency Management community from on that reacts to events to one that proactively prepares and stays ahead of the extreme events.” The societal benefits of reasonably predicting the future cannot be understated, and such prediction and resulting benefits were unimaginable only 75 years ago.

Critical taxpayer-funded investments over the past decades have led to greatly improved weather forecast models, observations from the ocean, ground, aircraft, and space, and theoretical understanding through scientific research. These all have had an enormous impact on lives and property. The forecasts and associated critical watches and warnings we see every day on television, the internet, or phone apps could not be possible without NOAA and the NWS. It is estimated that the tax revenue generated from the private sector using NOAA data and services easily pays for the entire cost of the NWS.

Those who remember weather forecasts from the 1970s through 1980s can appreciate these dramatic evolutionary improvements given how inferior those forecasts were compared to today. Going further back, landfalling hurricanes in the first half of that century often came with no warning. If you read newspaper front pages from the mornings of September 7, 1900, or September 21, 1938, you will find there is no mention of the historic and catastrophic events about to unfold only hours later. This would be unthinkable today given the scientific investments we have paid for.

These massive improvements extend beyond hurricane (and also snowstorm) forecasting and preparedness. Tornado warning lead time has also improved markedly during the same time period. Casualty rates from tornadoes have not increased despite a very rapid increase in population. At minimum, hundreds of thousands of people are alive today who would not be without our investments in NOAA and NWS.

The advent of skillful weather forecasting, along with the increased preparedness it allows, remains a landmark achievement of not only this country but of the human race. There are few other fields in the sciences where skillful prediction not only has had immense impact on our society, but is even possible. We should be extraordinarily proud of this achievement.

The current expulsion of primarily younger NOAA employees without cause and with disturbingly short notice is cruel to them personally and professionally. The youngest employees are the future of any organization, government or otherwise, and bring with them unique energy, skills, and ideas. Every government organization should strive to become more efficient, and must be subjected to careful oversight, since taxpayer funding is precious and entrusted to the government by the people. However, the instrument of wise oversight is the scalpel, not the chainsaw. The recent seemingly arbitrary and capricious reductions, notably made without Congressional oversight, are seriously jeopardizing the future of the country and more generally the property and lives of hundreds of millions of tax-paying families who have invested in these truly remarkable achievements over many decades.

References:

“National Weather Service Enterprise Analysis Report. Findings on changes in the private weather
industry”,
2017.

“Evolving the National Weather Service to Build a Weather-Ready Nation: Connecting
Observations, Forecasts, and Warnings to Decision-Makers through Impact-Based Decision
Support Services”,
Bulletin of the American Meteorological Society, October 2019.

“Using the National Weather Service’s impact-based decision support services to prepare for
extreme winter storms
“, Journal of Emergency Management, November/December 2019.

“Impact-Based Decision Support Services (IDSS) and Socioeconomic Impacts of Winter Storms”,
Bulletin of the American Meteorological Society, May 2020.

“Communicating Forecast Uncertainty (CoFU) 2: Replication and Extension of a Survey of the US
Public’s Sources, Perceptions, Uses, and Values for Weather Information.”
American
Meteorological Society Policy Program Study, September 2024.

“The Social Value of Hurricane Forecasts”, SSRN Journal, December 2024.

Reprint from the Daily Camera

Filed Under: Climate Science, Featured Story, Hurricanes, Instrumental Record, Scientific practice, Sea level rise Tagged With: NOAA, NWS

Science is not value free

18 Oct 2024 by Gavin

An interesting commentary addressing a rather odd prior commentary makes some very correct points.

[Read more…] about Science is not value free

Filed Under: Climate Science, Communicating Climate, Featured Story, Scientific practice Tagged With: activism, advocacy

  • Page 1
  • Page 2
  • Page 3
  • Interim pages omitted …
  • Page 8
  • Go to Next Page »

Primary Sidebar

Search

Search for:

Email Notification

get new posts sent to you automatically (free)
Loading

Recent Posts

  • Scenarios, schmenarios…
  • Unforced Variations: May 2026
  • Unforced Variations: Apr 2026
  • A reflection on reflection
  • Spencer’s Shenanigans: Part II
  • The Puzzling Pleistocene

Our Books

Book covers
This list of books since 2005 (in reverse chronological order) that we have been involved in, accompanied by the publisher’s official description, and some comments of independent reviewers of the work.
All Books >>

Recent Comments

  • Tomáš Kalisz on A reflection on reflection
  • jgnfld on A reflection on reflection
  • Charles Hett on Scenarios, schmenarios…
  • Bart Verheggen on Scenarios, schmenarios…
  • Yebo Kando on Scenarios, schmenarios…
  • Ray Ladbury on A reflection on reflection
  • Robert Cutler on A reflection on reflection
  • Ray Ladbury on A reflection on reflection
  • Ray Ladbury on Scenarios, schmenarios…
  • Martin Smith on A reflection on reflection
  • Robert Cutler on A reflection on reflection
  • Joke Zonderkop on Scenarios, schmenarios…
  • prl on Unforced Variations: May 2026
  • Nigelj on A reflection on reflection
  • jgnfld on Scenarios, schmenarios…
  • Tomáš Kalisz on A reflection on reflection
  • Yebo Kando on Scenarios, schmenarios…
  • Dan Miller on Scenarios, schmenarios…
  • Robert Cutler on A reflection on reflection
  • Paul Pukite (@whut) on A reflection on reflection
  • zebra on Scenarios, schmenarios…
  • iännis Roland on Scenarios, schmenarios…
  • Roger Pielke Jr on Scenarios, schmenarios…
  • Martin Smith on A reflection on reflection
  • Graham Townsend on Scenarios, schmenarios…
  • Joke Zonderkop on Scenarios, schmenarios…
  • MEV on Scenarios, schmenarios…
  • jgnfld on A reflection on reflection
  • Secular Animist on Scenarios, schmenarios…
  • Tomáš Kalisz on A reflection on reflection

Footer

ABOUT

  • About
  • Translations
  • Privacy Policy
  • Contact Page
  • Login

DATA AND GRAPHICS

  • Data Sources
  • Model-Observation Comparisons
  • Surface temperature graphics
  • Miscellaneous Climate Graphics

INDEX

  • Acronym index
  • Index
  • Archives
  • Contributors

Realclimate Stats

1,406 posts

15 pages

251,562 comments

Copyright © 2026 · RealClimate is a commentary site on climate science by working climate scientists for the interested public and journalists.