• 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 / 2023 / Archives for May 2023

Archives for May 2023

Evaluation of GCM simulations with a regional focus.

31 May 2023 by rasmus

Do the global climate models (GCMs) we use for describing future climate change really capture the change and variations in the region that we want to study? There are widely used tools for evaluating global climate models, such as the ESMValTool, but they don’t provide the answers that I seek.

I use GCMs to provide information about large-scale conditions, processes and phenomena in the atmosphere that I can use as predictors in downscaling future climate projections. I also want to know whether the ensemble of GCM simulations that I use provides representative statistics of the actual regional climate I’m interested in. 

[Read more…] about Evaluation of GCM simulations with a regional focus.

Filed Under: Climate modelling, Climate Science, Featured Story, statistics Tagged With: CMIP5, CMIP6

CMIP6: Not-so-sudden stratospheric cooling

21 May 2023 by Gavin

As predicted in 1967 by Manabe and Wetherald, the stratosphere has been cooling.

A new paper by Ben Santer and colleagues has appeared in PNAS where they extend their previous work on the detection and attribution of anthropogenic climate change to include the upper stratosphere, using observations from the Stratospheric Sounding Units (SSUs) (and their successors, the AMSU instruments) that have flown since 1979.

[Read more…] about CMIP6: Not-so-sudden stratospheric cooling

References

  1. B.D. Santer, S. Po-Chedley, L. Zhao, C. Zou, Q. Fu, S. Solomon, D.W.J. Thompson, C. Mears, and K.E. Taylor, "Exceptional stratospheric contribution to human fingerprints on atmospheric temperature", Proceedings of the National Academy of Sciences, vol. 120, 2023. http://dx.doi.org/10.1073/pnas.2300758120

Filed Under: Climate modelling, Climate Science, Featured Story, Greenhouse gases, Instrumental Record, Sun-earth connections Tagged With: CMIP6, SSU

Unforced variations: May 2023

1 May 2023 by group

This month’s open thread on climate topics. Please be succinct, courteous and on point.

Filed Under: Climate Science, Open thread, Solutions

Primary Sidebar

Search

Search for:

Email Notification

get new posts sent to you automatically (free)
Loading

Recent Posts

  • EPA’s final* ruling on CO2
  • The Climate Science reference they don’t want Judges to read
  • Koonin’s Continuing Calumnies
  • Unforced variations: Feb 2026
  • 2025 Updates
  • A peek behind the curtain…

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

  • Data on EPA’s final* ruling on CO2
  • Data on EPA’s final* ruling on CO2
  • Data on Unforced variations: Feb 2026
  • Data on EPA’s final* ruling on CO2
  • Data on EPA’s final* ruling on CO2
  • Data on EPA’s final* ruling on CO2
  • Nigelj on EPA’s final* ruling on CO2
  • Tom Fuller on EPA’s final* ruling on CO2
  • Ray Ladbury on Unforced variations: Feb 2026
  • Ray Ladbury on The Climate Science reference they don’t want Judges to read
  • Ron R. on The Climate Science reference they don’t want Judges to read
  • Ray Ladbury on EPA’s final* ruling on CO2
  • Susan Anderson on EPA’s final* ruling on CO2
  • Susan Anderson on EPA’s final* ruling on CO2
  • Susan Anderson on The Climate Science reference they don’t want Judges to read
  • Tomáš Kalisz on 2025 Updates
  • Ron R. on The Climate Science reference they don’t want Judges to read
  • Barton Paul Levenson on The Climate Science reference they don’t want Judges to read
  • Thomas W Fuller on EPA’s final* ruling on CO2
  • Data on Unforced variations: Feb 2026
  • Data on EPA’s final* ruling on CO2
  • Martin Smith on EPA’s final* ruling on CO2
  • Joseph O'Sullivan on EPA’s final* ruling on CO2
  • Nigelj on The Climate Science reference they don’t want Judges to read
  • Piotr on 2025 Updates
  • Joseph O'Sullivan on EPA’s final* ruling on CO2
  • Nigelj on Unforced variations: Feb 2026
  • Tomáš Kalisz on EPA’s final* ruling on CO2
  • patrick o twentyseven on The Climate Science reference they don’t want Judges to read
  • Secular Animist on EPA’s final* ruling on CO2

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

1,398 posts

15 pages

250,408 comments

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