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Unforced Variations: Oct 2024

1 Oct 2024 by group

This month’s open thread for climate topics. Please stay vaguely on topic and do not abuse other commenters.

Filed Under: Climate Science, Open thread, Solutions

Phantastic Job!

19 Sep 2024 by Gavin

A truly impressive paper was published this week with a new reconstruction of global temperatures over the last ~500 million years.

[Read more…] about Phantastic Job!

Filed Under: Climate modelling, Climate Science, Paleoclimate Tagged With: Phanerozoic

Unforced Variations: Sep 2024

1 Sep 2024 by group

This month’s open thread on climate topics. Try to be constructive!

Filed Under: Climate Science, Open thread, Solutions

Oh My, Oh Miocene!

28 Aug 2024 by Gavin

A recent paper suggested that ‘climate sensitivity’ derived from a new paleo-CO2 record is around 7.2ºC (for equilibrium climate sensitivity ECS) and ~13.9ºC (Earth System Sensitivity – ESS) for a doubling of CO2. Some press has suggested that this means that “Earth’s Temperature Could Increase by 25 Degrees” (F). Huge if true! Fortunately these numbers should not be taken at face value, but we need to dig into the subtleties to see why.

[Read more…] about Oh My, Oh Miocene!

Filed Under: Carbon cycle, Climate modelling, Climate Science, Greenhouse gases, Paleoclimate Tagged With: ECS, ESS, Miocene, paleo-CO2, replication

The need for pluralism in climate modelling

24 Aug 2024 by group

How should we allocate resources for climate modelling if the goal is to improve climate-related decisions? Higher resolution, machine learning and/or storylines? A call for a deeper discussion on how we should develop the climate modelling toolbox.

Guest post by Marina Baldissera Pacchetti, Julie Jebeile and Erica Thompson

[Read more…] about The need for pluralism in climate modelling

Filed Under: Climate modelling, Climate Science, climate services, Solutions Tagged With: CMIP6, GCMs, km-scale, Machine Learning

Unforced variations: Aug 2024

1 Aug 2024 by group

This month’s open thread on climate topics.

Filed Under: Climate Science, Open thread, Solutions

Unforced variations: July 2024

30 Jun 2024 by group

This month’s open thread on climate science topics.

Filed Under: Climate Science, Open thread, Solutions

Unforced variations: June 2024

1 Jun 2024 by group

This month’s open thread on climate topics. Please stay focused, minimize repetitive comments, and maintain a half-way decent level of decorum. Thanks!

Filed Under: Climate Science, Open thread, Solutions

New journal: Nature 2023?

11 May 2024 by Gavin

[Last update Dec 6, 2024] There were a number of media reports today [May 11, 2024] related to Yuan et al. (2024), for instance, New Scientist, The Guardian etc. However, this is really just the beginning of what is likely to be a bit of a cottage industry in the next few months relating to possible causes/influences on the extreme temperatures seen in 2023. So to help people keep track, we’ll maintain a list here to focus discussions. Additionally, we’ll extract out the key results (such as the reported radiative forcing) as a guide to how this will all eventually get reconciled.

[Read more…] about New journal: Nature 2023?

References

  1. T. Yuan, H. Song, L. Oreopoulos, R. Wood, H. Bian, K. Breen, M. Chin, H. Yu, D. Barahona, K. Meyer, and S. Platnick, "Abrupt reduction in shipping emission as an inadvertent geoengineering termination shock produces substantial radiative warming", Communications Earth & Environment, vol. 5, 2024. http://dx.doi.org/10.1038/s43247-024-01442-3

Filed Under: Aerosols, Climate modelling, Climate Science, El Nino, Featured Story, Instrumental Record, Oceans, Sun-earth connections Tagged With: 2023, marine shipping

Unforced Variations: May 2024

30 Apr 2024 by group

This month’s open thread on climate topics. Many eyes will be focused on whether April temperatures will be the 11th month in row of records…

Note that we have updated the data and figures from the Nenana Ice Classic and Dawson City river ice break up pools (the nominal 13th and 5th earliest break-ups (or 15th and 4th, w.r.t. to the vernal equinox) in their respective records)).

And a quick note about moderation: If your comment is a personal attack on another commenter instead of a substantive argument, it will just be deleted. As will your subsequent complaints. Ain’t nobody got time for that.

Filed Under: Climate Science, Open thread, Solutions

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