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The IPCC Sixth Assessment Report

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Climate scientists are inordinately excited by the release of a new IPCC report (truth be told, that’s a bit odd – It’s a bit like bringing your end-of-(seven)-year project home and waiting anxiously to see how well it will be received). So, in an uncharacteristically enthusiastic burst of effort, we have a whole suite of posts on the report for you to read.

If/when we add some more commentary as we digest the details and we see how the report is being discussed, we’ll link it from here. Feel free to discuss general issues with the report in the comments here, and feel free to suggest further deep dives we might pursue.

Realclimate redesign

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After more than 15 years with basically the same layout, the Realclimate website – while still functional – has become increasing anachronistic both in appearance and ‘under the hood’. In order to take advantage of more up to date web-site designs and new features that have been developed since the early 2000s (!), we need to upgrade the site, and while we are at it, update the theme and design, while maintaining an aesthetic link to the original.

With this post, we can reveal the new layout.

The differences are not related to content but to appearance – all of the material is still here – but the new layout is much fresher and includes much better support for people reading the site on their phones or iPads. We are using larger typefaces, cleaner menus and a more content-focused presentation for posts.

All of this is intended to improve the reader/commenter experience, but it’s inevitable that we have missed some aspects and/or some of the design features may be suboptimal for some. We will endeavor to fix any issues or problems that you find. So please comment below if you like it or hate it, if you find anything that’s broken or if you have any specific requests for tweaks. We’ll try and iterate over the next few days to get it right.

Thanks!

Unforced Variations: Aug 2021

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This month is IPCC month – the Sixth Assessment Report from Working Group 1 is out on Monday August 9. We’ll have some detailed comments once it’s out, but in the meantime, feel free to speculate widely (always considering that IPCC is restricted to assessing existing literature…).

Open thread – please stick to climate science topics.

Rapid attribution of PNW heatwave

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Summary: It was almost impossible for the temperatures seen recently in the Pacific North West heatwave to have occurred without global warming. And only improbable with it.

It’s been clear for at least a decade that global warming has been in general increasing the intensity of heat waves, with clear trends in observed maximum temperatures that match what climate models have been predicting. For the specific situation in the Pacific NorthWest at the end of June, we now have the first attribution analysis from the World Weather Attribution group – a consortium of climate experts from around the world working on extreme event attribution. Their preprint (Philip et al.) is available here.

Trends in Tmax globally
[Read more…] about Rapid attribution of PNW heatwave

Forced Responses: May 2021

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A bimonthly open thread on climate solutions. Perhaps unsurprisingly this is always the most contentious comment thread on the site, but please try and be constructive and avoid going off on wild tangents.