25 Comments
Sep 25, 2023Liked by Zeke Hausfather

Nice job. I appreciate the reference and links to the different datasets. Maybe sometime you can give us an overview of their origin. I hope this is somewhat of an anomalous spike.

A couple graphs are labeled Heamap vs Heatmap, just FYI.

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Hi. Thanks for these visualizations. To clarify up front I am a climate activist and natural resource scientist. My question is about the 3rd image 'Heatmap of daily global mean surface temperature anomalies back to 1958 relative to the 1991-2020 baseline period.' I'm wondering how you chose the baseline period in general and why you chose 1991-2020 for this visualization. This choice of baseline is the basis for everything in the image, so as feedback, I think it would be good to explain this to your readers as well:-) Thanks in advance for your reply! Appreciate your work!

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I'm interested in the potential that the next several years might be cooler ("regression to the mean"), just as the years after 1998 were quite a bit cooler than in 1998. Some of the graphic images tend to illustrate this with regard to the post 1998 period, based on color coding. This gets at whether 2023 is "typically anomalous" as in the 1998-2008 period, or whether something more serious is happening. It would be nice to see a more mathematical analysis that sets up statistical, hypothesis testing. Thoughts?

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These visualizations really hammer the point home. You could really feel the difference here in New York this summer. Definitely concerning that 2024 could be even worse given El Niño…

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"Somewhat surprisingly, the increase in global temperatures DUE TO? human-driven warming is clearly..."

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I really appreciate these posts. I learn so much each time. Thank you. However, full disclosure ... I am not a climate scientist, so my question may be stupid.

I am interested in the last graph that represents 'Global monthly mean surface temperatures'. How is it that the period between October and April is so much lower that the middle if the year, when the southern hemisphere is deep in our summer season and temperatures down here soar? Is it just there is less landmass?? Is it that the north hemisphere cold shifts the dial towards a cool global mean?

I ask because in Australia we're are facing at least a few summers that will eclipse the European heat registered this year, yet this appears lost in the graph.

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I wonder if 2024 temperature anomalies will be even higher than 2023... Looks September will be close to the record from February 2016! Highest monthly anomaly in ERA5. Hard to imagine hotter than this, but that might be where we're heading❗

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Hi Zeke and others. I’m new here. Does anyone understand the substantial discontinuity between the last few months(?) data and the Before Times? What are the possible causes?

I’m not an engineer, but it seems to me this system is running substantially outside normal parameters right now. Either it’s received a brief hard push and will gradually return to quasi-normal, or something new is in play and we don’t know what’s next.

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no discussion of climate chgne and co2 is complete without recognising the biggest emitters- the political/industrial elite 1% flying around pretending to save it by being responsible for 25% and the Pentagon - maybe the US could try negotiation instead of provoking proxy wars.

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ZH, thanks again for preparing an informative presentation. What I am going to say is independent of your analyses: My hope is that eventually the "climate research community" will agree upon one reanalysis model, globally and for each hemisphere.. Again, thanks. zf

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