Dr. Robert Rohde Profile picture
Oct 29 5 tweets 2 min read Read on X
My initial impression misjudged the ambition of Grokipedia 0.1.

It's apparently true that many (all?) articles began with Wikipedia content, and some articles are presented with few or no changes to the Wikipedia text.

But many topics have already been largely rewritten. Image
Notably, when Grok rewrites a page, it will heavily change the sourcing.

For example, on the Grokipedia page for Boris Johnson there are currently 361 citations with URLs. Only 12 of these URLs also appear on the Wikipedia page.

Such extensive changes are common.
After noticing this, I taught a computer to compare Grokipedia and Wikipedia reference lists, which makes it easy to estimate how heavily a page has been edited.

Heavily rewritten pages appear to be far more common than I had initially expected.
In addition, when Grok is rewriting a page, it appears to only add citations as bare links (example at left).

By contrast, citations copied and retained from Wikipedia pages often still show Wikipedia's more detailed citation format (example at right). Image
Image
While Grokipedia 0.1 does retain considerable elements of its Wikipedia origins, I don't think it is really fair to think of it as a Wikipedia clone.

For better or worse, it is already its own thing, beholden to the whims of Grok.

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More from @RARohde

Nov 4
I thoroughly believe in celebrating the small victories, so here is a tiny one.

The percentage of humanity's energy system that is derived from fossil fuels, ticked down again in 2024 and is now technically at the lowest level since the 1960s, though fossil fuels still dominate. Image
This change is more noticeable if one focuses on just electricity (rather than all forms of energy), as the rise of solar and wind electricity have been grabbing market share at a rapid pace. Image
Unfortunately though, "percentage of energy" is fairly optimistic framing.

In absolute terms, natural gas and oil use have continued to grow.

Renewables are expanding faster, and thus grabbing a bigger share, but we are still very far from a clean energy transition. Image
Read 4 tweets
Sep 18
The Northern Pacific Ocean is currently smashing temperature records.

And it is reaching these levels far earlier than the current generation of climate models had expected.

A short thread 🧵 Image
Nearly the entire Northern Pacific is experiencing a strong marine heat wave, with record warmth in Japan and abnormally warm waters stretching all the way to the North American coastline.

This much extra warmth in a large ocean basin is very rare.



2/ berkeleyearth.org/august-2025-te…Image
Like most record-setting events, this warmth has multiple causes.

It's a combination of short-term weather over the last few months and global warming over decades.

But it is also probably, in part, the result of an accidental experiment in large-scale geoengineering.

3/
Read 8 tweets
Nov 28, 2024
In case anyone is wondering, about 1/2 of the 150 million tonnes of water vapor injected into the stratosphere by the extremely violent Hunga Tonga eruption (January 2022) is still there.

A fascinating natural experiment for upper atmospheric chemistry and dynamics.

🧵 Image
After the initial plume settled at ~25 km altitude, the water vapor has mostly migrated to higher levels.

Ordinarily, the tropopause (~12-15 km high) greatly limits water vapor from reaching the stratosphere, so the stratosphere is very dry (only a few ppm of water).

2/ Image
The water vapor plume began at the location of Hunga Tonga (~20° S latitude), but subsequent dynamics carried most of the water vapor higher and towards both poles.

3/ Image
Read 6 tweets
Nov 21, 2024
A new paper led by Sebastian Sippel just appeared in Nature arguing that ocean temperature measurements in the early 20th century have a cold bias.

It's a fun story illustrating the process of scientific discovery, so let me talk about it a bit. 🧵

nature.com/articles/s4158…
Before I begin, I should note that I am one of the 11 coauthors on this new paper. My contributions are actually fairly modest, and Sebastian and others deserve the lion's share of the credit for developing this work over more than 2 years.

2/
This story of scientific discovery begins, as so many do, by noticing a small discrepancy in the data.

Through most of the last 170 years, the land measurements and ocean measurements show a similar pattern of global warming, but not in the early 20th century.

3/
Read 33 tweets
Nov 12, 2024
So, what does the re-election of Donald Trump mean for climate change?

We can make some educated guesses based on his first term, his campaign, and the expressed wishes of his allies.

A few of my thoughts as a thread. 🧵
Firstly, a Trump administration obviously means abandoning any leadership role in the global fight against climate change.

He has promised to re-withdraw from the Paris Agreement on Climate Change, and possibly the UNFCCC as well.

2/
Having the USA – world's second largest annual carbon dioxide emitter – withdraw from the international process is obviously not a good thing, and will greatly undermine calls for further ambition on countering climate change.

3/ Image
Read 30 tweets
Jan 23, 2024
Heatwaves, wildfires, floods, storms...

Extreme weather gets the headlines.

For a few, climate change will arrive with life-altering violence. But for many, the early consequences of climate change will be more subtle and pernicious.

In a word: Inflation.

Let me explain...
As weather patterns change, a few will suffer greatly, but many will share some of the financial costs incurred.

Lost crops -> Higher food costs
Damaged homes -> Higher home insurance costs
Damaged infrastructure -> Higher taxes

Etc.
Money spent defending against climate-fueled disasters, or recovering from their damages, is money that we won't have to spend on other things.

In its initial stages, climate change adds an extra burden chipping away at our prosperity.
Read 6 tweets

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