Dr. Robert Rohde Profile picture
Oct 29, 2025 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

Jun 24
Yesterday, the weather station at the Bordeaux airport set an all-time record for the second day in a row, reaching 42.5 °C (108.5 °F)

A small thread on the French heatwave. 🧵 Image
Bordeaux is near the epicenter of the current heatwave, but record-breaking temperatures have been widespread in France.

This is not-at-all just a typical summer.



2/
In Bordeaux, the temperature of the warmest June day has been screaming higher.

The long-term trend has increased by ~6 °C (11 °F) over the last 50 years, far faster than the ~1.15 °C (2.1 °F) rise in global average temperatures.

3/ Image
Read 14 tweets
Jun 8
A powerful El Niño Event is expected to develop during 2026.

How powerful? Well the seasonal forecasting models are currently all over the place.

So, somewhere between a Top 10 event in modern history and super-bonkers extreme crazy land. 🤔 Image
The simple reality is that seasonal forecasting is hard (and relatively new), and many of these models are just going to be wrong.

I'm expecting a strong El Niño event, and plan to follow the forecast updates closely, but remain very skeptical of the extreme upper end models.
I'm sure it's an exciting time for the seasonal forecast modelers. They get to test their work against highly unusual conditions, and hopefully improve in the process.

But for those of us who just want to know what to expect, confidence is still low.
Read 5 tweets
Jun 5
Does El Niño forecasting have their own version of a "hot models" problem?

There are currently 13 seasonal forecast ensembles used to predict future El Niño / La Niña.

Diversity is good, but there remains broad disagreement among them, with some suggesting all-time records.

🧵 Image
First, let's just note that essentially every model predicts El Niño is coming. The uncertainty is about intensity.

Some have a moderate event, many have a strong or very strong event, and a few have a record-smashing event.

2/
If you are looking at just one El Niño forecasting model you are probably not getting the full picture.

The spread amongst models is considerably greater than the spread reported by most individual models.

3/
Read 11 tweets
Apr 11
We need to talk a bit about how utterly absurd the March heatwave was in the USA.

This heatwave would have been impossible without a boost from climate change, but even with climate change it remains a deeply unlikely event.

A thread looking at some of the numbers.

🧵 Image
To begin, let's look at monthly mean temperature.

The March average temperature across the Western USA was about +11.6 °F (+6.4 °C) warmer than the mid-20th century average.

That's an absurd 3.6 °F (2.0 °C) higher than the previous record.

2/ Image
Since the mid-20th century, the March average temperatures in the Western USA have warmed ~4 °F (2.2 °C).

Without that boost provided by global warming, a March heatwave this severe likely would have been impossible.

3/
Read 28 tweets
Nov 4, 2025
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, 2025
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

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