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Dr. Robert Rohde Profile picture
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3 May, 4 tweets, 3 min read
Data visualization of the changes in land use types over last 12,000 years according to a recent paper by @erleellis and colleagues:

pnas.org/content/118/17…

Human actions have been transforming the Earth's surface for thousands of years.
A selection of time slices from the animation to further emphasize the shifts from uninhabited and sparsely inhabited land use type to more heavily populated and agricultural land uses.
The authors of the paper (with @EarthOutreach) have previously provided an online mapping tool for exploring the changes over time on local and regional scales.

anthroecology.org/anthromes/12kd…
Lastly, I want to mention that @JacquelynGill, one of the coauthors of the paper cited above, wrote a Twitter thread discussing their results.

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More from @RARohde

Dr. Robert Rohde Profile picture
19 Mar
THREAD) The climate scientists consensus guide for who to follow on Twitter.

Need more climate information in your twitter feed?
Many suggestions are available in this thread

#FollowFriday #FF
There are literally thousands of scientists working on climate related issues who have joined Twitter.

@KHayhoe has created an excellent list of 3,148 such scientists, and if you want to get them all, you can follow her list directly.

twitter.com/i/lists/105306…

2/
The most popular, i.e. most followed, scientists working on climate issues are:

@KHayhoe
@MichaelEMann
@picazomario (mostly in Spanish)
@JacquelynGill
@PeterGleick
@hood_naturalist
@ClimateHuman
@KavehMadani (often in Farsi)
@ayanaeliza
@rahmstorf (often in German)

3/
Read 14 tweets
Dr. Robert Rohde Profile picture
16 Mar
A year ago, when COVID was just taking off in many places, I never expected that China would actually end up as one of the least affected countries.
China's official COVID death toll stands at 4,636.

That's probably an undercount for several reasons, but even if the truth were twice as high it would still be a very low rate of death compared to most Western countries.
What China appears to have achieved early in the pandemic was the complete elimination of local transmission.

Few countries seriously tried to do this, and even fewer succeeded.
Read 6 tweets
Dr. Robert Rohde Profile picture
6 Dec 20
A bit of Sunday Twitter navel gazing.

Plot of scientists working on climate issues by their number of tweets and followers.

Verified accounts are circled. A somewhat random selection of extremal accounts have been labeled. Image
For the above plot, I used the set of scientists working on climate issues from @KHayhoe's excellent list.

twitter.com/i/lists/105306…
A few quick summary stats

3,135 Scientists

Number of followers

Median: 719
Mean: 2,066
Max: 171,387

Number of tweets

Median: 1,239
Mean: 4,649
Max: 307,513

In general, accounts with more tweets tend to have more followers. ~2/3 of accounts have more tweets than followers.
Read 8 tweets
Dr. Robert Rohde Profile picture
4 Dec 20
THREAD) Climate scientists often don’t get as much recognition as they deserve.

For this #FollowFriday, I’ve prepared a list of 13 professional climate scientists, with at least 20,000 followers each, but which @Twitter has not yet @Verified.

Maybe change that @TwitterSupport?
First up, Professor Stefan Rahmstrof (@rahmstorf) is Head of Earth System Analysis at the Potsdam Institute for Climate Impact Research.

He is a leading climate scientist, 2017 winner of the @theAGU's Climate Communication Prize, and an expert on the oceans. 2/
Dr. Kate Marvel (@DrKateMarvel) of Columbia University & NASA’s Goddard Institute for Space Science.

She develops and evaluates climate models, while also frequently writing & speaking about climate change. One of @TIME’s "15 Women Leading the Fight Against Climate Change". 3/
Read 18 tweets
Dr. Robert Rohde Profile picture
19 May 20
If 2020 ends up as a new record warm year, and it might, then a significant component of that will have been the incredibly warm start of the year that has just occurred in Asia.

1/
January to April, Russia averaged nearly +6.0 °C (+11 °F) above historical norms. That's one hell of a "mild winter".

That's not only a new record anomaly for Russia. That's the largest January to April anomaly ever seen in any country's national average.

2/
In what may be a sign of worse to come later this year, the exceptionally warm winter has been followed by unusually large early season wildfires in Russia.

washingtonpost.com/world/europe/w…

3/
Read 5 tweets
Dr. Robert Rohde Profile picture
8 Apr 20
IHME has updated their US states COVID-19 model again.

Their new best estimate for US total deaths during the first wave has fallen to 60,000 (from 83,000 two days earlier).

healthdata.org/covid
As with the last release, they expect all US states will see their initial peak at some time during April, though with some earlier than others.

A few of these have been reshuffled, with a slight overall shift towards earlier peaks.
Because the IHME model is trained on a lagging indicator, i.e. per state deaths, I haven't been surprised to see their total projected deaths be revised downward (93,000 -> 82,000 -> 60,000), and wouldn't be surprised if it goes somewhat lower still.
Read 4 tweets

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