Christoph Bertram

@christoph-bertram.bsky.social

950 followers 580 following 460 posts

Energy systems modeling & policy analysis - Associate Research Professor at Center for Global Sustainability, CGS @ctrglobsust.bsky.social at UMD @univofmaryland.bsky.social
German living and biking in DC, and with odd interest in basketball
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Economics 25%

Political science 22%

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Christoph Bertram @christoph-bertram.bsky.social · Sep 24

Great to see this product of work over the last half year with many great colleagues at @ctrglobsust.bsky.social launched.

What are possible high ambition emission pathways until 2035 for major countries, and their implications in the electricity sector and for fossil fuels? Find out 👇

Center for Global Sustainability @ctrglobsust.bsky.social · Sep 24

Just launched 📣
CGS's new flagship website on Country Climate Ambition offers critical insight for the Paris process through in-depth analyses and policy recommendations for major-emitting countries, as they set and seek to achieve ambitious 2035 #NDCs: www.country-ambition.cgs.umd.edu

A global map with colored dots indicating countries with analyses from a new CGS report. The text overlay reads: "Country Climate Ambition: High Ambition Pathways for National and Global Climate Goals; In the midst of the third round of the NDC cycle, the Center for Global Sustainability has launched a new flagship website on Country Climate Ambition, which provides in-depth analyses of plausible, high-ambition pathways and policy recommendations for 12 major-emitting countries towards 2035 and net-zero goals: Australia, Brazil, Canada, China, India, Indonesia, Japan, Mexico, Republic of Korea, and South Africa.

Reposted by Christoph Bertram

Chris Hayes @chrislhayes.bsky.social · 2d

Please read this.

www.mprnews.org/story/2026/0...

Renee Macklin Good’s wife says she nurtured kindness

On Wednesday, Renee Macklin Good was fatally shot by a federal ICE agent. Becca Good, her wife, shared the following statement with MPR News.

www.mprnews.org

Reposted by Christoph Bertram

Dana R. Fisher (aka the Apocalyptic Optimist) @fisherdanar.bsky.social · 3d

Peaceful protest in DC right now

Gillian Branstetter @gbbranstetter.bsky.social · 3d

Editorial in the National Catholic Reporter: "The vice president's comments justifying the death of Renee Good are a moral stain on the collective witness of our Catholic faith. His repeated attempts to blame Good for her own death are fundamentally incompatible with the Gospel."

Catholic Vice President Vance takes to social media to justify killing of Renee Good

After the tragic shooting of Renee Good at the hands of ICE, the Catholic vice president of the United States took to social media to justify the killing.

www.ncronline.org

Reposted by Christoph Bertram, Joseph Schafer, Sean P. Corcoran

Dr Yannick Veilleux-Lepage @yveilleuxlepage.bsky.social · 3d

So when authorities say “she tried to run over an officer,” that is not a neutral description. It is a claim of intent that can be used to justify lethal force after the fact.

When the state kills first and invents the threat afterward, it is not policing, it is death squad behavior. /end

Reposted by Anne Applebaum, Ben Barr, Christoph Bertram , and 8 more Anne Applebaum, Ben Barr, Christoph Bertram, Daniel W. Drezner, Smith, Rex Brynen, Claudia Diehl, Michael H. Whitworth, Mark Robinson, Lisa Tompson, Jeannette Sutton

Dr Yannick Veilleux-Lepage @yveilleuxlepage.bsky.social · 3d

🧵In my expert opinion as a researcher of vehicle ramming attacks, what has been publicly described in the video evidence does not support the claim that Renee Nicole Good was attempting a deliberate ramming attack when she was shot in Minneapolis on January 7, 2026. 1/7

Christoph Bertram @christoph-bertram.bsky.social · 4d

Absolutely not, Arvind, good choice! But spending more on oil than in the alternative case on electricity really seems a weird choice for you. This calculator comes to break-even for BEV compact SUV in Texas after less than 5 years... And you absolutely do road trips without superchargers now...

Electric vs. Gas Car Calculator: Which Is the Better Deal?

There’s no more federal subsidy. But our calculator lets you see if an E.V. might still be cheaper in the long-run.

www.nytimes.com

Christoph Bertram @christoph-bertram.bsky.social · 6d

Oh wow, I had no idea how big these claws are. Have seen a bald eagle in the wild before, but never paid attention to their claws. And crazy story about the fish, seems this could be an unpleasant timely parable here...

Christoph Bertram @christoph-bertram.bsky.social · 6d

What is the eagle holding in their left claw, do you know? (Great thread!)

Reposted by Christoph Bertram

Jessica Green @greenprofgreen.bsky.social · 6d

I just actually read the news for the first time in a week.

Do not recommend.

Reposted by Christoph Bertram

Cool Bike Art @coolbikeart1.bsky.social · 16d

❤️ every moment of this story

Experience: I cycled the length of the UK on a wooden bike

With no plans, I set off from John O’Groats to travel down south to Dover. Friends and family didn’t think I’d last a mile

www.theguardian.com

Reposted by Christoph Bertram

Richard Waite @waiterich.bsky.social · 22d

Days start getting longer on Monday

Christoph Bertram @christoph-bertram.bsky.social · 22d

For everyone traveling home from #AGU25, here something fitting to listen to, the final message dovetails nicely with one of my highlight take-home messages from this year:
"If you don’t stop, they really can’t stop you."
bsky.app/profile/agu....
And if you need a perfect nerd present:

Reposted by Christoph Bertram

David Ho @davidho.bsky.social · 22d

Summary of the news today

Wide, frontal view of a large, white marble modernist building under a clear blue sky. The façade is symmetrical, with a deep overhanging roof supported by tall, slender white columns evenly spaced across the front. Near the top of the wall, a horizontal row of narrow vertical slits forms a decorative grille. Centered across the façade is black lettering that reads on the bottom “THE JOHN F. KENNEDY MEMORIAL CENTER FOR THE PERFORMING ARTS,” with part of the text on top obscured by a black rectangle, redacting Donald Trump's name that was just added to the building. The building sits above a broad, dark platform, and the foreground shows light stone walkways and rectangular planters filled with neatly trimmed shrubs. Two small human figures stand near the base of the building.

Reposted by Flavio Lehner, Jonathan M. Gilligan, Christoph Bertram

Costa Samaras @costasamaras.com · 23d

On #AGVTV at #AGU25, Dr. Melissa Kenney and I talked about the opportunity for the entire scientific community to contribute towards climate assessment research. Submit your papers at USclimatecollection.org. youtu.be/7Kb-hfwIUxQ?...

Introducing the U.S. Climate Collection: Connecting Climate Science for a Brighter Future

YouTube video by WebsEdgeScience

youtu.be

Reposted by Nandita Sharma, Dorothy Bishop, Rosemary A. Joyce , and 7 more Nandita Sharma, Dorothy Bishop, Rosemary A. Joyce, Elizabeth Stokoe, Christoph Bertram, Cameron Campbell, Henry Farrell, Brian Keegan, Peter Gratton, Michael Gentile

Tim Dickinson @timdickinson.bsky.social · 23d

Some of these redactions are almost like modern art

Christoph Bertram @christoph-bertram.bsky.social · 23d

Shout-out to the bagpipes player welcoming attendees to the last day of #AGU25 in New Orleans

Christoph Bertram @christoph-bertram.bsky.social · 24d

Definitely going to this dance today. From 8-9pm there is a beginner lesson, which is a great way to get ready for the dance if you haven't done it before. The social dance starts at 9, and will be with live music. Walkable from #AGU25 . www.maisondupuy.com/live-music/ www.maisondupuy.com/dining/

Reposted by Paul Lehmann, Christoph Bertram

Wolf-Peter Schill @wpschill.bsky.social · 24d

How Germany generated its electricity in 2025 🇩🇪🔌↩️

💨💨💨💨💨💨💨💨💨💨
💨💨💨💨💨💨💨💨💨💨
💨☀️☀️☀️☀️☀️☀️☀️☀️☀️
☀️☀️☀️☀️☀️☀️☀️☀️🟠🟠
🟠🟠🟠🟠🟠🟠🟠🟠🟠🟠
🟠🟠🟠🟠🟤🟤🟤🟤🟤🟤
🟤🟤🟤🟤🟤🟤🟤🟤🟤🌽
🌽🌽🌽🌽🌽🌽🌽⚫⚫⚫
⚫⚫⚫🌊🌊🌊🌊🌊🇪🇺🇪🇺
🇪🇺🇪🇺💦💦💦🗑️🗑️🗑️🟢🛢️

💨 Onshore wind
☀️ Solar PV
🟠 Natural gas
🟤 Lignite
🌽 Biomass
⚫ Hard coal
🌊 Offshore wind
🇪🇺 Net imports
💦 Hydro
🗑️ Other
🟢 Bio waste
🛢️ Oil

Reposted by Garry Peterson, Christoph Bertram

Steven J. Davis @stevenjdavis.bsky.social · 24d

Thanks for noticing, Damian. In case useful, we also put together a research brief about the new paper here: drive.google.com/file/d/1ObuE...

Reposted by Katharine Hayhoe, Scott C. Doney, Ben Bond‐Lamberty , and 4 more Katharine Hayhoe, Scott C. Doney, Ben Bond‐Lamberty, Neil Pederson, Jennifer Pett‐Ridge, Christoph Bertram, Beth Tellman

Alexandra Witze @alexwitze.bsky.social · 24d

#AGU25 folks, there is a rapid- response town hall TODAY on the #NCAR dismantling at 1 pm, La Nouvelle Orleans ballroom C (per an AGU media advisory)

Reposted by Christoph Bertram

Brent Toderian @brenttoderian.bsky.social · 25d

Still not sure who did this, but it’s really good advice for cities.

Chalkboard with writing saying “Quote of the day: Don’t cling to a mistake just because you spent a long time making it.” – Unknown.

Reposted by Christoph Bertram

Center for Global Sustainability @ctrglobsust.bsky.social · 25d

This week CGS researchers are at #AGU25 to share research from our modeling and Indonesia programs. Learn more about how CGS's modeling and country climate work to support climate ambition in the NDC process: country-ambition.cgs...

A woman in formal wear stands at a podium with a laptop open while speaking to a crowd. Two people sit at a table next to her while a screen projecting news headlines takes up the right side of the photograph.

A man in a blue button up shirt stands at a podium with a computer while speaking to a crowd. Three people sit at a table next to him while a projected presentation is also positioned in front of the audience to the right of the speaker.

A man stands at a podium with a laptop and speaks to the crowd. Three people sit at a table next to the podium and look at the speaker or the projected presentation to the right of the speaker.

Christoph Bertram @christoph-bertram.bsky.social · 26d

Nice sunrise today to #AGU25 in New Orleans.
If you want to hear about the economic impact of the rise of low cost electric vehicles, go to room 271, session GC22C from 10.30am-12 today

Sunrise in New Orleans this morning, with Mississippi in front, and Crescent City connection bridge to the right

Christoph Bertram @christoph-bertram.bsky.social · 28d

Any lindy hop dancers 💃🕺 who go to #AGU25, and are on bluesky?

There seem to be 2 live music events this week, tonight (Sunday) at The Allways Lounge (45 min walking from NOMCC, see below)
and Thursday at Maison Dupuy (29 min walk, www.wwoz.org/events/1276446).
Let me know if you go!

Sunday Swing Night at the Allways Lounge

Dance lessons, then live music by some of the cities best local bands! Put on your dance shoes and come hang out where the locals do!

www.eventbrite.com

Christoph Bertram @christoph-bertram.bsky.social · 28d

Train travel also very convenient in that you can continuously post while traveling... that is a minus for the road trip option (although with an EV, the few extra minutes while stopping and charging help, I used all of those to text with friends and family...)

Yuxin Zhou @yzhouclimate.bsky.social · 28d

I’m taking the Amtrak from Atlanta to New Orleans for #AGU25! Follow my journey here, which will be 12.5 hours if there’s no delay 🚊

Christoph Bertram @christoph-bertram.bsky.social · 28d

Highlights were lunch in Knoxville with great colleague and friend David McColllum who unfortunately is not coming to #AGU25, and breakfast at a pieceful river, and the stars through the panoramic roof.
Full AGU scope covered: EV, seeing a Geminid shooting star, geological phenomena... 5/5

Cup of coffee and muffin on car window sill, with river and cloudy sunrise in background

David and Christoph in great Turkish Deli restaurant in Knoxville

Christoph Bertram @christoph-bertram.bsky.social · 28d

EV camp road trips are great, as you can heat the car without much noise while standing. My first night had lows at Natural Bridge in 20s F (-5°C), but I was comfortable and rewarded with the sunrise.
Normal charging breaks are only a bit longer (~20 min) than you anyway need for yourself...
4/n

Christoph Bertram @christoph-bertram.bsky.social · 28d

I left Friday after dinner, and will arrive at 3pm today. I did 200 miles on Friday, 600 yesterday and ~260 today. Even 600 was ok, despite many charging stops as the battery is relatively small and so winter range is only ~200 miles. The car is rented for 3 months via turo for 700$ a month 3/n

View of front seat equipped for road trips

Back of C40 with fully flat bed set-up for 6 ft (183 cm) tall person not requiring any change between driving and sleeping

Christoph Bertram @christoph-bertram.bsky.social · 28d

While 2 years ago when I did my other US multi-state EV roadtrip to Colorado in a Model 3, now you can luckily do this with any modern electric vehicle (EV) and I even managed to not rely at all on superchargers, but used a variety of charging options (right now a local one for 6ct/kWh) 2/n

Green Volvo C40 recharge twin in front of colorfull late fall trees

Christoph Bertram @christoph-bertram.bsky.social · 28d

1000 miles behind me, 53 left on my EV-camp-roadtrip from DC to New Orleans to give a talk on macroeconomic effects of EV policies at #AGU25

Interested in macro energy systems and GDP effects of climate policies -> GC22C-02 on Tuesday 10:30 CC271

Interested in EV (camp) road-tripping -> thread 1/5

Road sign saying
"Picayula 5
New Orleans 52" (miles)

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