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Christoph Bertram

@christoph-bertram.bsky.social

920 followers 560 following 420 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 Views my own .. more

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Christoph Bertram @christoph-bertram.bsky.social · 15d

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 · 15d

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.

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Christoph Bertram @christoph-bertram.bsky.social · 1d

IEA's estimate is for CO2 emissions from energy and industry to be flat (energy up 0.4%, but cement emissions down 5%)... www.iea.org/reports/glob...

CO2 Emissions – Global Energy Review 2025 – Analysis - IEA

Global Energy Review 2025 - Analysis and key findings. A report by the International Energy Agency.

www.iea.org

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Christoph Bertram @christoph-bertram.bsky.social · 1d

That's true and helpful context for readers, but that still leaves it ambiguous as to what is shown in the comparative $ figure (net or gross export value). And of course there are many structural differences to exporting oil and gas vs technology

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Christoph Bertram @christoph-bertram.bsky.social · 1d

The US also is a much larger gross exporter of crude than it is a net exporter (given imports from Canada), so it always is helpful if charts contain a note on whether the net or gross is shown

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Reposted by Christoph Bertram

Center for Global Sustainability @ctrglobsust.bsky.social · 2d

On @ddpinitiative.bsky.social's new report, @aliciaszhao.bsky.social told ICN recent US federal climate policy rollbacks have created uncertainty around delivery of US commitments under the Paris Agreement, but subnational players can drive emissions reductions: insideclimatenews.org/news/0610202...

New Report Marks a Decade of Progress, Challenges on Global Decarbonization - Inside Climate News

Extreme shifts in federal climate policy will make it hard for the U.S. to reach the Paris Agreement targets, but action by states, cities and businesses could still deliver significant emissions cuts...

insideclimatenews.org

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Reposted by Christoph Bertram, Silvia Secchi

Richard Waite @waiterich.bsky.social · 2d

Brassica oleracea / Brassica oleracea / Brassica oleracea

Three dudes dressed three very different ways - first in a more conservative suit and tie, second in a short sleeve shirt and hat, third in a pink vest and tie

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Reposted by Christoph Bertram

Center for Global Sustainability @ctrglobsust.bsky.social · 2d

New report 📣
Ten years after the #ParisAgreement, a new @ddpinitiative.bsky.social report highlights progress in climate governance and policy across 21 countries and identifies priorities for future action to accelerate national transitions in the coming decade: ddpinitiative.org/ddp-report-2...

Illustration of people drawing pathways in blue, red, and purple with the text "A Decade of National Climate ACtion: Stocktake And The Road Ahead"

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

Wow, amazed to see that they still are so popular. Are so many people just indiferrent to the owner's politics, or even supportive? Or do you think it's more that they still offer the most convenient charging experience, especially for road trips through Europe?

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Reposted by Christoph Bertram

Richard Waite @waiterich.bsky.social · 8d

RIP Jane Goodall. As someone who learned about her work in elementary school, it was pretty cool as an adult to see her in her 80s on stage at the Global Climate Action Summit in 2018, talking about the advantages of eating more plants/less meat for animals, our health, nature, and the climate. 💚

Jane Goodall on stage being interviewed at the Global Climate Action Summit in California in Sept 2018. Behind the people is a scene of a lush forest.

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Reposted by Christoph Bertram

Andreas Sieber @andreassieber.bsky.social · 8d

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Lots of new climate targets aka #NDCs coming in this week, many having BAU based targets, here the overview:

🎯 Russia: GHG reduction of 65-67% by 2035 (vs 1990 )
🎯 Bangladesh: GHG reduction of 20.31% by 2035 (vs business-as-usual)
🎯 Mauritius: GHG reduction of 40% by 2035 (vs BAU)

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Reposted by Christoph Bertram

tigard-stripes.bsky.social @tigard-stripes.bsky.social · 8d

Buy the Ebikes! 🚲⚡️

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Christoph Bertram @christoph-bertram.bsky.social · 8d

That can be the case, especially if you have lots of HPC or other high demand lab stuff on campus, but if it is more mostly buildings with offices and seminar rooms that need power, heat and coolness, then it can also be more than 30% or higher, especially after tackling efficiency

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Christoph Bertram @christoph-bertram.bsky.social · 9d

How cold? So cold that energy demand in winter is > summer? In any case, solar on-site (particularly on parking lots, but also larger buildings) can make a meaningful contribution, but the economics of course improve a lot if summer demand > winter demand (as is the case here at UMD).

Carbon Footprint | Office of Sustainability

sustainingprogress.umd.edu

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Reposted by Christoph Bertram

Carbon Brief @carbonbrief.org · 9d

Thank you to everyone who joined our webinar on China’s new climate pledge🎙️

Thanks also to our panelists: Li Shuo @laurimyllyvirta.bsky.social @rynacui.bsky.social @anikanpatel.carbonbrief.org @drsimevans.carbonbrief.org

If you missed the webinar, you can watch it here ⬇️
buff.ly/zUSLhUp

Webinar: Experts discuss what China's new climate pledge means for the world - Carbon Brief

Carbon Brief hosts webinar with China climate policy experts to discuss assessments of what the NDC means for China’s emissions pathway.

buff.ly

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Christoph Bertram @christoph-bertram.bsky.social · 10d

Would be interesting to see a survey in US: "Do you think that electric vehicle sales as share of total vehicle sales are higher in Thailand or the US?"
I have the impression that many Americans are not aware of how the US is far behind in a clearly superior technology that will dominate the future

LeRaffl @leraffl.bsky.social · 12d

🇹🇭 Thailand - August 25 - BEV Trajectory

20.8% BEV
1.2% PHEV
78.0% ICE (of which 11.7%p were HEV)

Trailing 12 months are:
15.9% BEV
2.7% PHEV
81.4% ICE (of which 20.5%p were HEV)

Graphs are available in the Gallery: leraffl.github.io/LeRaffl-Gall...

Reposted by Christoph Bertram

Alaa Al Khourdajie @dralaaclimate.bsky.social · 10d

New working paper out: "Four scenarios for an @ipcc.bsky.social navigating Artificial Intelligence"

Led by @hollyjeanbuck.bsky.social, with @shinasayama.bsky.social and Oliver Geden

Thread 🧵

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Reposted by Glen P. Peters, Christoph Bertram

Hannah Daly @hannahdaly.ie · 10d

I'm on my way to Vienna to participate in the first Overshoot Conference, at IIASA.

I'll present in the theme of "Highest possible mitigation ambition under overshoot":
"Towards a framework for aligning national mitigation scenarios with 1.5°C in an era of overshoot" with @roisinmoriarty.com

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Christoph Bertram @christoph-bertram.bsky.social · 11d

Germany lost both the exports to China, but also a significant share of exports to third countries to competition by Chinese EV manufacturers, so Ingolstadt would probably be in a much better situation with a faster and more ambitious green transition. Allowing Audi to stick to ICEs instead...

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Reposted by Gavin A. Schmidt, Matthias Cuntz, Christopher Wright , and 1 more Gavin A. Schmidt, Matthias Cuntz, Christopher Wright, Christoph Bertram

Peter Gleick @petergleick.bsky.social · 11d

Setting aside the absolute scientific idiocy of the specifics here, reflect for just a moment on the fact that there's a list of "banned words" at all.
That's fascism and unAmerican.

"Energy Dept adds #climatechange and emissions to list of banned words"

subscriber.politicopro.com/article/2025...

POLITICO Pro: Energy Dept. adds ‘climate change’ and ‘emissions’ to banned words list

It is the latest in a series of Trump administration efforts to dispute, silence or downplay climate change.

subscriber.politicopro.com

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Reposted by Christoph Bertram

LeRaffl @leraffl.bsky.social · 12d

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Christoph Bertram @christoph-bertram.bsky.social · 12d

Two years after the Nazis came to power, they changed the name of the 'Reichswehrminister' (Minister of Defense) to 'Reichskriegsminister' (Minister of War) and even before that had all military personnel pledge an oath to Hitler instead of to the constitution
en.m.wikipedia.org/wiki/Werner_...

Reposted by Christoph Bertram

Richard Waite @waiterich.bsky.social · 12d

“Maryland led all states with a 49% reduction in per capita CO2 emissions from energy consumption between 2005 and 2023, as the state’s total CO2 emissions fell 43% and population grew 11%.”

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Christoph Bertram @christoph-bertram.bsky.social · 12d

My fantastic colleague @rynacui.bsky.social is now also on bluesky!
If you miss the webinar on Monday, or want to read our analysis on High Ambition for 2035 for China and 11 other large emitters (currently incorporating the new China targets):
www.country-ambition.cgs.umd.edu/

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Reposted by Christoph Bertram, Jessica Green

Todd Tucker @toddntucker.com · 12d

Join me and @greenprofgreen.bsky.social on Tuesday at 1 pm ET to discuss her new book, "Existential Politics: Why Global Climate Institutions Are Failing and How to Fix Them."
events.zoom.us/ev/AtXUfZzc-...

Roosevelt Events

events.zoom.us

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Reposted by Rosemary A. Joyce, Christoph Bertram, Smith , and 5 more Rosemary A. Joyce, Christoph Bertram, Smith, Laurent Pech, Daxton R. Stewart, Aviel Roshwald, Olúfẹ́mi Táíwò, Nathan P. Kalmoe

Texas Tribune @texastribune.org · 13d

Breaking: Texas Tech chancellor limits academic mentions of transgender and nonbinary identities at five universities.

Texas Tech chancellor limits academic mentions of transgender and nonbinary identities at five universities

Advocacy groups say the new state law, presidential executive order and gubernatorial letter Tedd Mitchell cited do not prohibit classroom discussions of particular LGBTQ+ identities.

www.texastribune.org

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Reposted by Christoph Bertram

natehultman.bsky.social @natehultman.bsky.social · 14d

For more on how to understand a good target, visit @ctrglobsust.bsky.social’s new website on country climate ambition: www.country-ambition.cgs.umd.edu

Homepage | CGS

www.country-ambition.cgs.umd.edu

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Reposted by Christoph Bertram

natehultman.bsky.social @natehultman.bsky.social · 14d

It was an honor to attend the #UNGA Climate Summit and hear from UN Secy. Gen. António Guterres and @lulaoficialbluesky.bsky.social about the importance of #ClimateAction as countries finalize their #NDCs.

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Reposted by Christoph Bertram

Carbon Brief @carbonbrief.org · 14d

🎙️Carbon Brief is hosting a free webinar in which experts will discuss China’s first-ever pledge to cut its emissions

🗓️ When? Monday 29 September at 15:00 (BST)

Register here ➡️ buff.ly/lw5cBdZ

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Christoph Bertram @christoph-bertram.bsky.social · 14d

The article is better and more nuanced then the headline. What it omits however is that the announcement also included the "striving to do better", which is an acknowledgement of the fact that faster and deeper reductions in Chinaare also doable (beyond those abroad you rightly mention)

Christoph Bertram @christoph-bertram.bsky.social · 14d

The worst part of the announcement is not shown in this figure though: as the reduction is expressed relative to a non-specified peak level, China would be in compliance with the target even if emissions increase further (say 8%) until 2029, and then only go back to 2024 levels in 2035

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Reposted by Christoph Bertram

Thomas Zimmer @thomaszimmer.bsky.social · 14d

ICYMI yesterday: I need your help

I re-launched my newsletter at a new platform called “Steady” – and most importantly, I officially started my new life as a full-time independent writer.

I am extremely excited this moment has finally come. And I am utterly terrified.

Onward. Forward. Steady.

Things have really changed. Now I need your help.

steady.page

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