Achim Dohmen

Achim Dohmen

@achimdohmen.bsky.social

Skeptiker, Suchmaschinen-Autodidakt, trotz absolutem Gehör nur mittelmäßiger Zuhörer

105 followers283 following1.2K posts

Achim Dohmen reposted

Glen Peters
@glenpeters.bsky.social

Replying to @glenpeters.bsky.social

It may be that the new generation of scenarios don't even return to 1.5C, noting there is uncertainty in climate model projections. The scenarios that may be consistent with 1.5C with overshoot require rapid emission reductions, sort of happening immediately! Otherwise they are fantasy! 4/

Achim Dohmen
@achimdohmen.bsky.social

Daumen drücken für einen zu warmen Winter und das sich Gaspreise und Verbrauch so entwickeln wie während des letzten großen El Nino 2015/2016. Sonst kann es in D übel werden.

Malte Kreutzfeldt@mkreutzfeldt.bsky.social

Kurzfassung: Die Pipelines aus Norwegen waren im letzten Winter voll ausgelastet. Bei den bestehenden LNG-Terminals gab es noch etwas Luft, aber auch wenn die Auslastung im mächszen Winter auf 80 % stiege, würde das am Speicherbefarf wenig ändern. (1/2)

Achim Dohmen
@achimdohmen.bsky.social

US AI-Konzerne: PR - Wer kann KI Modelle und Agenten so bauen, dass er die meisten IT-Systeme anderer Organisationen hackt. Chinesen: sind leise und machen einfach

Reuters@reuters.com

Anthropic says Claude AI hacked three companies during cyber tests reut.rs/4yP1TnF

reut.rsAnthropic says Claude AI hacked three companies during cyber testsAnthropic said on Thursday its AI model Claude hacked into the systems of three companies during testing after a ​configuration error gave it internet access, days after rival OpenAI disclosed a rogue-agent episode involving ‌AI firm Hugging Face.
Achim Dohmen
@achimdohmen.bsky.social

Zum Thema RCP8.5 ist tot: www.theclimatebrink.com/p/on-the-dea...

theclimatebrink.comOn the death of RCP8.5We should celebrate progress, but not overstate it
Glen Peters@glenpeters.bsky.social

Read more in this great post by @hausfath.bsky.social, with some input and inspiration from Piers Forster and myself. www.theclimatebrink.com/p/on-the-dea... More thoughts to come later... 5/5

theclimatebrink.comOn the death of RCP8.5We should celebrate progress, but not overstate it

Achim Dohmen reposted

Michael Liebreich
@mliebreich.bsky.social

Green hydrogen as a hedge against gas price shocks? Puh-lease. European gas prices exceeded a €5/kg hydrogen-price-equivalent for only 141 days after Russia's invasion of Ukraine, and a €10/kg price for just 13 days. You don't pay €5-10/kg for 25 years for fear of a spike lasting a few weeks.

Achim Dohmen reposted

Glen Peters
@glenpeters.bsky.social

Replying to @glenpeters.bsky.social

Why did GHG emissions rise? 50% of the increase was from land-use change, primarily due to more fires during El Niño. We expect this to drop in 2025. LUC is also very uncertain. All other main regions, except EU27, with rising emissions in 2024. 2/

Achim Dohmen reposted

Zeke Hausfather
@zekehausfather.com

Our new paper updating key metrics in the IPCC is now out, and the news is grim: ⬆️ Human induced warming now at 1.36C ⬆️ Rate of warming now 0.27C / decade ⬆️ Sharp increase in Earth's energy imbalance ⬇️ Remaining 1.5C carbon budget only 130 GtCO2 essd.copernicus.org/...

essd.copernicus.orgIndicators of Global Climate Change 2024: annual update of key indicators of the state of the climate system and human influenceAbstract. In a rapidly changing climate, evidence-based decision-making benefits from up-to-date and timely information. Here we compile monitoring datasets (published at https://doi.org/10.5281/zenodo.15639576; Smith et al., 2025a) to produce updated estimates for key indicators of the state of the climate system: net emissions of greenhouse gases and short-lived climate forcers, greenhouse gas concentrations, radiative forcing, the Earth's energy imbalance, surface temperature changes, warming attributed to human activities, the remaining carbon budget, and estimates of global temperature extremes. This year, we additionally include indicators for sea-level rise and land precipitation change. We follow methods as closely as possible to those used in the IPCC Sixth Assessment Report (AR6) Working Group One report. The indicators show that human activities are increasing the Earth's energy imbalance and driving faster sea-level rise compared to the AR6 assessment. For the 2015–2024 decade average, observed warming relative to 1850–1900 was 1.24 [1.11 to 1.35] °C, of which 1.22 [1.0 to 1.5] °C was human-induced. The 2024-observed best estimate of global surface temperature (1.52 °C) is well above the best estimate of human-caused warming (1.36 °C). However, the 2024 observed warming can still be regarded as a typical year, considering the human-induced warming level and the state of internal variability associated with the phase of El Niño and Atlantic variability. Human-induced warming has been increasing at a rate that is unprecedented in the instrumental record, reaching 0.27 [0.2–0.4] °C per decade over 2015–2024. This high rate of warming is caused by a combination of greenhouse gas emissions being at an all-time high of 53.6±5.2 Gt CO2e yr−1 over the last decade (2014–2023), as well as reductions in the strength of aerosol cooling. Despite this, there is evidence that the rate of increase in CO2 emissions over the last decade has slowed compared to the 2000s, and depending on societal choices, a continued series of these annual updates over the critical 2020s decade could track decreases or increases in the rate of the climatic changes presented here.

Achim Dohmen reposted

Glen Peters
@glenpeters.bsky.social

Replying to @glenpeters.bsky.social

Total CO2 emissions are still rising. It is necessary to reduce emissions drastically to zero to stop the temperature increasing. To keep below 1.5C is no longer feasible, but that does not mean give up, but try harder. 7/7

Achim Dohmen reposted

Glen Peters
@glenpeters.bsky.social

Replying to @glenpeters.bsky.social

EU: * Long-term decline of coal: successful EU policy * Decline in natural gas in recent years: Energy prices, Russian aggression * Nuclear power turmoil (France, Germany, Belgium) * Hydropower swings: droughts *Strong renewables growth 5/

Achim Dohmen reposted

Glen Peters
@glenpeters.bsky.social

Replying to @glenpeters.bsky.social

Those were the top-4 fossil CO2 emitters in terms of aggregated emissions. Each country has its own story... Just because they emit less, does not mean they are not important! 6/

Achim Dohmen reposted

Michael Liebreich
@mliebreich.bsky.social

Over the years, quite a few of you have asked me explain the #HydrogenSoufflé thing specifically to Germans, who seem weirdly (and expensively) enamoured of the #HydrogenEconomy. So here's me, doing my best... in German. And no it's not AI, it really is me :-) www.youtube.com/watch?v=KJo3...

youtube.comMilliardengrab Wasserstoff? 😤 Wer BEZAHLT das!? Michael Liebreich | H2-Strategie | Geladen PodcastYouTube video by Geladen Batteriepodcast

You are up to date.