I have the pleasure to kick off #EGU tomorrow: First session, first talk 🥳! So get up "early" on Monday morning and join CL3.2.1 at 8:30 in Room 0.49/50! I'll present how methane mitigation affects the remaining carbon budget and peak warming🌡. There are also many great talks afterwards!

National carbon budgets are smaller than commonly assumed because scientists and countries count CO₂ differently. Our new study in Nature Communications corrects for this and finds that the 1.5 °C budget shrinks by ~50%, the 2 °C budget by ~20%. Paper + data: www.nature.com/articles/s41... Thread 👇

Tracking country-level mitigation progress using NGHGI-consistent carbon budgets - Nature Communications

This study shows that aligning remaining carbon budgets with national greenhouse gas inventory accounting reduces the global 1.5 ∘C (50%) budget by  ~100 GtCO2, with possible depletion around 202...

nature.com

What becomes of the 1.5°C goal now that global warming is approaching that level?🌍🔥🌡️ In a new @science.org Policy Forum we explain how the 1.5°C goal remains a critical legal & ethical benchmark, even as the world nears and may soon exceed 1.5°C of global warming🧵1/ www.science.org/doi/10.1126/...

The pursuit of 1.5°C endures as a legal and ethical imperative in a changing world

As the world nears 1.5°C of global warming, near-term emissions reductions and adequate adaptation become ever more important to ensure a safe and livable planet for present and future generations

science.org

For those part of the #EGU bubble: Join CL3.2.1 on Tuesay at 8:30 in Room 0.31/32: Towards net zero and beyond: remaining carbon budgets, negative emissions, mitigation pathways and implications for society. I have the pleasure of kicking it off and there are many great talks afterwards!

The people who produce this Mauna Loa atmospheric CO₂ record have a lab in Hilo, Hawaiʻi, about 50 miles (80 km) from the observatory. By closing the lab, it'll be really difficult to maintain the CO₂ observations.

Scott Dance@byscottdance.com · last yr.

New: A NOAA lab in Hawaii that is connected to the longest-running observation of global greenhouse gas concentrations is slated for closure in August, according to a list of lease terminations Democratic members of Congress shared with @washingtonpost.com.

Optimist: the cup is half full Pessimist: the cup is half empty Net zero policy: No, the cup isn't empty! According to the baseline established when the cup was half full and factoring in the drink which Dave definitely owes me, we can continue drinking at current rates for the forseeable future.

Ketan Joshi@ketanjoshi.co · 2y ago

Optimist: the cup is half full Pessimist: the cup is half empty Climate communicator: Important to remember the 20 year average cup level relative to the cup target

Alice Weidel nennt Universitäten "queer-woke Kaderschmieden" und sagt: "Wir schließen alle Gender Studies und schmeißen alle diese Professoren raus". Die Naturwissenschafts-Community muss sich hier klar auf die Seite der Geistes- & Sozialwissenschaft stellen. Das ist ein Angriff auf alle. (Thread)

With all the news about the latest data showing that temperatures in 2024 were 1.6°C warmer than pre-industrial levels, many have asked what this means for the 1.5°C of the UN Paris Agreement. A short 🧵that aims to distinguish the signal from the noise (1)

In erschütternden Breaking-News-Situationen ist es immer sinnvoll, sich diesen Ratgeber vor Augen zu führen - von @onthemedia.bsky.social #Magdeburg

Very interesting post and opinion piece on climate policy. Focus on the US – but I think it's relevant for Europe, too: "... create durable economic incentives that would survive political transitions. When decarbonization becomes good business, it becomes harder to dismantle climate progress."

Costa Samaras@costasamaras.com · 2y ago

I believe a clean energy future is inevitable. It’s the path & speed that are uncertain. There are real human costs across different pathways, & CO2 emitted stays forever. @arnabdatta.bsky.social is right that “The climate movement needs to build a broader coalition”. www.nytimes.com/2024/12/08/o...

Windkraft, Wärmepumpen und E-Busse sind übrigens genauso wenig linksgrün wie elektrisches Licht und elektrisches Kochen. Sie sind schlicht am effizientesten und setzen sich deswegen über kurz oder lang ohnehin durch. Die Frage ist eigentlich nur, ob da dann überall "made in China" draufsteht.

Hat jemand eine Idee, wie es in anderen Bundesländern ausschaut, oder auch in der Schweiz?

Lukas Hammer@lukashammer.bsky.social · 2y ago

So sehen die zuständigen ÖVP Landesräte den Windkraft-Ausbau in Kärnten: 99.74 Prozent des Landesfläche soll für die Windenergie ausgeschlossen werden. In nur 7 von 132 Gemeinden an den Rändern des Bundeslands sollen überhaupt Genehmigungsverfahren möglich sein. Quelle: @kleinezeitung.at

A visual illustration of the case for geological net zero.

Softening the definition of Net Zero won’t stop global warming. As authors of the 2009 “Net Zero Papers” we call on countries and companies to recognise the need for Geological Net Zero, balancing flows of carbon into and out of the Earth’s crust. www.theguardian.com/environment/...

Countries could use nature to ‘cheat’ on net zero targets, scientists warn

By relying on natural carbon sinks such as forests and peatlands to offset emissions, governments can appear closer to goals than they actually are

theguardian.com

Here is a starter pack of scientists based in Switzerland🇨🇭active in climate/environmental research (in nat. & soc. sciences) @retoknutti.bsky.social @robertfinger.bsky.social @jksteinberger.bsky.social @rarohde.bsky.social @florianaltermatt.bsky.social @kariningold.bsky.social go.bsky.app/5cJemte

The phaseout of sulfur in marine fuels in 2020 remains a part of the explanation for the weirdness we experienced in the latter half of last year, but far from the full one. For more, check our our new post over at The Climate Brink: www.theclimatebrink.com/p/a-problema...

A problematic estimate of warming from low-sulfur marine fuels

A new paper provides a reasonable forcing estimate but errs on the global temperature response

theclimatebrink.com

Renewable energies are not the main driver of biodiversity loss. It is rather the other way round: renewables can limit climate change in order to preserve biodiversity. Cyril Brunner contextualises the trade-​offs from a scientific perspective.

Thinking climate action, biodiversity and energy supply together

ethz.ch