Charlie Koven

It is hard to watch NSF bow so easily to their destroyers.

Vannevar Bush formed the NSF out of the US response to the fascists in WWII.

The federal government is setting itself up to be on the wrong end of the biggest lawsuit in history.

What Americans Lose If Their National Center for Atmospheric Research Is Dismantled - Eos Five ways dismantling NCAR will cost the American people, and two ways to save it.

NCAR represents what is possible when a nation chooses to invest in science as a public good, writes @carlonimbus.bsky.social of @ucs.org. #SaveNCAR eos.org/opinions/wha...

We knew the NSF letter about NCAR would come. I think this is an occasion that will require great coordination and strategical thinking. UCAR should respond as a block, coordinating a response across universities (especially in the South, and large public universities that use NCAR data a lot)

I would strongly encourage those who value the scientific & societal legacies of NCAR to offer feedback by March 13. I would expect, under present circumstances, perspectives from industry partners will be especially critical, though everyone's voice is of course important.

AGU statement on US withdrawal from climate and environmental organizations and treaties The Trump Administration’s announcement that the United States will withdraw from a multitude of international organizations and treaties that support global cooperation on climate and environmental i...

This week, the Trump Administration announced it's decision to withdraw from international organizations and treaties that support global cooperation on climate and environmental issues, a huge setback for global science. Read AGU's full statement:

news.agu.org/press-releas...

someone needs to get him on the phone, quick!

The federal govt may be burning global cooperation on climate science to the ground, but we can and are pushing back where we can. We have more than 70 US scientists currently on IPCC reports, with more to be selected this month for CDR methods report. The USAA-IPCC coalition is up for this fight.

Trump Pulls Out of Global Climate Treaty

So this is how they’ve chosen to mark the one year anniversary of the Los Angeles fires.

The deadline for DOE's SULI (Science Undergraduate Laboratory Internship) summer 2026 program is in TWO DAYS: science.osti.gov/wdts/suli/Ke... Are you an undergraduate interested in STEM? Apply!

The expected 2.5 ft above normal high tide on Saturday morning hasn't been seen since 1998 https://x.com/NWSBayArea/status/2007014464575660329

The Storytelling We Need to Rebuild Belief in Government - emptywheel As we look ahead to the new year, we need to figure out ways to tell the story of the damage Trump caused so we can hold him accountable.

The Storytelling We Need to Rebuild Belief in Government

www.emptywheel.net/2025/12/22/t...

Please read

www.forbes.com/sites/marsha...

Bravo to the #AGU25 protestor out in front of the entrance to the convention center this am

NCAR’s Mesa Lab is literally a science castle dedicated to understanding our planet in an open and collaborative way, and leading the world in that effort. We cannot let this happen.

The beautiful idea of NCAR, to improve understanding of our planet through a cooperative, shared and open intellectual team effort, is literally what has got me out of bed every morning for nearly two decades. This cannot, CANNOT be allowed to happen.

eu.usatoday.com/story/news/p...

A deeply dangerous — and blatantly retaliatory action against Colorado — by the Trump administration.

NCAR is one of the most renowned scientific facilities in the WORLD — where scientists perform cutting-edge research everyday.

We will fight this reckless directive with every legal tool we have.

They’re stealing from us. They are stealing from us and we have to put a stop to this. This cannot stand.

This wouldn't just be a national tragedy but a global one. Just mind-boggling vandalism.

This 15-story data tower in the heart of the Amazon collects vital climate data that is shared with Americans in California and across the country.

The Trump Administration can ignore reality and worsen the climate crisis, but California will never stop fighting for our future.

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We just published the Global Carbon Budget 2025, with a mix of bad news (CO2 emissions continue to grow) and encouraging news (35 countries saw emissions decline over the past decade while growing their economies).

Read the highlights in a short article:
theconversation.com/the-worlds-c...

How can we explore the future of the world's forests? Understanding the demography of their trees is key. In We took the new gen of global demographic vegetation models and held their roots to the observations. Thanks @annemarie-es.bsky.social for leading! nph.onlinelibrary.wiley.com/doi/10.1111/...

MAJOR NEWS: @GavinNewsom signed SB 79, my bill allowing more housing near public transit — rail, subway, rapid bus.

It’s a huge step for housing in California. It’ll create more homes, strengthen our transit systems & reduce traffic & carbon emissions.

Thank you, Governor!

Strong statement today from UC's Academic Senate:

Mr. Bob is a true local hero of street safety, and it is so infuriating that he was attacked in this latest instance of senseless car violence. I really hope he makes a full recovery.

flat10MIP: an emissions-driven experiment to diagnose the climate response to positive, zero and negative CO2 emissions Abstract. The proportionality between global mean temperature and cumulative emissions of CO2 predicted in Earth system models (ESMs) is the foundation of carbon budgeting frameworks. Deviations from ...

Our finalised paper on flat10MIP is finally up in GMD! This is the experimental protocol which allows for a simple, emissions-driven evaluation of TCRE, ZEC and climate reversibility in CMIP7. Thanks so much to all who ran these simulations as a proof of concept! gmd.copernicus.org/articles/18/...

I'm happy to share a paper in Science Advances that makes the case for a weak land carbon sink, drawing upon JPL and Chloris biomass time series. To close the budget with a net land sink of 0.8 Pg C/y from 2000-2019, we propose increases in the ocean sink and decreases in fossil fuel emissions.

So while the ensemble mean shows a nearly symmetric temperature response to positive and negative CO2 emissions, the quick growth of the ensemble spread implies that any scenario that invokes almost any amount of net negative emissions adds substantial uncertainty to the global temperature response.

Any deviation from the dashed line during the blue phase in the figure above implies a different response to negative than positive emissions. What's most interesting to me is how quickly the ensemble spread grows under negative emissions and then stays throughout the negative emissions phase.

Really excited to see the flat10MIP paper out! Since the preprint, we've added this new figure, showing the ESM ensemble of warming—normalized by the warming at year 100, to remove the uncertainty due to differing TCRE across models—versus cumulative CO2 emissions in the esm-flat10-cdr experiment.