Charlie Koven

243 Followers
110 Following
29 Posts
Climate scientist. I tried to get into mastodon but have since moved over to bluesky: @ckoven.bsky.social
Githubhttps://github.com/ckoven
Threadshttps://www.threads.net/@ckoven
Websitehttps://eesa.lbl.gov/profiles/charles-dunbar-koven/
Twitterhttps://twitter.com/cdkoven
brief hole in the fog
Too foggy in Berkeley this morning for a direct view of the solar eclipse that’s about to start, but at least we get to watch it real-time via its effects on the solar power supply to the electric grid! http://www.caiso.com/TodaysOutlook/Pages/supply.html
California ISO - Supply, Today's Outlook

View real-time and historical data on generation resources, including renewables, currently on the system.

"Everything Everywhere All at Once" leads the Oscar nominations! Climate prediction is so complex that it does feel like predicting everything everywhere all at once in the future.

This blog post was inspired by the movie https://metamodel.blog/posts/climate-multiverse/

Strange weather in the multiverse of climate

We cannot predict our weather universe but we can choose our emission multiverse

We are looking for a postdoc to join us at LBL, to work on exploring arctic shrub dynamics and their role in climate feedbacks using the FATES vegetation demographic model, as part of the NGEE-Arctic project. More info here: https://lbl.referrals.selectminds.com/jobs/arctic-vegetation-dynamics-postdoctoral-fellow-5434
Arctic Vegetation Dynamics Postdoctoral Fellow in Bay Area, California, United States

The Climate and Ecosystem Sciences Division (CESD)at Berkeley Lab seeks a postdoctoral researcher to combine observational synthesis, ecological...

Berkeley Lab Careers

Update: I was fired. I loved working at ORNL's Climate Change Science Institute and am devastated, but am also more determined and hopeful than ever. We have incredible power to affect change together.🌱

I still plan to continue with both research & activism, to the extent possible.

To my wonderful colleagues: My temporary affiliation is LSCE. Please use my personal rather than my work email, which I no longer have access to. Thank you for all of the support so far ♥️

https://www.nytimes.com/2023/01/10/opinion/scientist-fired-climate-change-activism.html

Opinion | I’m a Scientist Who Spoke Up About Climate Change. My Employer Fired Me.

I knew that I could face retaliation, but inaction during this critical time will have far greater consequences.

The New York Times

RT @[email protected]

Come lead an amazing team in the Earth Sciences Division at the NASA Goddard Space Flight Center! Seeking candidates to be the next Chief of the Biospheric Sciences Laboratory (Code 618, https://science.gsfc.nasa.gov/earth/biosphere/): https://www.usajobs.gov/job/697637700 @[email protected] @[email protected]

🐦🔗: https://twitter.com/carBenPoulter/status/1612509686527320071

Home Page - Biospheric Sciences Laboratory - 618

The Biospheric Sciences Laboratory studies terrestrial ecosystems and their interactions with the atmosphere using multiscale remote sensing, mathematical modeling, and advanced analytical techniques. This research allows Laboratory scientists to characterize and predict environmental changes due to natural and anthropogenic processes at local to global scales. For further information, data, research, and other resources, see Biospheric Sciences Projects.

Midway through a series of atmospheric rivers and it is peak mushroom season in Northern California.
The surprising result is that ZEC starts to show up in the temperature to cumulative emissions relationship before reaching net zero.​​ This has a lot of implications, including that TCRE and ZEC together govern peak warming levels, that if ZEC is negative, then peak warming may happen before we get to net zero, and that ZEC is a better measure of the deviation from TCRE proportionality than it is a measure of warming that occurs after reaching net zero.
The key result is that the proportionality of global warming to cumulative CO2 emissions does hold under negative emissions, even for large amounts of it. The only deviation from this TCRE proportionality is one that would also occur under net zero emissions. That small amount of committed warming or cooling is called the Zero Emissions Commitment, or ZEC.
Earlier research with idealized experiments had suggested this proportionality does not hold, but future scenarios that transition to negative emissions do show this proportionality. So we were curious what was going on. We designed an idealized experiment that avoids any large abrupt changes to emissions, which we suspected might cause the systematic deviations from proportionality.