Seven people standing for a group photo at Georgia Tech

Nearing the end of semester two at Georgia Tech, and I am so grateful this team who does awesome science. As our group keeps growing, I will always value the work each of them - one amazing postdoc (@yangx309.bsky.social) and the spectacular GATO “undergrad army” - did to help get us off the ground.

John Seinfeld─The Atmospheric Engineer Who Cleared the Air John Seinfeld is one of the most important and influential atmospheric scientists and engineers of the last 60 years. As a young chemical engineering professor, who had just defended his thesis on the...

doi.org/10.1021/acse...

Thorough retrospective and touching tribute by John's long time collaborator, Rick Flagan (H/T @ryanward.bsky.social)

Warmer ocean is driving the Antarctic sea ice 'regime shift' Since 2016, Antarctic sea ice extent has been declining sharply – now scientists are piecing together how strong winds and warm deep water have played a part in this abrupt transition

Since 2016, Antarctic sea ice extent has been declining sharply – now scientists are piecing together how strong winds and warm deep water have played a part in this abrupt transition

Grad student Nathalie teaches President Cabrera about liquefaction

Grad student Ashleigh talks to a family about water filtration

Fantastic morning at the Atlanta Science Festival, featuring the President of Georgia Tech stopping by the @gtsciences.bsky.social Earth & Atmospheric Sciences booth to learn about earthquakes and water filtration! 🧪🔬

30+ years ago, I learned an analytical technique as a summer intern that set the course of my career. Now, I'm the only scientist in the world still using it. The scientists we don't train today because of funding and program cuts from the Trump regime are the scientists we won't have in the future.

Trump Administration Readies Plans to Dismantle Renowned Science Lab

This should be the biggest weather and climate news on your radar today.

You can send an email today to say why dismantling NCAR is a bad idea for everyone: NSF_NCAR@nsf.gov

One reason I love going to my grad school friends' weddings is because they inevitably play "We Found Love In A Hopeless Place" and the whole group on the dance floor is just like "yeah that's Caltech."

This is the second time Ito has had to step down over his ties to Epstein (first was from leading the MIT Media Lab in 2019). It’s notable he was able to get another leadership position. Really tells you something about how we as a society treat those who align themselves with sexual harassers.

Private money cannot replace public funding of science Who should pay for American science? In the current political climate, many are looking to the private sector to compensate for cuts in public funding. At the Harvard School of Public Health—particula...

My latest:

www.science.org/doi/10.1126/...
Next column will address needed guardrails for private funding of science, esp. in light of #Epstein/ #Summers etc.

Text from a sign at the Kelvingrove Museum: “Scotland and Empire Between the mid-1600s and the mid-1900s, Britain aggressively developed an overseas empire. People from all over Scotland were participants in, and drivers of, the British Empire both at home and overseas. They were politicians, enslavers, traders, colonial administrators, soldiers, missionaries, voluntary and forced migrants. Scotland's wealth grew significantly as a result of its involvement in transat antic chattel slavery. This wealth was built on exploitation of, and violence committed against, people around the world. Money from slavery, and subsequently Empire, has been invested in many areas of Scottish society, such as industry, agriculture, railways, buildings and our museums. Resources from former British colonies fuelled several of Glasgow's industries. Many of the countries that were exploited through colonisation remain economically underdeveloped as a result. Racist ideas were used to justify that exploitation, the legacies of which we are still grappling with today.”

Reconciliation begins with recognition of truths. Well done to the Kelvingrove Museum in Glasgow. 🏴󠁧󠁢󠁳󠁣󠁴󠁿

Chla phenologies and climatologies’ means grouped differently according to sea ice retreat times.

Thursday at #OSM26, I’ll be sharing our (with my team at @imas-utas.bsky.social ) work on a new approach for describing how sea ice retreat timing impact the spring bloom phenology and thus carbon cycle in the Weddell Sea by using data from @bgc-argo.bsky.social . See you at poster OB44K-0568!

Fresh off the preprint server! @maratimes.bsky.social and I show how data from the overlapping SWOT and PACE satellite missions present a step forward in our ability to observe linked biogeochemical-physical processes in the ocean.

We look forward to chatting about this with folks at #OSM2026! 🌊

US CLIVAR is looking for new panel members! If you're interested in an opportunity to contribute your expertise, expand your network, and shape the future of climate science, we encourage you to apply!

📄 Learn more and apply: usclivar.org/2026-call-us...

🗓 Application deadline: March 23, 2026

Rejecting science, Trump reverses conclusion that climate change is harming Americans The 2009 endangerment finding affirms that carbon dioxide and other greenhouse gases pose a threat to human health and welfare. Its repeal marks one of the most significant deregulatory actions in U.S. history.

Rejecting science, Trump reverses conclusion that climate change is harming Americans

There is No Scientific Justification to Revoke the Endangerment Finding The U.S. EPA's decision to repeal the Endangerment Finding will limit the government's ability to regulate emissions of carbon dioxide and other greenhouse gases under the Clean Air Act.

As I say here, there is no scientific justification to revoke the engagement finding. In fact, over the last 15+ yrs, the evidence of how climate change affects our health has only grown. Higher risk of allergies, dementia, fertility, heart disease, and death: that’s what’s on the line. @nature.org

Physical controls on heterogeneous mesopelagic biogeochemistry Communications Earth & Environment - A patchy distribution of biogeochemical properties in the ocean interior arises from the combined influence of biological and physical processes.

Surface ocean processes impact structure deep into the ocean interior. In our perspective paper, @maratimes.bsky.social, grad student Katarina Merk, and I discuss using physical perspectives to interpret subsurface biogeochemical distributions and why we as a community should care! 🌊

Italy did a nice job hosting the Olympics opening ceremony in four cities. 🔥

I propose the LA Olympics 2028 do the same: SoFi Stadium (Inglewood), Rose Bowl (Pasadena), somewhere in the Valley, and somewhere in Orange County.

Deep Inside an Antarctic Glacier, a Mission Collapses at Its Final Step

After yrs of planning & preparing, things didn't work @ the last minute. I deeply feel for these scientists. Our Antarctic project is smaller scale—but we faced continuous setbacks, from govt, Mother Nature, tech. We get so little time to do our work here; setbacks are heartbreaking #oceanography 🇦🇶🌊

Congratulations Maria!! Very proud of you. ☁️

Was reading through some last night and felt physically ill (albeit not surprised) at the amount of Caltech presence.

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Chaetoceros socialis - a colonial diatom- imaged with the lisst holo2, an underwater camera that takes 3D images of microscopic particles. The squiggly chains of individual cells grow together in balls that are actually visible by eye if you hold the seawater up to the light. Images are black and white because a laser is used to take 3D images.

The lisst -holo2, an underwater camera that takes 3D images of microscopic particles getting ready for deployment in the land aboard the RV Sikuliaq

The CTD rosette (the workhorse of oceanography) getting ready to be sent to the bottom of the ocean. The lisst holo2 is mounted on the bottom of the rosette and saves 1 image/second as the rosette descends

To study the distribution of phytoplankton🦠 and marine snow❄️, we are sending a holographic camera down on the CTD rosette to a take a 3D image every second. Then we can reconstruct bio volume and export! The most common phytoplankton on this cruise has been Chaetoceros socialis (⬇️) #oceanography 🇦🇶🐧🌊

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.

eos.org/opinions/wha...

Know an awesome undergraduate student who would benefit from the opportunity to do research in the geosciences this summer? Applications are open for the Georgia Tech Broadening Participation REU (due February 15). 🌊 ☁️ 🌍 🧪

I do look forward to reading about your experience when you return! Best wishes. 🌊

Yay, welcome Casey!! 🌊

Fair winds and following seas! 🌊

Thanks Alexis! I had a marvelous time and the Sikuliaq is ready for her first voyage to Antarctica. 🇦🇶

Science research vessel traffic jam in Punta Arenas! 🌊⛴️Currently around port are the RV Roger Revelle (USA), RSS Sir David Attenborough (UK), Icebreaker Noosfera (Ukraine), and Xue Long 2 (China). Soon we on the RV Sikuliaq (USA) will join the party!

A lullaby from the skies in the Magellan Straits last night. 🌊 ☁️