John J. Cullen
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johncullenocean.bsky.social
John J. Cullen
@johncullenocean.bsky.social
Professor Emeritus in Oceanography, Dalhousie University. 🇨🇦🧪🌊 I've spent a long time trying to understand and explain how the ocean works.
Reposted by John J. Cullen
Her sister wrote my favorite essay about her. She points out that RF would have been famous even if she'd never looked at DNA

www.thelancet.com/journals/lan...
Remembering my sister Rosalind Franklin
Rosalind Franklin died of ovarian cancer in 1958 aged 37 years. Sympathy and feminism have combined to give us her familiar image as a downtrodden woman scientist, brilliant but neglected, a heroine t...
www.thelancet.com
November 7, 2025 at 11:20 PM
The question about additionality stands, but more importantly, what about the foundational assumptions: 1) All of the carbon in oyster biomass is sequestered from the atmosphere for decades (false - it is respired), and 2) All of the sedimented organic carbon is permanently buried (evidence?).
September 21, 2025 at 2:08 PM
Reposted by John J. Cullen
I was in the process of hiring a postdoc, so this severely affects her career because now she has to look for something else. It also means I can't pay my existing people, can't buy supplies for the lab, and can't travel. Every NSF-funded researcher will be in the same boat soon.
May 2, 2025 at 8:29 AM
Reposted by John J. Cullen
The Act prohibits actions that “harass, harm, pursue, hunt, shoot, wound, kill, trap, capture, or collect” endangered species. Right now, “harm” includes damage to a species’ habitat—but the Trump administration is attempting to strip habitat destruction from that definition.
April 18, 2025 at 1:26 PM
Thanks for the heads-up, Clark. A keen student could learn a lot by modelling the interactions between ambient irradiance spectra and LDR sensor spectral response in different water types through the open ocean. Could be a good publication!

aslopubs.onlinelibrary.wiley.com/doi/full/10....
aslopubs.onlinelibrary.wiley.com
March 22, 2025 at 2:25 PM