Revisiting the greatness of Earth’s great oxidation - Communications Earth & Environment Advancements in modeling, proxy integration, geochronology, and clarity on the nature of Paleoproterozoic glaciations are essential to improve understanding of the Great Oxidation Event, according to ...

New Paper! www.nature.com/articles/s43...

New Paper on Sturtian Barite!

pubs.geoscienceworld.org/gsa/geology/...

Evidence for Hadean mafic intrusions in the Nuvvuagittuq Greenstone Belt, Canada Many questions remain regarding Earth’s earliest crust owing to the rarity of Hadean (>4.03 billion-year-old) rocks and minerals. The Nuvvuagittuq Greenstone Belt (NGB) in Canada may be the only known...

www.science.org/doi/10.1126/...

Depositional Controls on ∆′17O Signatures of Sedimentary Sulfate Sulfate triple oxygen isotope signatures are most consistent with terrestrial pyrite oxidation and subsequent dilution Depositional environment must be considered in the translation of sulfate ∆′...

New Paper

Depositional Controls on ∆′17O Signatures of Sedimentary Sulfate - Crockford - 2025 - Geophysical Research Letters - Wiley Online Library agupubs.onlinelibrary.wiley.com/doi/10.1029/...

Thanks to all of the folks who helped this over the finish line.

Abstract A limited nuclear war between India and Pakistan could ignite fires large enough to emit more than 5 Tg of soot into the stratosphere. Climate model simulations have shown severe resulting climate perturbations with declines in global mean temperature by 1.8 °C and precipitation by 8%, for at least 5 y. Here we evaluate impacts for the global food system. Six harmonized state-of-the-art crop models show that global caloric production from maize, wheat, rice, and soybean falls by 11 (±1)%, 11 (±8)%, 3 (±5)%, and 17 (±2)% over 5 y. Total single-year losses of 12 (±4)% quadruple the largest observed historical anomaly and exceed impacts caused by historic droughts and volcanic eruptions. ...

www.pnas.org/doi/10.1073/...

Ocean Networks Canada hiring Chief Executive Officer in Victoria, British Columbia, Canada | LinkedIn Posted 11:14:22 PM. Ocean Networks Canada (ONC) is a world-leading, not-for-profit organization that supports ocean…See this and similar jobs on LinkedIn.

🌊🧪Job Alert!!! @oceannetworks.ca is looking for a Chief Executive Officer. Come join us at the University of Victoria 🇨🇦

www.linkedin.com/jobs/view/ch...

Interaction of metal oxyions and phosphate with carbonate green rust: Insights into Earth’s modern and ancient environments Carbonate green rust (GRCO3) is often found in suboxic and anoxic environments, and is known to be highly reactive towards dissolved metals and other …

Paper alert 🚨 Interaction of metal oxyions with carbonate green rust in seawater is out now! This is one of the few papers that investigated metal uptake with GRCO3 in seawater and conducted 1 year aging experiments! Link here: www.sciencedirect.com/science/arti... #biogeochemistry #metal #greenrust

Marine sulphate captures a Paleozoic transition to a modern terrestrial weathering environment Nature Communications - Ancient sulfate mineral compositions reflect an increase in Earth’s oxidation state ~400 million years ago, likely including an increase in atmospheric oxygen levels...

New Paper!

rdcu.be/ebWko

I am extremely honoured to have been awarded a 2025 Sloan Fellowship. A huge thank you to the Sloan foundation for their support and to my mentors for getting me here.

High metabolic zinc demand within native Amundsen and Ross sea phytoplankton communities determined by stable isotope uptake rate measurements Abstract. Zinc (Zn) is an essential micronutrient for most eukaryotic phytoplankton. Zn uptake by phytoplankton within the euphotic zone results in nutrient-like dissolved Zn (dZn) profiles with a lar...

Marine Zn limitation is a thing bg.copernicus.org/articles/21/...

Long-term carbon storage in shelf sea sediments reduced by intensive bottom trawling - Nature Geoscience Intensive bottom trawling causes a long-term reduction of organic carbon stored in seafloor sediments, suggesting a need for more effective management, according to observations and biogeochemical mod...

I'll never understand how bottom trawling is legal. 🌊

www.nature.com/articles/s41...

The history of Earth’s sulfur cycle Nature Reviews Earth & Environment - The redox transformations of sulfur mean it is a key component of global biogeochemical cycles. This Review explores the sulfur cycle over geological time,...

New Paper on the history of the sulfur cycle! can01.safelinks.protection.outlook.com?url=https%3A...

Experimental Snowball Earth Viscosity Drives the Evolution of Motile Multicellularity https://www.biorxiv.org/content/10.1101/2024.02.06.579218v1 During the 70-million-year span of the Cryogenian Snowball Earth glaciations, low ocean temperatures

Experimental Snowball Earth Viscosity Drives the Evolution of Motile Multicellularity www.biorxiv.org/content/10.1101/2024.02....

The geologic history of primary productivity The rate of primary productivity is a keystone variable in driving biogeochemical cycles today and has been throughout Earth’s past.1 For example, it …

New Paper! “The Geologic History of Primary Productivity”
With Itay Halevy, Ron Milo, Yinon Bar On and Luce Ward

www.sciencedirect.com/science/arti...

Link: drive.google.com/file/d/1KoXa...

And featured in the New York Times!

www.nytimes.com/2023/12/01/s...