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Dr. Aaron Wolf’s research interests include planetary science, geochemistry, mineral physics, and statistical analysis. His work primarily focuses on understanding the role of silicate melts in driving the formation and evolution of rocky planets.

#Geochemistry #Space #Science #SETI #NotJustAliens

Text: #notjustaliens. Aaron Wolf, Geochemistry / Statistics. Background: Starry night sky. Inset: Photo of Aaron Wolf in front of a large rock face.

Text: Dr. Aaron Wolf’s research interests include planetary science, geochemistry, mineral physics, and statistical analysis. His work primarily focuses on understanding the role of silicate melts in driving the formation and evolution of rocky planets. Background: Starry night sky with graphics of a star and exoplanets in front of it.

Text: He employs various computational methods to explore these processes, including thermodynamic model building and thermo- and geo-dynamic simulation. Check out his open-source project for thermodynamic modeling of rocky planets at www.enki-portal.org. Background: Starry night sky with graphics of a star and exoplanets.

🚨Job Alert! 🚨 Low-Temperature and/or Environmental #Geochemistry - Missouri State Univ #geology
https://jobs.missouristate.edu/postings/83379

'Geochemical re-evaluation supports cosmic impact rather than volcanism at Younger Dryas onset, Hall’s Cave, Texas: Reply to Sun et al. 2020' - a recent article published in "Airbursts and Cratering Impacts" on #ScienceOpen 📄🔗 https://www.scienceopen.com/hosted-document?doi=10.14293/ACI.2025.0007

#YoungerDryas #ImpactHypothesis #CosmicImpact #Geochemistry

#karst #caves #speleology #geology #hydrogeology #geochemistry #cavediving

Research Associate (PhD position) in #mineralogy at University of Hamburg #Germany #geochemistry #archaeology

Research on "thermally activated structural and chemical changes in phyllosilicates typical of clays, to develop a strategy for tracing the firing history and initial phase composition of cuneiform clay tablets (the earliest written artifacts in human civilizations)."

https://www.uni-hamburg.de/en/stellenangebote/ausschreibung.html?jobID=de59065db7ec35d77ab6b51d14dd82d0968b0b7b

Had fun tonight introducing my son, 10 years old, to advection-diffusion modeling. This is for porewaters in Antarctic subglacial lake sediment. Advection is the movement of the porewaters (water between grains of sediment) through the sediment, and diffusion is the spreading out of chemicals dissolved in porewaters from high concentrations to low concentrations. I told him to pick some times of the sediment being in contact with seawater versus only ice melt (vastly different concentrations of salt), and to see which pair of times matched the data best. He played with different combinations for almost an hour, showing more interest than many of my graduate students!

#science
#Antarctica
#geology
#geochemistry
#WAISWorkshop2025

Photo taken over the shoulder of a child working on a tablet in a dimly lit room. His cheek and nose can be seen in the lower left corner, with the tablet on his lap. He has a yellow shirt and orange shorts, and his right hand is on the mouse pad while his left hand is across his chest. The computer screen shows some code and a graph. Windows on a wall and another person sprawled on the couch are visible in the background.

What secrets lie hidden in the jaws of a dinosaur?

It turns out that the enamel of dinosaurs’ fossilized teeth contains oxygen isotopes that provide clues about the early Earth’s atmosphere. An international research team used their newly developed method to investigate the climate and photosynthesis during the age of the dinosaurs: https://www.uni-goettingen.de/en/3240.html?id=7874

Research in #PNAS: https://doi.org/10.1073/pnas.25043241

#EarthSciences #Geochemistry #IsotopeGeology

Tooth of a Europasaurus, a dinosaur similar to Diplodocus, in limestone, found in the Langenberg quarry in the Harz Mountains which was also analysed in the study. The tooth is dark grey/brown and about the size of a section of a finger (fingers are also visible top and bottom of image holding the light grey rock). With many thanks to Thomas Tütken for the image.

Photo showing large, shiny, black tooth of a Tyrannosaurus rex – like the teeth analysed in this study – found in Alberta, Canada. The shape and size is similar to the horn of an animal - coming to a point. It is longer than the human hand that is holding it, which gives an idea of its size. With many thanks to Thomas Tütken for the image.

Chemical cycling (Biogeochemical cycle 🔄)

Chemical cycling describes systems of repeated circulation of chemicals between other compounds, states and materials, and back to their original state, that occurs in space, and on many objects in space including the Earth. Active chemical cycling is known to occur in stars, many planets and natural satellites. Chemical cycling play...

https://en.wikipedia.org/wiki/Chemical_cycling

#ChemicalCycling #Geochemistry #PlanetaryScience #BiogeochemicalCycle

Marine biogeochemical cycles (Biogeography 🌍)

Marine biogeochemical cycles are biogeochemical cycles that occur within marine environments, that is, in the saltwater of seas or oceans or the brackish water of coastal estuaries. These biogeochemical cycles are the pathways chemical substances and elements move through within the...

https://en.wikipedia.org/wiki/Marine_biogeochemical_cycles

#MarineBiogeochemicalCycles #Biogeography #Geochemistry #Oceanography #MarineOrganisms #SourceAttribution

Cosmic dust holds clues to Earth’s ancient atmosphere

Tiny particles of rock and metal have been raining down on our planet from space since time immemorial. An international research team discovered that these fossilized micrometeorites can help reconstruct the atmosphere of the past: https://www.uni-goettingen.de/en/3240.html?id=7871

Research in #CommunicationsEarth&Environment: https://doi.org/10.1038/s43247-025-02541-5

#Geosciences #IsotopeGeology #Geochemistry

Photo shows grey powdery rock and stones together with chunks of rock in the chalk marl pit in Hannover. Researchers collected around 100 kilograms of sedimentary rock and searched for fossilized micrometeorites. They found an average of one micrometeorite per kilogram of rock. There are also tools - such as a pick and lab noebook and other tool. Image thanks to researcher Fabian Zahnow

From @neiltsutsui on 🦋 2hrs ago:

We're hiring for a second position in my department this year! Assistant Professor in Environmental Geochemistry. https://aprecruit.berkeley.edu/JPF05078

____
Me:
#Environment #Geochemistry

Just a reminder that I have an open #research position on #geochemistry of benthic fluxes and #biodiversity hotspots that is waiting for someone. Come #dive into this one with me (possibly, also literally).

Contact me if you want more details.

Open position for PhD student / Postdoc in biogeochemistry
For a fully funded four-year project exploring environmental and
ecological dynamics in the Mediterranean and Red Sea, we seek a top
tier PhD student or postdoc. The project aims to understand the
formation and persistence of biodiversity hotspots, especially in light of
global climate change and local stressors. The ultimate goal is to
gather insights across different organizational levels, from molecular,
organismal, and community to habitat structure and biogeochemical
pathways, in order to construct comprehensive models that forecast
the future dynamics and fate of these ecosystems under changing
conditions. This position would be focused on a key aspect of this
project – the variability of seafloor fluxes and their interaction with the
microbial community to facilitate the habitability of shallow (up to 40 m)
and mesophotic (up to 200 m) biodiversity hotspots such as reefs.

Interested candidates, please contact by email Dr. Or Bialik (obialik@ocean.org.il) or Prof. Eyal Rahav (eyal.rahav@ocean.org.il) with a letter of motivation, CV, and contact details of at least one referee for this post not later than the 28th of August 2025.

Experiment will attempt to counter #climatechange by altering #ocean
“If we really want to have a shot at mitigating the worst effects of climate change, #carbon removal needs to start scaling to the point where it can supplement large-scale #emissions reductions,” said Adam Subhas, an associate scientist in marine #chemistry and #geochemistry at the #WoodsHole #Oceanographic Institution (#WHOI), who will oversee the week-long experiment.
https://arstechnica.com/science/2025/08/experiment-will-attempt-to-counter-climate-change-by-altering-ocean/

Dinosaur teeth as time capsules of climate data: New method to reconstruct carbon dioxide concentrations and global primary production from fossilized tooth enamel 👉 https://press.uni-mainz.de/dinosaur-teeth-as-time-capsules-of-climate-data/

#ClimateResearch #climate #palaeontology #dinosaur #TyrannosaurusRex #vertebrates #fossils #dinosaurs #paleontology #geochemistry #IsotopeGeology #OxygenIsotopes

Skeleton of a Tyrannosaurus rex discovered at Murray Ranch, Montana, USA (© Naturalis Biodiversity Center)

Tooth of a Tyrannosaurus rex that was excavated in Alberta, Canada (photo/©: Thomas Tütken)

Ocean acidification in the Great Barrier Reef (Oceanography 🌊)

Ocean acidification threatens the Great Barrier Reef by reducing the viability and strength of coral reefs. The Great Barrier Reef, considered one of the seven natural wonders of the world and a biodiversity hotspot, is located in Australia. Si...

https://en.wikipedia.org/wiki/Ocean_acidification_in_the_Great_Barrier_Reef

#OceanAcidificationInTheGreatBarrierReef #Carbon #Geochemistry #Oceanography #AquaticEcology #GreatBarrierReef

Pedosphere (Pedology 🟤)

The pedosphere 'ground, earth' and σφαῖρα 'sphere') is the outermost layer of the Earth that is composed of soil and subject to soil formation processes. It exists at the interface of the lithosphere, atmosphere, hydrosphere and biosphere. The pedosphere is the skin of the Earth and only develops when there is a dynamic interaction between the atmosphere, biosphere, lit...

https://en.wikipedia.org/wiki/Pedosphere

#Pedosphere #Pedology #Geochemistry #StructureOfTheEarth

BOGS 2025 is over. Prizes have been given for the Archie Douglas Award best oral presentation and also runner up oral and best and runner up poster presentation. Fear not, we will return and BOGS 2026 will be hosted at Sheffield Hallam sometime in July 2026... watch this space!

#BOGS2025 #BOGS2026 #OrganicGeochemistry #BioGeoChemistry #geochemistry

And now to the fifth and final scientific session of BOGS 2025. Presentations include: intra-crystalline protein decomposition in fossil shells, using constructed wetlands to address wastewater pollution and primary productivity at the Cretaceous-Paleogene boundary.

#BOGS2025 #OrganicGeochemistry #BioGeoChemistry #geochemistry

After an enjoyable happening last night, the second day and fourth session of BOGS 2025 includes presentation on: wild resource exploitation in Neolithic Europe using biomolecules, oxytetracycline removal from wastewater, understanding coral reef collapse from biomarkers and effect of agricultural plastics on microbial communities.

#BOGS2025 #OrganicGeochemistry #BioGeoChemistry #geochemistry

For the final BOGS 2025 presentation of the day, we have a plenary given by Gordon Inglis - Hopane for the best: developing novel geochemical proxies using bacterial hopanoids.

#BOGS2025 #OrganicGeochemistry #BioGeoChemistry #geochemistry

#geochemistry

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