Seismic waves tell us that something unusual is happening in the lowermost few hundred kilometers of Earth’s mantle. Beneath Africa and the Pacific lie two enormous thermochemical structures known as Large Low-Shear-Velocity Provinces (LLSVPs). These “large blobs” are slower to transmit shear waves, but beyond that, their physical nature remains one of the biggest open questions in deep Earth geod ...[Read More]
Is the lower mantle boring? For a long time, the lower mantle was thought to be relatively featureless and uniform compared to the more dynamic upper mantle. But recent seismic observations are challenging that idea, especially when we look near the base of the mantle. Recent studies from Maureen Long’s group (Creasy et al. 2017, Wolf et al. 2019, Reiss et al. 2019, Wolf & Long, 2023) and othe ...[Read More]
All models are wrong, but some are useful – we all have heard this quote. But it raises several questions (including but not limited to) – What would a model of the entire world look like? Can you couple geodynamical models with climate and biological evolution models? Would these models be useful? In this week’s blog post, Timothy Gray, a PhD student from ETH Zürich is looking for ans ...[Read More]
Summer is not over yet, so today I prepared a list of science YouTube channels to check out during the lazy summer afternoons. Scientists and teachers love to share their research, experiments and insights with anyone who is willing to listen, so there are many fantastic science channels to watch. These people work hard to make science accessible for everyone, so when we’re all done watching bad s ...[Read More]
Theeerre ish noffink quite so dangerereroush as ashkink a seeeriouss question of scieeence at 18h30 on a Friday. Rudi inshtead ashks the not-at-all, definitely-not, who-me, ashking-for-a-friend queshtion: Can I get drunk at Friday Beers? Dear Rudi, Your question has more answers than asking a conference of geodynamicists what’s the best wine? With movement and beer restrictions in place, the ...[Read More]
As a new coping mechanism with reality, Sascha has been digging into some science history and asked: How did scientists discover plate tectonics? Dear Sascha, I do enjoy a good walk on the memory lane of scientific discoveries. You might know by now that great insight is gained when we look at data with fresh eyes. Hence, lots of advances in certain narrow scientific fields come from outsiders. In ...[Read More]
In anticipation of a remote and highly-sanitised new academic year, with a new cohort of virus-carrying PhDs, Chris wonders: What do you do if students come from different cultural backgrounds where student participation and discussion is not valued? Dear Chris, Easy: you jump three times and clap with joy as you just hit JACKPOT! Do you finally have a student who does not question your great wisd ...[Read More]
In between homeschooling three children, Zoom meetings, online teaching, Skype vivas, and emergency grant reviews, Alex wonders: How do I keep track of all the newly published research out there? Dear Alex, I am sure it’s on the minds of many of our fellow academics, who just reside bored in their homes at these times. What else to do during a pandemic other than scouring Twitter for the new ...[Read More]
The Geodynamics 101 series serves to showcase the diversity of research topics and/or methods in the geodynamics community in an understandable manner. In this week’s Geodynamics 101 post, Marcel Thielmann, Senior Researcher at the University of Bayreuth, discusses the possible mechanisms behind the ductile deformation at great depths that causes deep earthquakes. Earthquakes are one of the expre ...[Read More]
Plate tectonics is a key geological process on Earth, shaping its surface, and making it unique among the planets in the Solar System. Yet, how plate tectonics emerged and which factors controlled its evolution remain controversial. The recently published paper in Nature by Sobolev and Brown suggests new ideas to solve this problem…. What makes plate tectonics possible on contemporary Earth? It is ...[Read More]