Poulami Roy

What’s blobbing inside the Earth? – insights from numerical modelling 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 ...

In this week’s blog, @poulamiroy.bsky.social explores the nature of Large Low-Shear-Velocity Provinces & how modelling with ASPECT geodynamics code helps reveal their role in mantle flow.

blogs.egu.eu/divisions/gd/2026/03/04/how-is-deep-earth-blobbing-insight-from-numerical-modelling/

What’s blobbing inside the Earth? – insights from numerical modelling 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 ...

How did the deep mantle behave in the last 250 millions of years ? 🌐
Dr. Poulami Roy, PDRA in the department, just published a new blog article on @egu.eu @egu-gd.bsky.social, on quantifying the Deep Mantle with Numerical Modelling:
blogs.egu.eu/divisions/gd...

#DUinspire #WomenInSTEM #EGU #EGUGD

We are pleased to share that Dr. Poulami Roy @poulamiroy.bsky.social will serve as Co-Convenor for the session GMPV9.2 @egu-gmpv.bsky.social :
“Craton Evolution and Dynamics: Integrating Geochemical and Geodynamic Approaches” at @egu.eu 🌍
meetingorganizer.copernicus.org/EGU26/sessio...

#EGU26

Are you a craton scientist looking for a perfect session at #EGU26?

Then consider submitting an abstract below 😊

www.egu26.eu/session/55759

bsky.app/profile/poul...

This science sleuth revealed a retraction crisis at Indian universities Achal Agrawal is part of Nature’s 10, a list of people who shaped science in 2025.

Achal Agrawal realised how ingrained research misconduct had become, and resolved to do something about the issue

He is part of Nature’s 10, a list of people who shaped science in 2025
go.nature.com/3Yk3d0T

Just wrapped up a 1-hour talk at the Dpt. of Geological Sciences, Jadavpur University, India. What an experience! Loved the interaction with the students. Such an energising session! Thanks to Prof. Nibir Mandal for organizing the seminar.

With @geophyjo.bsky.social , @fabiocapitanio.bsky.social , @richardmpalin.bsky.social

Join our #EGU26 session on "Cratons through time: Geodynamics, Geochemistry and the Evolution of a Habitable Planet"

Multidisciplinary abstracts welcome- geodynamics, geochemistry, geology, geophysics & biogeodynamics.

Submit your abstract
meetingorganizer.copernicus.org/EGU26/sessio...

Thank you! 😊

Edited by Pauline Gayrin

Bored by the Lower Mantle? Think again!
In my new @egu-gd.bsky.social blog, I talk about how we model deep mantle dynamics and use seismic anisotropy as a diagnostic tool to compare models with real observations, revealing a lot more going on down there than we think.
blogs.egu.eu/divisions/gd...

Bored by the Lower Mantle? Think Again! 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 challe...

New blog alert! This week Poulami Roy attempts to change our minds about the lower mantle - what if it is not *that* boring after all?

blogs.egu.eu/divisions/gd...

#egu #egugeodynamics

Seismic Anisotropy Reveals Deep-Mantle Dynamics - Eos A new study offers insight into the viscous BLOBs at the base of Earth’s mantle.

Happy to share that our recent paper on global-scale geodynamic + seismic anisotropy simulation is on Eos spotlight. With @bstein.bsky.social , Manuele Faccenda , @michapons.bsky.social
Enjoy reading! :)
eos.org/research-spo...

Seismic Anisotropy Reveals Deep-Mantle Dynamics - Eos A new study offers insight into the viscous BLOBs at the base of Earth’s mantle.

How do BLOBs in Earth’s mantle affect seismic waves?

Research by @poulamiroy.bsky.social & @bstein.bsky.social of @gfz.bsky.social and colleagues offers new insights. eos.org/research-spo...

I like the side by side view of these two figures combined… thanks Bernhard! :)

3rd paper from @poulamiroy.bsky.social's Ph.D. just out at doi.org/10.1029/2025.... Combined global models of mantle flow and anisotropy constrain deformation mechanisms and viscosity, density and hence compositional structure of lowermost mantle. With Manuele Faccenda, @michapons.bsky.social & me.

With @bstein.bsky.social, Manuele Faccenda, @michapons.bsky.social

What’s happening 3000 km beneath our feet? Can mantle plumes rise all the way from that depth to the surface? How do we trace mantle flow down there? Can seismic anisotropy let us ‘see’ it? We explore this in our latest paper agupubs.onlinelibrary.wiley.com/doi/10.1029/... (co-authors in comment)

Thanks @bstein.bsky.social for advertising the paper. :)

Scientific recycling: In doi.org/10.1029/2024... I use results from Poulami Roy's Ph.D. thesis to address why plume excess temperatures are much less than temperature drop across the lowermost-mantle thermal boundary layer. Further co-authors @michapons.bsky.social and Matteo Jopke. (continued)

Wondering what is the anisotropic signature of slab-induced plumes from thermochemical piles in the lowermost mantle? Then find out from Poulami Roy's paper agupubs.onlinelibrary.wiley.com/doi/10.1029/... co-authored by Manuele Faccenda, @michapons.bsky.social and myself