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Ashesh Chattopadhyay

@ashesh6810.bsky.social
219 followers 227 following 45 posts

Scientific ML, ML theory, ML for climate, fluids, dynamical systems. Asst. Prof of Applied Math at UCSC. sites.google.com/view/ashesh6810/ho…

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Reposted by Ashesh Chattopadhyay
Baskin Engineering at UC Santa Cruz @baskinengineering.bsky.social · 21/09/2026
A partnership with Fujitsu Research is enabling #BaskinEngineering Assistant Professor of Applied Mathematics Ashesh Chattopadhyay (@ashesh6810.bsky.social)to build energy-efficient AI models for climate predictions and solutions that analyze vulnerable regions. Learn more: bit.ly/4gUVMHC
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Partnership with Fujitsu enables long-term impact forecasting of climate risks
Ashesh Chattopadhyay and Fujitsu Research are developing actionable AI-based climate models that reduce resource-guzzling computation time from months to minutes
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Reposted by Ashesh Chattopadhyay
Baskin Engineering at UC Santa Cruz @baskinengineering.bsky.social · 01/07/2026
Thrilled to share that Ashesh Chattopadhyay (@ashesh6810.bsky.social), assistant professor of applied mathematics at #BaskinEngineering, was awarded the 2026 SIAM Activity Group on Mathematics of Planet Earth Early Career Prize! Learn more: bit.ly/4wlKxNk
Portrait of Ashesh Chattopadhyay, supporting text says "SIAM Activity Group on Mathematics of Planet Earth Early Career Prize recipient!" with the Baskin Engineering logo.
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Reposted by Ashesh Chattopadhyay
Baskin Engineering at UC Santa Cruz @baskinengineering.bsky.social · 17/02/2026
🌎 #BaskinEngineering Assistant Professor of Applied Mathematics @ashesh6810.bsky.social will build #AI models to project extreme Earth-system events with the support of the highly competitive Sloan Research Fellowship. Learn more: bit.ly/40f0UND
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Ashesh Chattopadhyay wins Sloan Fellowship to build advanced AI for Earth-system modeling
Assistant Professor of Applied Mathematics Ashesh Chattopadhyay will build AI models to project extreme Earth-system events.
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Reposted by Ashesh Chattopadhyay
Baskin Engineering at UC Santa Cruz @baskinengineering.bsky.social · 22/01/2026
🌪️⛈️ Weather #forecasting is computationally demanding—that's why #BaskinEngineering Assistant Professor @ashesh6810.bsky.social aims to use #AI to predict extreme weather using a fraction of the time, energy, and #computing power of today’s methods. Via @uofcalifornia.bsky.social: bit.ly/3ZrNDAU
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How UC scientists are putting AI to the test
Even as they’re pushing the boundaries of research and discovery with AI, UC scientists are asking the right questions about the transformation this technology brings.
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Ashesh Chattopadhyay @ashesh6810.bsky.social · 12/12/2025
🧵 1/10 We introduce a new theoretical framework for continuous score-based diffusion models, showing that standard DDPMs contain a built-in spectral failure mode when applied to any multi-scale, power-law physical system.https://arxiv.org/abs/2512.09572
arxiv.org
Lazy Diffusion: Mitigating spectral collapse in generative diffusion-based stable autoregressive emulation of turbulent flows
Turbulent flows posses broadband, power-law spectra in which multiscale interactions couple high-wavenumber fluctuations to large-scale dynamics. Although diffusion-based generative models offer a pri...
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Reposted by Ashesh Chattopadhyay
Baskin Engineering at UC Santa Cruz @baskinengineering.bsky.social · 09/10/2025
🌊 Research led by #BaskinEngineering Assistant Professor of Applied Mathematics @ashesh6810.bsky.social shows that regional ocean dynamics in the Gulf of Mexico can be better emulated with #AI models—offering new possibilities for navigation and extreme weather monitoring. Read on: bit.ly/4n0AHvj
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Regional ocean dynamics can be better emulated with AI models
Researchers show the success of their technical in a critical region: the Gulf of Mexico.
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Ashesh Chattopadhyay @ashesh6810.bsky.social · 20/08/2025
🚨 New from our group! A stable AI framework for high-res regional ocean modeling-- joint work with Fujitsu Research and NC State led by @baskinengineering.bsky.social PhD students Lenny and @moeindarman.bsky.social. Now out in JGR: Machine Learning & Computation 🌊🤖 🔗 doi.org/10.1029/2025JH000851 🧵
doi.org
Simultaneous Emulation and Downscaling With Physically Consistent Deep Learning‐Based Regional Ocean Emulators
An AI-based physically consistent long-term regional emulator has been developed for the Gulf of Mexico region A deterministic and stochastic downscaling model has been developed to super-resolve...
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Ashesh Chattopadhyay @ashesh6810.bsky.social · 10/07/2025
🚨 New preprint alert! “Generative Lagrangian Data Assimilation for Ocean Dynamics Under Extreme Sparsity” is live! 📄 arxiv.org/abs/2507.06479 🌊 Reconstructs high-res ocean states from just 0.1% data using #GenAI. No forward model needed. (1/5)
arxiv.org
Generative Lagrangian data assimilation for ocean dynamics under extreme sparsity
Reconstructing ocean dynamics from observational data is fundamentally limited by the sparse, irregular, and Lagrangian nature of spatial sampling, particularly in subsurface and remote regions. This ...
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Ashesh Chattopadhyay @ashesh6810.bsky.social · 02/06/2025
A physical analysis of #OceanNet, our high-resolution regional ocean digital twins' predictions for the Loop Current led by Anna Lowe in collaboration with Michael Gray, Tianning Wu, and Ruoying He out in AMS AI for Earth systems. journals.ametsoc.org/view/journal...
journals.ametsoc.org
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Reposted by Ashesh Chattopadhyay
Baskin Engineering at UC Santa Cruz @baskinengineering.bsky.social · 28/05/2025
🌪️ Can #AI predict freak weather events? AI models handle daily forecasts well—but often miss rare extremes. A team including #BaskinEngineering Asst. Prof. @ashesh6810.bsky.social is exploring how adding physics-based principles could improve AI’s accuracy in extreme cases. bit.ly/3Foh7ta
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Ashesh Chattopadhyay @ashesh6810.bsky.social · 21/05/2025
Check out our new work in @pnas.org exploring AI weather's capabilities to predict OOD gray swans.
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Ashesh Chattopadhyay @ashesh6810.bsky.social · 23/04/2025
We released a new pre-print (arxiv.org/abs/2504.15487) on understanding the physics of out-of-distribution generalization (and lack there-of) for turbulence modeling of ocean dynamics. Led by @moeindarman.bsky.social with @pedramh.bsky.social and Laure Zanna.
arxiv.org
Fourier analysis of the physics of transfer learning for data-driven subgrid-scale models of ocean turbulence
Transfer learning (TL) is a powerful tool for enhancing the performance of neural networks (NNs) in applications such as weather and climate prediction and turbulence modeling. TL enables models to ge...
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Reposted by Ashesh Chattopadhyay
Yao Lai @chingyaolai.bsky.social · 17/03/2025
Looking forward to learning about recent advances in #AI4Climate at the @apsphysics.bsky.social #GlobalPhysicsSummit meeting. Come check out the back-to-back focus sessions, "AI Applications in Weather and Climate I & II," on Tuesday from 9:00 AM to 1:30 PM! summit.aps.org/schedule/?c=...
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Reposted by Ashesh Chattopadhyay
Ashesh Chattopadhyay @ashesh6810.bsky.social · 19/11/2024
I am hiring for a #postdocposition for scientific ML + climate dynamics. Folks with deep learning, scientific computing skills; preferably some background in climate, please reach out! This is part of an #NSF project in collaboration with Nicole Feldl and Geoff Vallis. recruit.ucsc.edu/JPF01844
recruit.ucsc.edu
Postdoctoral Scholar - Chattopadhyay Lab
University of California, Santa Cruz is hiring. Apply now!
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Ashesh Chattopadhyay @ashesh6810.bsky.social · 10/01/2025
We have released a new pre-print on AI-based long-term regional ocean modeling and downscaling. arxiv.org/abs/2501.05058. This is work led by my PhD students Lenny and Moein with collaborators Roy He, Michael Gray, and Tianning Wu at NCSU and Subhashis Hazarika and Anthony Wong at Fujitsu Research
arxiv.org
Simultaneous emulation and downscaling with physically-consistent deep learning-based regional ocean emulators
Building on top of the success in AI-based atmospheric emulation, we propose an AI-based ocean emulation and downscaling framework focusing on the high-resolution regional ocean over Gulf of Mexico. R...
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Ashesh Chattopadhyay @ashesh6810.bsky.social · 09/12/2024
If you are around at #AGU2024 and interested in ML for climate, please check out these talks from my group and collaborators. 1. Biases, instability, hallucinations in ML emulators of weather and climate. agu.confex.com/agu/agu24/me.... You can also see our paper here: arxiv.org/abs/2304.07029 1/5
agu.confex.com
Understanding and mitigating hallucinations in AI-based Earth system emulators: Towards seamless weather to climate models
Recent efforts in building AI-based weather forecasting applications have recei...
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Ashesh Chattopadhyay @ashesh6810.bsky.social · 25/11/2024
Arvind, me, and Jonah released a new pre-print on some pen and paper analysis of fundamental failure modes and old school stability analysis for neural PDEs typically used in AI for Science application. arxiv.org/abs/2411.15101. 1/n
arxiv.org
What You See is Not What You Get: Neural Partial Differential Equations and The Illusion of Learning
Differentiable Programming for scientific machine learning (SciML) has recently seen considerable interest and success, as it directly embeds neural networks inside PDEs, often called as NeuralPDEs, d...
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Ashesh Chattopadhyay @ashesh6810.bsky.social · 19/11/2024
I am hiring for a #postdocposition for scientific ML + climate dynamics. Folks with deep learning, scientific computing skills; preferably some background in climate, please reach out! This is part of an #NSF project in collaboration with Nicole Feldl and Geoff Vallis. recruit.ucsc.edu/JPF01844
recruit.ucsc.edu
Postdoctoral Scholar - Chattopadhyay Lab
University of California, Santa Cruz is hiring. Apply now!
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Reposted by Ashesh Chattopadhyay
Pedram Hassanzadeh @pedramh.bsky.social · 17/11/2024
Sr Director position (weather forecast) at UChicago's new Human-Centered Weather Forecasting Initiative. Unique opportunity to lead an interdisciplinary team to generate AI- & physics-based forecasts, particularly to support communities most vulnerable to climate variability.
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