Piecewise PV Inversion (PPVI)
Climate Dynamics, MIT EAPS, 2026
Piecewise Potential Vorticity Inversion (PPVI) for diagnosing atmospheric blocking events — replicating Davis et al. (2022, J. Climate, Fig. 8).
Teachings and Notes
Ertel PV Computation on Sigma Levels
Climate Dynamics, MIT EAPS, 2026
How to correctly compute Ertel Potential Vorticity (PV) for CMIP-class models that do not provide PV as a native output (unlike ERA5 or MPAS-Atmosphere).
Journal Paper Reading Notes
Literature Review, MIT EAPS, 2026
Reading notes and reproduction status for atmospheric blocking, Rossby wave breaking (RWB), and related machine-learning methods. All code, simulations, and notes live in the unified repository:
CorrDiff Notes
Machine Learning, MIT EAPS, 2025
Notes for building everything CorrDiff from this tutorial.
Run Your Own AI Weather Model
Machine Learning, misc., 2025
This is a quick intro on how to use run the (Nvidia) fourcastnetv2 and (Huawei) pangu AI model from ecmwf-plugin instructions.
HPC Quick Notes
HPC & Tools, misc., 2025
Some useful HPC commands
MPAS-A Notes
Climate Dynamics, MIT EAPS, 2025
Notes for building everything MPAS from this tutorial.
Various of Decompositions on a fluid field
Climate Dynamics, misc., 2025
Time-mean decomposition, high-low frequency decomposition, Helmholtz decomposition,… everything you’ll need to analyze a fluid field!
Intro to Globus CLI (on HPC)
HPC & Tools, misc., 2025
This is a quick intro on how to use Globus Command Line Interface line to transfer from NCAR to MIT oceans
Using Tempest Extreme to track (Anti)Cyclones anywhere on any level surfaces!
Climate Dynamics, Princeton GFDL, 2025
Some takeways from the 2025 Princeton GFDL Hackathon, esp. on tempest extreme, a tracking algo.
Intro to NCL (on HPC and PC)
HPC & Tools, misc., 2025
This is a quick intro on how to use NCL to process raw grib files downloaded from ECMWF using MARS api requests.
Machine Learning on Dynamical Systems
Machine Learning, MIT EAPS, 2025
I’ve started taking an off-cycle course 12.S592 on machine learning taught by Sai Ravela, with a focus on (non-Gaussian) dynamical systems. My desired final project is on extratropical cyclone downscaling, using a reduced stochastic model. Here are some PSet notes and schematic solutions, because they are very interesting problems to think about.
MIT EAPS Course Notes
Course Notes, MIT EAPS, 2024
These are my handwritten notes in OneNote format. Note that there may be Mandarin symbols. Click on the course name to open the notebook. Some of them had accessibility issues due to OneNote school account reasons; feel free to email me for a copy of such notes.
NYU Math Course Notes
Course Notes, NYU Courant, 2021
These are my handwritten notes in OneNote format. Note that there may be Mandarin or French symbols. Click on the course name to open the notebook.