Regional models of the ocean (ROMS), weather (WRF) and waves (WaveWatch III) for the main Hawaiian Islands, run by the Pacific Islands Ocean Observing System (PacIOOS) to simulate and forecast currents, temperature, salinity, winds and waves.
🌐 View data in browser · 💻 Data access (code) · 📦 Data access (PacIOOS)
Model output from the Pacific Islands Ocean Observing System (PacIOOS)
for the main Hawaiian Islands. The ocean, wave and weather models are run at the University of
Hawaiʻi at Mānoa. The original NetCDF files are copied here unchanged, and
Icechunk stores are built over them, so that a whole archive opens in
about a second as one lazy xarray dataset.
The Icechunk stores are virtual. Each holds only Zarr metadata and byte-range references to the NetCDF copies beside it, so both the store and its data are served by Source Cooperative. The forecast copies stop at 2026-11-12; a daily update is planned.
It draws in an ordinary browser, with no extension.
Icechunk stores: each dataset's README has tested loading code. Python 3.12 or newer and icechunk 2.3 or newer are required; no credentials are needed.
NetCDF copies: anonymous HTTPS (with byte ranges) or S3 (endpoint
https://data.source.coop, bucket ocean-icechunks), at
https://data.source.coop/ocean-icechunks/pacioos/<dataset>/netcdf/[<version>/]<year>/<file>.nc
Each file has an .md5 beside it. The copies are write-once: a new version of a dataset
goes in a new folder (for example netcdf/v3.0/), and existing files are never changed.
Known problems in the files (relabelled WRF runs in 2010–13, WW3 cold starts, and others) are listed in the file audit.
The code, notes and audit are in
ocean-icechunks/pacioos. The files were copied
from the PacIOOS server with rclone and checked against MD5 sums. Each store is built in the
same order: a written plan, a local smoke test, a scratch store with a viewer, then the
published store, which is validated anonymously from its public URL against netCDF-C reads of
the files. How the reanalysis store was made, and how to rebuild it:
how_store_created.md.
The data are PacIOOS's. Any use of the NetCDF copies or the Icechunk stores should cite PacIOOS, as described at https://www.pacioos.hawaii.edu/data-services/.
The code that copied the files and built the stores was written by E. E. Holmes and is released under the Apache License 2.0. It can be used without attribution.
WaveWatch III waves (ww3_hawaii), daily runs | Wave forecast | 2011-06-21 to 2026-11-11 | ww3_hawaii/netcdf/, 5,232 files, 0.49 TB | not built yet |