variable string | source string | reason string | first_day timestamp[s] | last_day timestamp[s] | published_days int64 | observed_days int64 | interpolated_days int64 | how_to_build_the_flag string | first_fully_daily_year int64 | per_year dict | count int64 | entries list |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
sic | OSI-SAF (OSI-450-a / OSI-430-a / OSI-438), ITMO-NSS/Aiice global_series | "OSI-SAF was sampled every other day until mid-1987: SMMR operated on alternate days, so roughly hal(...TRUNCATED) | 1979-01-01T00:00:00 | 2026-04-18T00:00:00 | 17,275 | 15,555 | 1,720 | "days = [first_day + timedelta(days=i) for i in range(published_days)]; interpolated = {entry['date'(...TRUNCATED) | 1,991 | {"1979":{"published":365,"observed":179,"interpolated":186},"1980":{"published":366,"observed":172,"(...TRUNCATED) | 1,719 | [{"date":"1979-01-03T00:00:00","method":"linear","between":["1979-01-02T00:00:00","1979-01-04T00:00:(...TRUNCATED) |
Dataset
Aiice benchmark dataset for Arctic sea ice concentration (SIC) forecasting, based on OSI-SAF satellite products (CC BY 4.0).
Coverage
- Period: October 1978 – April 2026
- Resolution: 25 km spatial, daily temporal
- Grid: 432×432 (Lambert Azimuthal Equal Area, EPSG:6931)
Source products
| Product | Source | Period |
|---|---|---|
| OSI-450-a | SMMR, SSM/I, SSMIS | 1978–2020 |
| OSI-430-a | SSMIS | 2021–Jul 2025 |
| OSI-438 | AMSR2 | Jul 2025–present |
Processing
Raw NetCDF files were downloaded from osisaf.met.no and converted to
NPY matrix format. The ice_conc variable (fully filtered SIC with
atmospheric correction) was extracted for each timestep, yielding
432×432 matrices in the 0–100 value range.
The full download and processing pipeline is available in the Aiice toolbox.
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