Datasets:

Scallions
/

seaice-obs

Error code:   StreamingRowsError
Exception:    IndexError
Message:      tuple index out of range
Traceback:    Traceback (most recent call last):
                File "/src/services/worker/src/worker/utils.py", line 147, in get_rows_or_raise
                  return get_rows(
                      dataset=dataset,
                  ...<4 lines>...
                      column_names=column_names,
                  )
                File "/src/libs/libcommon/src/libcommon/utils.py", line 272, in decorator
                  return func(*args, **kwargs)
                File "/src/services/worker/src/worker/utils.py", line 127, in get_rows
                  rows_plus_one = list(itertools.islice(safe_iter(ds, dataset=dataset), rows_max_number + 1))
                File "/src/services/worker/src/worker/utils.py", line 483, in safe_iter
                  yield from ds.decode(False) if ds.features else ds
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2951, in __iter__
                  for key, example in ex_iterable:
                                      ^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2461, in __iter__
                  for key, pa_table in self._iter_arrow():
                                       ~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2486, in _iter_arrow
                  for key, pa_table in self.ex_iterable._iter_arrow():
                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 547, in _iter_arrow
                  for key, pa_table in iterator:
                                       ^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 430, in _iter_arrow
                  for key, pa_table in self.generate_tables_fn(**gen_kwags):
                                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/hdf5/hdf5.py", line 76, in _generate_tables
                  num_rows = _check_dataset_lengths(h5, self.info.features)
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/hdf5/hdf5.py", line 347, in _check_dataset_lengths
                  num_rows = h5_obj[first_path].shape[0]
                             ~~~~~~~~~~~~~~~~~~~~~~~~^^^
              IndexError: tuple index out of range

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Sea-ice observation / validation datasets (mirror)

Unmodified mirror of public sea-ice observation and reanalysis products, collected for validating CICE sea-ice model runs (test period 2005-2009). Files keep their original names and directory structure under one folder per provider/product. Every file is listed in manifest.csv with size, MD5, checksum source, original URL, licence and whether its presence and size were verified on Hugging Face and ModelScope.

All credit belongs to the original data producers. Please cite the original products (below) and follow their licences. This mirror is not an official distribution channel; check the source for the latest versions.

Checksums: NSIDC G02202 files are checked against the NSIDC-provided MD5 manifests (.mnf). The other providers publish no per-file checksums on the servers used, so their MD5 in the manifest was computed on download after an integrity check (NetCDF/HDF opened, gzip/zip tested, TIFF/PNG/PDF magic bytes, no HTML error page).

folder	files	size (GB)
`obs/satellite/osisaf_osi-450-a1/`	4742	5.04
`obs/satellite/unibremen_amsr2-asi-6250/`	3000	2.89
`derived-index/nsidc_g02135-v4/`	0	0.00
`obs/satellite/awi_cs2smos/`	0	0.00
`reanalysis/psc_piomas-v2.1/`	449	2.43
`obs/satellite/esacci_sea-ice-concentration/`	0	0.00
`obs/satellite/esacci_sea-ice-thickness/`	0	0.00
`obs/satellite/nsidc_g02202-v6/`	2508	8.85
`obs/satellite/nsidc_atl20-v005/`	186	0.58
`obs/satellite/nsidc_nsidc-0116-v4.1/`	192	3.08

Satellite observations (`obs/satellite/`)

`obs/satellite/osisaf_osi-450-a1/` - EUMETSAT OSI SAF Global Sea Ice Concentration CDR v3.1 (OSI-450-a1)

DOI / reference: 10.15770/EUM_SAF_OSI_0013
Licence: Free and open; attribution to EUMETSAT OSI SAF required (served by MET Norway THREDDS under NLOD and CC BY 4.0).
Citation: OSI SAF (2025): Global Sea Ice Concentration Climate Data Record v3.1, OSI-450-a1, EUMETSAT Ocean and Sea Ice Satellite Application Facility, doi:10.15770/EUM_SAF_OSI_0013. Lavergne, T. et al. (2019), The Cryosphere 13, 49-78, doi:10.5194/tc-13-49-2019.
Coverage in this mirror: NH+SH, EASE2 25 km. Daily files 2005-01-01..2009-12-31; monthly means full record 1978-2020; yearly means full record.
Subsetting decision: OSI-450-a1 is the current (corrected) release, superseding OSI-450 (v2.0) and OSI-450-a (v3.0); only v3.1 is mirrored. Daily full record (1978-2020) is ~~45 GB, so daily files are limited to the CICE test period 2005-2009 (~~4 GB); monthly + yearly means are full record (~1 GB). OSI-430-b (ICDR v2.0, 2016-2023-05, deprecated, ~30 GB, no overlap with 2005-2009) was NOT mirrored; its successor OSI-430-a also lies outside 2005-2009.
Source: https://thredds.met.no/thredds/catalog/osisaf/met.no/reprocessed/ice/conc_450a1_files/catalog.html

`obs/satellite/unibremen_amsr2-asi-6250/` - University of Bremen AMSR2 ASI sea ice concentration 6.25 km v5.4

DOI / reference: 10.1594/PANGAEA.898399 (Arctic), 10.1594/PANGAEA.898400 (Antarctic)
Licence: Free for use with citation; PANGAEA editions are CC-BY-4.0.
Citation: Spreen, G., Kaleschke, L., Heygster, G. (2008): Sea ice remote sensing using AMSR-E 89 GHz channels, J. Geophys. Res. 113, C02S03, doi:10.1029/2005JC003384. Melsheimer, C., Spreen, G. (2019): AMSR2 ASI sea ice concentration data, Arctic/Antarctic, version 5.4, PANGAEA.
Coverage in this mirror: NH (n6250) + SH (s6250) polar stereographic 6.25 km, daily NetCDF, 2012-07..present (as of mirror date).
Subsetting decision: AMSR2 starts July 2012 (no 2005-2009 coverage). Full daily record taken because the NetCDF daily files are small (~1.2 MB NH, ~0.6 MB SH; ~9 GB total). Only the netcdf/ subfolders (v5.4) are mirrored; HDF/GeoTIFF/PNG duplicates of the same fields were skipped.
Source: https://data.seaice.uni-bremen.de/amsr2/asi_daygrid_swath/

`obs/satellite/awi_cs2smos/` - AWI CryoSat-2/SMOS merged sea ice thickness (CS2SMOS) v2.06

DOI / reference: (no dataset DOI; reference Ricker et al. 2017, doi:10.5194/tc-11-1607-2017)
Licence: Free and anonymous access; acknowledgement required: 'The production of the merged CryoSat-SMOS sea ice thickness data was funded by the ESA project SMOS & CryoSat-2 Sea Ice Data Product Processing and Dissemination Service, and data from DATE to DATE were obtained from AWI.'
Citation: Ricker, R., Hendricks, S., Kaleschke, L., Tian-Kunze, X., King, J., Haas, C. (2017): A weekly Arctic sea-ice thickness data record from merged CryoSat-2 and SMOS satellite data, The Cryosphere 11, 1607-1623, doi:10.5194/tc-11-1607-2017.
Coverage in this mirror: NH only (Arctic), weekly 25 km EASE2, winter months (Oct-Apr) from 2010/11 to 2024/25; 'r' = reprocessed, 'o' = operational files.
Subsetting decision: CS2SMOS starts in late 2010 (CryoSat-2 + SMOS), so it does NOT cover the 2005-2009 CICE test period. Full v206 record mirrored (small). The newer v300 (CS3SMOS, from 2025/26) was not found on the portal at mirror time.
Source: https://data.seaiceportal.de/data/cs2smos_awi/v206/

`obs/satellite/esacci_sea-ice-concentration/` - ESA Sea Ice CCI High(er)-Resolution Sea Ice Concentration CDR v3.0 (SSM/I & SSMIS, 12.5 km)

DOI / reference: 10.5285/eade27004395466aaa006135e1b2ad1a
Licence: ESA CCI open data policy (CEDA permitted use: any), citation required.
Citation: Lavergne, T., Sorensen, A., Tonboe, R. T., Kreiner, M., Saldo, R., Birkedal, A., Baordo, F., Aspenes, T., Eastwood, S. (2023): ESA Sea Ice Climate Change Initiative (Sea_Ice_cci): High(er) Resolution Sea Ice Concentration Climate Data Record Version 3 (SSM/I and SSMIS). NERC EDS CEDA. doi:10.5285/eade27004395466aaa006135e1b2ad1a.
Coverage in this mirror: NH+SH, EASE2 12.5 km daily, 2005-01-01..2009-12-31 (full product 1991-2020).
Subsetting decision: Full v3.0 record is ~~84 GB, so only 2005-2009 is mirrored (~~14 GB). The CCI AMSR-E/AMSR2 SIC v2.1 (25/50 km, ~160 GB) and phase-1 old products were skipped.
Source: https://dap.ceda.ac.uk/neodc/esacci/sea_ice/data/sea_ice_concentration/L4/ssmi_ssmis/12.5km/v3.0/

`obs/satellite/esacci_sea-ice-thickness/` - ESA Sea Ice CCI sea ice thickness L3C v4.0 (ERS-2, Envisat, CryoSat-2)

DOI / reference: CEDA records: Envisat NH 10.5285/a0120f31bcd94f8da74ddfebe658773d, CryoSat-2 NH 10.5285/887ebbe3aa4345f3bbcbe2dd1834d955 (see catalogue.ceda.ac.uk for SH/ERS-2 records)
Licence: ESA CCI open data policy (CEDA permitted use: any), citation required.
Citation: Hendricks, S., Paul, S., Rinne, E. (2025): ESA Sea Ice Climate Change Initiative (Sea_Ice_cci): sea ice thickness from Envisat / CryoSat-2 / ERS-2 on a monthly grid (L3C), v4.0. NERC EDS CEDA.
Coverage in this mirror: Monthly L3C grids. Envisat NH+SH 2002-2012, CryoSat-2 NH+SH 2010-2024, ERS-2 NH 1990s-2003. Covers 2005-2009 via Envisat.
Subsetting decision: Only the latest version v4.0 mirrored (full record, <1 GB). Older v2.0/v3.0, L2P along-track and the drift-aware thickness product were skipped.
Source: https://dap.ceda.ac.uk/neodc/esacci/sea_ice/data/sea_ice_thickness/L3C/

`obs/satellite/nsidc_g02202-v6/` - NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 6 (G02202)

DOI / reference: see https://nsidc.org/data/g02202/versions/6 for the Version 6 DOI
Licence: No restrictions on use (NOAA open data); please cite.
Citation: Meier, W. N., Fetterer, F., Windnagel, A. K., Stewart, J. S. (2025). NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 6 (G02202). NSIDC, Boulder, CO.
Coverage in this mirror: NH (psn25) + SH (pss25), 25 km polar stereographic, 1978-10 to present: yearly aggregate files containing all daily fields, plus monthly files, ancillary masks and NSIDC .mnf checksum manifests.
Subsetting decision: Version 6 is the current release (v5 is no longer on the public server). It is served publicly by NOAA@NSIDC without Earthdata login. Full record via the yearly aggregate files (~~8.3 GB) + monthly (~~0.45 GB); the individual daily files (~15 GB) are exact duplicates of the aggregates and were skipped. Every NetCDF was verified against the NSIDC-provided MD5 (.mnf).
Source: https://noaadata.apps.nsidc.org/NOAA/G02202_V6/

`obs/satellite/nsidc_atl20-v005/` - ICESat-2 ATL20 Daily and Monthly Gridded Sea Ice Freeboard, Version 5

DOI / reference: 10.5067/ATLAS/ATL20.005
Licence: NASA open data policy, no restrictions; please cite.
Citation: Petty, A. A., Kurtz, N. T., Kwok, R., Markus, T., Neumann, T. A., Keeney, N. (2023). ATLAS/ICESat-2 L3B Daily and Monthly Gridded Sea Ice Freeboard, Version 5 (ATL20). NASA NSIDC DAAC. doi:10.5067/ATLAS/ATL20.005.
Coverage in this mirror: NH (ATL20-01) + SH (ATL20-02), 25 km, monthly granules (with daily fields inside), 2018-10 to present.
Subsetting decision: ICESat-2 starts in Oct 2018 (no 2005-2009 coverage). Full record taken (gridded product, small). ATL10 along-track freeboard was skipped (very large); ATL20 is the gridded product.
Source: https://data.nsidc.earthdatacloud.nasa.gov/nsidc-cumulus-prod-protected/ATLAS/ATL20/005/ (Earthdata login)

`obs/satellite/nsidc_nsidc-0116-v4.1/` - Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vectors, Version 4 (NSIDC-0116, files v4.1)

DOI / reference: 10.5067/INAWUWO7QH7B
Licence: NASA open data policy, no restrictions; please cite.
Citation: Tschudi, M., Meier, W. N., Stewart, J. S., Fowler, C., Maslanik, J. (2019). Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vectors, Version 4. NASA NSIDC DAAC. doi:10.5067/INAWUWO7QH7B.
Coverage in this mirror: NH + SH, 25 km EASE-Grid, 1978-11 to latest available year: yearly NetCDF files of daily vectors (daily/) and of weekly means (weekly/).
Subsetting decision: Full record taken (yearly NetCDF, ~3 GB total). browse/ images and input_sources/ (per-sensor input vectors) were skipped. No provider checksums on the server; MD5 computed after opening each NetCDF.
Source: https://daacdata.apps.nsidc.org/pub/DATASETS/nsidc0116_icemotion_vectors_v4/ (Earthdata login)

Model reanalysis (`reanalysis/`)

`reanalysis/psc_piomas-v2.1/` - PIOMAS (Pan-Arctic Ice Ocean Modeling and Assimilation System) v2.1 thickness and volume

DOI / reference: (no dataset DOI; references below)
Licence: Freely provided by the Polar Science Center, APL/UW; please cite. Note PIOMAS is a model reanalysis, not a direct observation.
Citation: Zhang, J., Rothrock, D. A. (2003): Modeling global sea ice with a thickness and enthalpy distribution model in generalized curvilinear coordinates, Mon. Wea. Rev. 131, 845-861. Schweiger, A. et al. (2011): Uncertainty in modeled Arctic sea ice volume, J. Geophys. Res. 116, C00D06, doi:10.1029/2011JC007084.
Coverage in this mirror: Arctic, PIOMAS model grid (360x120), 1978-present. heff = monthly mean effective thickness; hiday = daily thickness; area = monthly/daily concentration; plus daily/monthly volume and mean-thickness time series and grid/reader utilities.
Subsetting decision: Full record of the thickness (heff, hiday), area and volume products. Other PIOMAS fields (ocean T/S/velocity, snow, ice velocity, forcing) were skipped as out of scope.
Source: https://pscfiles.apl.washington.edu/zhang/PIOMAS/data/v2.1/ and https://psc.apl.uw.edu/research/projects/arctic-sea-ice-volume-anomaly/data/

Derived indices (`derived-index/`)

`derived-index/nsidc_g02135-v4/` - NOAA/NSIDC Sea Ice Index, Version 4 (G02135)

DOI / reference: 10.7265/a98x-0f50
Licence: No restrictions on use; please cite.
Citation: Fetterer, F., Knowles, K., Meier, W. N., Savoie, M., Windnagel, A. K., Stafford, T. (2025). Sea Ice Index (G02135, Version 4). NSIDC, Boulder, CO. doi:10.7265/a98x-0f50.
Coverage in this mirror: NH+SH, 1978-present. Daily and monthly extent/area tables (CSV), regional analysis spreadsheets, monthly concentration/extent/anomaly GeoTIFFs (25 km).
Subsetting decision: Full record of data/ (CSV) and seaice_analysis/ plus monthly GeoTIFFs (~1 GB). Daily GeoTIFFs, images and shapefiles were skipped (browse/derived products, large file counts).
Source: https://noaadata.apps.nsidc.org/NOAA/G02135/

Downloads last month: 15

Total file size:

29.2 GB

Sea-ice observation / validation datasets (mirror)

Satellite observations (obs/satellite/)

obs/satellite/osisaf_osi-450-a1/ - EUMETSAT OSI SAF Global Sea Ice Concentration CDR v3.1 (OSI-450-a1)

obs/satellite/unibremen_amsr2-asi-6250/ - University of Bremen AMSR2 ASI sea ice concentration 6.25 km v5.4

obs/satellite/awi_cs2smos/ - AWI CryoSat-2/SMOS merged sea ice thickness (CS2SMOS) v2.06

obs/satellite/esacci_sea-ice-concentration/ - ESA Sea Ice CCI High(er)-Resolution Sea Ice Concentration CDR v3.0 (SSM/I & SSMIS, 12.5 km)

obs/satellite/esacci_sea-ice-thickness/ - ESA Sea Ice CCI sea ice thickness L3C v4.0 (ERS-2, Envisat, CryoSat-2)

obs/satellite/nsidc_g02202-v6/ - NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 6 (G02202)

obs/satellite/nsidc_atl20-v005/ - ICESat-2 ATL20 Daily and Monthly Gridded Sea Ice Freeboard, Version 5

obs/satellite/nsidc_nsidc-0116-v4.1/ - Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vectors, Version 4 (NSIDC-0116, files v4.1)

Model reanalysis (reanalysis/)

reanalysis/psc_piomas-v2.1/ - PIOMAS (Pan-Arctic Ice Ocean Modeling and Assimilation System) v2.1 thickness and volume

Derived indices (derived-index/)

derived-index/nsidc_g02135-v4/ - NOAA/NSIDC Sea Ice Index, Version 4 (G02135)