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The dataset viewer is not available for this split.
Cannot load the dataset split (in streaming mode) to extract the first rows.
Error code:   StreamingRowsError
Exception:    TypeError
Message:      Couldn't cast array of type
struct<long_name: string, units: string, comment1: string, comment2: string, _FillValue: string>
to
{'long_name': Value('string'), 'units': Value('string'), 'comment': Value('string'), '_FillValue': Value('string')}
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 478, 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 2818, in __iter__
                  for key, example in ex_iterable:
                                      ^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2355, in __iter__
                  for key, pa_table in self._iter_arrow():
                                       ~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2380, 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 536, in _iter_arrow
                  for key, pa_table in iterator:
                                       ^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 419, 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/json/json.py", line 343, in _generate_tables
                  self._cast_table(pa_table, json_field_paths=json_field_paths),
                  ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 132, in _cast_table
                  pa_table = table_cast(pa_table, self.info.features.arrow_schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2369, in table_cast
                  return cast_table_to_schema(table, schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2303, in cast_table_to_schema
                  cast_array_to_feature(
                  ~~~~~~~~~~~~~~~~~~~~~^
                      table[name] if name in table_column_names else pa.array([None] * len(table), type=schema.field(name).type),
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                      feature,
                      ^^^^^^^^
                  )
                  ^
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 1852, in wrapper
                  return pa.chunked_array([func(chunk, *args, **kwargs) for chunk in array.chunks])
                                           ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2149, in cast_array_to_feature
                  raise TypeError(f"Couldn't cast array of type\n{_short_str(array.type)}\nto\n{_short_str(feature)}")
              TypeError: Couldn't cast array of type
              struct<long_name: string, units: string, comment1: string, comment2: string, _FillValue: string>
              to
              {'long_name': Value('string'), 'units': Value('string'), 'comment': Value('string'), '_FillValue': Value('string')}

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MACDA — ARCO Format

Analysis-Ready and Cloud Optimized Zarr conversion of the MACDA v2.0. reanalysis (Valeanu et al. 2026), covering Mars Years 24–35.

Variables

Variable Description Units
temp Atmospheric temperature K
uwind Zonal wind m s-1
vwind Meridional wind m s-1
psurf Surface pressure Pa
tsurf Surface temperature K
coldust Column dust optical depth 1
dustmmr Dust mass mixing ratio (3D) kg kg-1
geop Geopotential m2 s-2
omega Vertical velocity Pa s-1
co2ice Surface CO2 ice kg m-2
swflux Shortwave surface flux W m-2
lwflux Longwave surface flux W m-2

Citation

Bhattacharya, A. (2026). ARCO-MACDA: Analysis-Ready Cloud-Optimized MACDA Reanalysis. https://doi.org/10.57967/hf/8771

Valeanu, A.; Rajendran, K.; Montabone, L.; Read, P.L. (2026): Mars Analysis Correction Data Assimilation (MACDA): Atmospheric and surface fields produced from assimilated MGS/TES, ODY/THEMIS, and MRO/MCS observations, v2.0. NERC EDS Centre for Environmental Data Analysis, 30 January 2026. doi:10.5285/cd037a9ea387438fabf4d674dbe53088. https://dx.doi.org/10.5285/cd037a9ea387438fabf4d674dbe53088

Read, P. L., A. Valeanu, Tao Ruan, L. Montabone, S. R. Lewis, and R. M. B. Young. "MACDA II: A New Reanalysis for the Martian Atmosphere Using Vertically-Resolved Dust Opacity Observations." (2022).

Battalio, Michael, Istvan Szunyogh, and Mark Lemmon. "Energetics of the martian atmosphere using the Mars Analysis Correction Data Assimilation (MACDA) dataset." Icarus 276 (2016): 1-20.

BibTeX

@misc{bhattacharya2026arco_macda, author = {Bhattacharya, Ananyo}, title = {{ARCO-MACDA}: Analysis-Ready Cloud-Optimized {MACDA} Reanalysis}, year = {2026}, publisher = {Hugging Face}, doi = {https://doi.org/10.57967/hf/8771}, url = {https://huggingface.co/datasets/ananyo01/ARCO-MACDA} }

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