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ESA Soil Moisture Climate Change Initiative (Soil_Moisture_cci): COMBINED product, Version 08.1

Update Frequency: Not Planned
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2023-10-11
Download Stats: last 12 months
Dataset Size: 16.13K Files | 21GB


The Soil Moisture CCI COMBINED dataset is one of three datasets created as part of the European Space Agency's (ESA) Soil Moisture Essential Climate Variable (ECV) Climate Change Initiative (CCI) project. The COMBINED product has been created by directly merging Level 2 scatterometer ('active' remote sensing) and radiometer ('passive' remote sensing) soil moisture products derived from the AMI-WS, ASCAT, SMMR, SSM/I, TMI, AMSR-E, WindSat, FY-3B, FY-3C, FY3D, AMSR2, SMOS, GPM and SMAP satellite instruments. PASSIVE and ACTIVE products have also been created.

The v08.1 COMBINED product, provided as global daily images in NetCDF-4 classic file format, presents a global coverage of surface soil moisture at a spatial resolution of 0.25 degrees. It is provided in volumetric units [m3 m-3] and covers the period (yyyy-mm-dd) 1978-11-01 to 2022-12-31. For information regarding the theoretical and algorithmic base of the product, please see the Algorithm Theoretical Baseline Document. Additional reference documents and information relating to the dataset can also be found on the CCI Soil Moisture project website.

The data set should be cited using the following references:

1. Gruber, A., Scanlon, T., van der Schalie, R., Wagner, W., and Dorigo, W. (2019). Evolution of the ESA CCI Soil Moisture climate data records and their underlying merging methodology, Earth Syst. Sci. Data, 11, 717–739,

2. Dorigo, W.A., Wagner, W., Albergel, C., Albrecht, F., Balsamo, G., Brocca, L., Chung, D., Ertl, M., Forkel, M., Gruber, A., Haas, E., Hamer, D. P. Hirschi, M., Ikonen, J., De Jeu, R. Kidd, R. Lahoz, W., Liu, Y.Y., Miralles, D., Lecomte, P. (2017). ESA CCI Soil Moisture for improved Earth system understanding: State-of-the art and future directions. In Remote Sensing of Environment, 2017, ISSN 0034-4257,

3. Preimesberger, W., Scanlon, T., Su, C. -H., Gruber, A. and Dorigo, W., "Homogenization of Structural Breaks in the Global ESA CCI Soil Moisture Multisatellite Climate Data Record," in IEEE Transactions on Geoscience and Remote Sensing, vol. 59, no. 4, pp. 2845-2862, April 2021, doi: 10.1109/TGRS.2020.3012896.

Citable as:  Dorigo, W.; Preimesberger, W.; Hahn, S.; Van der Schalie, R.; De Jeu, R.; Kidd, R.; Rodriguez-Fernandez, N.; Hirschi, M.; Stradiotti, P.; Frederikse, T.; Gruber, A.; Madelon, R. (2023): ESA Soil Moisture Climate Change Initiative (Soil_Moisture_cci): COMBINED product, Version 08.1. NERC EDS Centre for Environmental Data Analysis, date of citation.
Abbreviation: Not defined
Keywords: ESA, Soil Moisture, CCI, Combined


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data were processed by the ESA CCI Soil Moisture project team and transferred to CEDA for the ESA CCI Open Data Portal Project

Data Quality:
See the Soil Moisture CCI documentation for information on data quality
File Format:
The data are provided in NetCDF format.

Process overview

This dataset was generated by a combination of instruments deployed on platforms and computations as detailed below.

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: NIMBUS 7 Satellite
Mobile Platform Operation 2 Mobile Platform Operation for: Defense Meteorological Satellite Program (DMSP) Satellites
Mobile Platform Operation 3 Mobile Platform Operation for: ERS-1
Mobile Platform Operation 4 Mobile Platform Operation for: ERS-2
Mobile Platform Operation 5 Mobile Platform Operation for: Metop-A
Mobile Platform Operation 6 Mobile Platform Operation for: Metop-B
Mobile Platform Operation 7 Aqua Satellite orbit details
Mobile Platform Operation 8 Coriolis Satellite Orbit Details
Mobile Platform Operation 9 SMOS satellite orbit details
Mobile Platform Operation 10 TRMM satellite orbit details
Mobile Platform Operation 11 Mobile Platform Operation for: Metop-C

Computation Element: 1

Title Algorithm for the ESA Soil Moisture Climate Change Initiative, v08.1
Abstract The ESA Soil Moisture Climate Change Initiative is deriving information on soil moisture from active and passive satellite sensors. For information on the algorithm see the Algorithm Theoretical Baseline Document.
Input Description None
Output Description None
Software Reference None
Output Description


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