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ESA Soil Moisture Climate Change Initiative (Soil_Moisture_cci): 'Passive' Product, Version 02.1

Update Frequency: Not Planned
Latest Data Update: 2015-07-27
Status: Superseded
Online Status: ONLINE
Publication State: Published
Publication Date: 2018-06-07
Download Stats: last 12 months
Dataset Size: 12.85K Files | 6GB

This dataset has been superseded. See Latest Version here

The Soil Moisture CCI Passive dataset is one of the three datasets created as part of the European Space Agency's (ESA) Soil Moisture Essential Climate Variable (ECV) CCI project. The product has been created by fusing scatterometer and radiometer soil moisture products, merging data from the SMMR, SSM/I, TMI, AMSR-E, WindSat, and AMSR2 satellite instruments. 'Active' and 'Combined' products have also been created, the 'Active' product being a fusion of AMI-WS and ASCAT derived scatterometer and radiometer soil moisture products and the 'Combined Product' being a blended product based on the former two data sets.

The v02.1 Passive product presents a global coverage of surface soil moisture at a spatial resolution of 0.25 degrees. The product is provided in volumetric units [m3 m-3] and covers the period (yyyy-mm-dd) 1978-11-01 to 2013-12-31. It consists of global daily images stored within yearly folders and are NetCDF-4 classic file formatted. For information regarding the theoretical and algorithmic base of the product, please see the Algorithm Theoretical Baseline Document version or the paper by Wagner 2012, both available in the documentation section. An overview of all known errors of the dataset is provided in the Comprehensive Error Characterization Report. Other additional reference documents and information relating to the dataset can also be found on the CCI Soil Moisture project web site or within the Product Specification Document.

The data set should be cited using all three following references:
1. Liu, Y. Y., W. A. Dorigo, et al. (2012). "Trend-preserving blending of passive and active microwave soil moisture retrievals." Remote Sensing of Environment 123: 280-297.
2. Liu, Y. Y., Parinussa, R. M., Dorigo, W. A., De Jeu, R. A. M., Wagner, W., van Dijk, A. I. J. M., McCabe, M. F., Evans, J. P. (2011). Developing an improved soil moisture dataset by blending passive and active microwave satellite-based retrievals. Hydrology and Earth System Sciences, 15, 425-436
3. Wagner, W., W. Dorigo, R. de Jeu, D. Fernandez, J. Benveniste, E. Haas, M. Ertl (2012). Fusion of active and passive microwave observations to create an Essential Climate Variable data record on soil moisture. ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences (ISPRS Annals), Volume I-7, XXII ISPRS Congress, Melbourne, Australia, 25 August-1 September 2012, 315-321

Citable as:  Wagner, W.; Dorigo, W.; Chung, D.; Gruber, A.; Hahn, S.; Kidd, R.; Liu, Y.Y.; Mistelbauer, T.; Parinussa, R.; Paulik, C.; Reimer, C.; Van der Schalie, R.; De Jeu, R.; Melzer, T.; Vreugdenhil, M. (2018): ESA Soil Moisture Climate Change Initiative (Soil_Moisture_cci): 'Passive' Product, Version 02.1. Centre for Environmental Data Analysis, date of citation.
Abbreviation: Not defined
Keywords: ESA, Soil Moisture, CCI, Passive


Previous Info:

2018-06-29 This data forms part of the v02.1 Soil Moisture dataset (doi:10.5285/f4f77c55fd304ada9bfe2195927a053b.… Show More 2018-06-29 This data forms part of the v02.1 Soil Moisture dataset (doi:10.5285/f4f77c55fd304ada9bfe2195927a053b. ) Show Less

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.
This data forms part of the v02.1 Soil Moisture dataset (doi:10.5285/f4f77c55fd304ada9bfe2195927a053b. )

File Format:
The data files are stored in NetCDF-4 classic format.

Process overview

  • long_name: Day(100) or Night(110) Flag
  • var_id: dnflag
  • var_id: flag
  • long_name: Flag
  • long_name: Frequency Band
  • var_id: freqband
  • long_name: Observation Timestamp
  • var_id: t0
  • long_name: Satellite Mode
  • var_id: mode
  • long_name: Sensor
  • var_id: sensor
  • var_id: sm
  • units: m3 m-3
  • long_name: Volumetric Soil Moisture
  • var_id: sm_uncertainty
  • units: m3 m-3
  • long_name: Volumetric Soil Moisture Uncertainty

Co-ordinate Variables

  • units: degrees_north
  • standard_name: latitude
  • var_id: lat
  • units: degrees_east
  • standard_name: longitude
  • var_id: lon
  • standard_name: time
  • var_id: time
Temporal Range
Start time:
End time:
Geographic Extent