This data set is only available for a restricted user group, please contact us if you want to access these data.
Coverage, spatial and temporal resolution
Period and temporal resolution:
- June 19, 2002 to Oct. 03, 2011
Coverage and spatial resolution:
- Global, separately for ascending and descending satellite overpasses
- Spatial resolution: 0.25° x 0.25°, cartesian grid
- Geographic longitude: 179.875°W to 179.875°E
- Geographic latitude: 89.875°S to 89.875°N
- Dimension: 720 rows x 1440 columns
- Altitude: following terrain
This data set contains a quality flags, a retrieval error and canopy optical depth separately for soil moisture data sets of the two used AMSR-E frequency channels (see parameters).
The data set is completed with the retrieved surface temperature (derived from 36.5 GHz brightness temperatures, see references: Holmes et al.)
Due to lacking documentation we cannot give complete information about the quality flag. It is clear, though, that these flag open water, ice/snow/frozen ground, and (too) dense vegetation. For the latter we recommend to consider the canopy optical depths which are also provided along with the data sets.
We note, that the soil moisture retrieval method used here, is of limited use particularly in regions covered by dense vegetation such as rain forests. These areas are therefore often flagged as unreliable data and/or show a large retrieval noise.
We recommend to take a look at the references for more details about data quality, validation, and inter-comparison studies.
Richard De Jeu & Thomas Holmes
Department of Eco-Hydrology, Faculty of Earth and Life Science
Vrjie Universiteit Amsterdam, Amsterdam, The Netherlands
email: richard.de.jeu (at) falw.vu.nl & thomas.holmes (at) falw.vu.nl
ICDC / CEN / University of Hamburg
email: stefan.kern (at) uni-hamburg.de
Upon using this data please cite as follows:
Owe, M., R. A. M., de Jeu, and T. R. H. Holmes (2008). Multi-Sensor historical Climatology of satellite-derived global land surface moisture, J Geophys. Res., 113, F01002, doi:1029/2007JF000769, distributed in rotated netCDF format by icdc.cen.uni-hamburg.de