Version 4 Aquarius L2 Swath Single Orbit Soil Moisture Data, and Version 4 Aquarius L3 Gridded 1-Degree Soil Moisture data are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The Level-2 data set contains global soil moisture estimates. The Level-3 data sets contain gridded daily, weekly, monthly, seasonal, and annual global soil moisture estimates.
DOI:10.5067/Aquarius/AQ2_SM.004
DOI:10.5067/Aquarius/AQ3_DYSM.004
DOI:10.5067/Aquarius/AQ3_WKSM.004
DOI:10.5067/Aquarius/AQ3_MOSM.004
DOI:10.5067/Aquarius/AQ3_SNSM.004
DOI:10.5067/Aquarius/AQ3_ANSM.004
The new climatology data sets, also available from NSIDC DAAC, contain global soil moisture climatology estimates for both monthly and seasonal composites.
Aquarius L3 Gridded 1-Degree Monthly Soil Moisture Climatology
DOI:10.5067/Aquarius/AQ3_MCSM.004
Aquarius L3 Gridded 1-Degree Seasonal Soil Moisture Climatology
DOI:10.5067/Aquarius/AQ3_SCSM.004