Here you will find global grids of loading derived from the GLDAS water storage model (http://disc.sci.gsfc.nasa.gov/services/grads-gds/hydrology/documentation/hydro_doc.shtml)
This is a GGFC Operational Product.
The data here are updated quarterly at a minimum.
The 3-dimensional displacements have been derived using the method originally outlined in van Dam and Wahr . (van Dam, T. and J. Wahr, Displacements of the Earth's surface due to atmospheric loading: Effects on Gravity and Baseline Measurements, J. Geophys. Res., 92, 1281-1286, 1987.)
For more information on the GLDAS mass model, the user is referred to http://disc.sci.gsfc.nasa.gov/hydrology/documentation.
PLEASE NOTE: Time series for any individual grid location contain a long-term trend. Users are advised to remove this trend from their data before interpreting the results.
The data provided here are first organized by reference frame. Within each reference frame directory the data are organized by year, then by day. Each day file contains 2 epochs of data at the following epochs: 06, 18.
Each individual file contains the global (2.5 deg. X 2.5 deg) 3-dimensional surface displacement (in mm) for the epoch corresponding to the file name.
Each file can be read using the following algorithm (or something equivalent) where dvt is surface displacement to the north,dvl is surface displacement to the east, and du is surface displacement in the radial direction:do imo=1,12