The Modern Era Retrospective-analysis for Research and Applications (MERRA) products are generated using Version 5.2.0 of the GEOS-5 DAS with the model and analysis each at 1/2x2/3 degrees resolution. Three-dimensional analyses are generated every 6 hours, and 3- dimensional diagnostics, describing the radiative and physical properties of the atmosphere, are 3-hourly. The product suite includes analyses on the native vertical grid as well on pressure surfaces. Two-dimensional data, including surface, fluxes, and vertical integrals, are produced hourly. The product suite includes monthly and monthly diurnal files. The MERRA production is being conducted in 3 separate streams, 1979 - 1989; 1989 - 1998; 1998 - present. Data are being uploaded to the MDISC after undergoing quality assurance in the GMAO. Please review the MERRA Mainstream and Spinup Data documentation for access to the MERRA Spinup data.
Data Subsetter is currently available for MERRA data only. The subsetter allows users to make various selections to subset data in a simple, easy to use interface. The interface contains a spatial, temporal, parameter, time step and vertical level selection so users can download in HDF or NetCDF format the exact data they need. The subsetter is currently available for MERRA daily and monthly data products with an additional optio to make mean data files for the daily products. More will be added in the future as additional data products become available in MDISC.
Mirador is a new search and order Web interface being developed at the GES DISC for our data users. It has a drastically simplified, clean interface and employs the Google mini appliance for metadata keyword searches. Other features include quick response, data file hit estimator, Gazetteer (geographic search by feature name capability), data subsetting functionality, data format conversion and an interactive shopping cart. A user can also search for data in a drill down method by Project or by Science Focus.