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|---|---|
| System name (version) | Modern Era Retrospective-analysis for Research and Applications version 2 (MERRA-2) (using Goddard Earth Observing System version 5.12.4) |
| Date of implementation | 12 October, 2015 |
2. Configuration | |
|---|---|
Earth system components included in the analysis system (e.g., ocean, sea-ice, land, etc.) | Assimilated and Interactive Aerosols. Observation-based precipitation driving the land surface and aerosol wet deposition except in the high latitudes (Reichle et al. 2017a) |
Horizontal resolution of the model, with indication of grid spacing in km (for the different Earth system component included in the model) | The model is run on a cubed sphere grid. Data are provided at 0.625° longitude by 0.5° latitude (576 by 361 grid points, approximately 50kmby 50km) |
Number of levels in the different Earth system components (for the different Earth system component included in the model) | 72 native model levels, also interpolated to 42 pressure levels |
| Frequency of the outputs | 2D variables at 1 hourly frequency, 3D variables at 3 hourly frequency, Analysis variables at 6-hourly frequency |
| Analysis fields (such as MSLP and 2m temperature) | |
| Two-dimensional average diagnostic fields (such as total precipitation) | |
| Top of the atmospheric model | 0.01 hPa |
| Number of analysis cycle per day | 4 |
| Earliest start date | 00Z 01 January 1980 |
| Integration time step | 900 seconds |
| Length and frequency of the longest forecast | 6 hours, only for the analysis cycle |
| Dataset latency | Data is usually available monthly by the 15th of the following month |
Additional comments:
Documentation: https://gmao.gsfc.nasa.gov/reanalysis/MERRA-2/docs
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