Monthly Ozone Tendency Assimilations on Pressure Levels

1980 to present monthly mean data from the NASA MERRA-2 atmospheric reanalysis. The dataset contains assimilated ozone tendencies, such as total ozone analysis tendency and chemical/moist/dynamic process contributions, across 42 pressure levels. It is produced by NASA's Global Modeling and Assimilation Office (GMAO) using the GEOS model.

Use Cases

• Analyze the total ozone analysis tendency over time to study long-term stratospheric ozone changes.
• Model ozone chemistry by isolating the tendency of odd oxygen mixing ratio due to chemical processes.
• Investigate ozone transport by examining the tendency of ozone due to dynamics across pressure levels.
• Study ozone interactions with hydrology using the tendency of odd oxygen due to moist processes.
• Validate reanalysis models by comparing variance parameters for specific ozone tendency fields.

Strengths

• Covers a multi-decadal period from 1980 to present, enabling long-term trend analysis.
• Provides data on 42 distinct pressure levels for detailed vertical atmospheric profiling.
• Assimilates multiple specific ozone tendency processes (chemical, moist, dynamic) for mechanistic studies.

Limitations

• Data has a latency of approximately 3 weeks after each month, limiting real-time analysis.
• Reprocessing events create filename inconsistencies that require user attention.
• Specific row counts, file sizes, and spatial resolution details beyond '0.625 x 0.5 degree' are not provided in the input.

Provenance

Source

NASA Global Modeling and Assimilation Office (GMAO) via the Goddard Earth Sciences Data and Information Services Center (GES DISC).

Collection Method

Generated by the Goddard Earth Observing System Model (GEOS) version 5.12.4 as part of the MERRA-2 global atmospheric reanalysis.

Time Range

1980 to present.

Freshness

Updated monthly with ~3-week latency.

Geography

Global coverage.