M2-SCREAM: Monthly Stratospheric Constituent Fields with Uncertainties

M2-SCREAM is a NASA reanalysis product providing assimilated fields for hydrochloric acid, nitric acid, stratospheric water vapor, nitrous oxide, and ozone. It offers global data at 0.5° by 0.625° resolution at three-hourly frequencies from September 2004 to September 2024. The dataset includes calculated assimilation uncertainties for each constituent, produced by NASA's Global Modeling and Assimilation Office.

Use Cases

• Modeling stratospheric ozone depletion based on assimilated ozone and nitric acid fields
• Analyzing trends in stratospheric water vapor based on three-hourly global data
• Assessing uncertainty in atmospheric constituent predictions based on provided statistical assimilation uncertainties
• Studying the impact of satellite data version changes on reanalysis continuity based on documented discontinuities

Strengths

• Provides assimilated fields for five key atmospheric constituents
• Offers global coverage at 0.5° by 0.625° resolution
• Includes calculated assimilation uncertainties for each constituent
• Covers a 20-year time range from 2004 to 2024

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download
• Column-level documentation is absent; field semantics must be inferred after download
• Data product updates in 2024 introduced discontinuities in assimilated H2O and N2O

Provenance

Source

NASA's Global Modeling and Assimilation Office (GMAO)

Collection Method

Generated by assimilating MLS and OMI satellite retrievals into the GEOS Constituent Data Assimilation System driven by MERRA-2 meteorological fields.

Time Range

2004/09/01 to 2024/09/30

Freshness

Last updated 2026-03-13 00:54:10.586812; freshness should be verified

Geography

Global