Imaging · collection · 2022
M2-SCREAM: Monthly,Model-Level,Assimilated Constituent Fields uncertainties
Listed in NASA Earthdata CMR and NASA Data Portal — shown once because both records carry DOI 10.5067/7xrijo9op8pe
The MERRA-2 Stratospheric Composition Reanalysis of Aura MLS (M2-SCREAM) products produced at NASA’s Global Modeling and Assimilation Office (GMAO) are generated by assimilating MLS and OMI retrievals into the GEOS Constituent Data Assimilation System (CoDAS) driven by meteorological fields from MERRA-2.
Description
M2-SCREAM assimilates hydrochloric acid (HCl), nitric acid (HNO3), stratospheric water vapor (H2O), nitrous oxide (N2O) and ozone with a system equipped with a version of the GEOS general circulation model and a stratospheric chemistry model, StratChem.
Assimilated fields are provided globally at 0.5° by 0.625° resolution at three-hourly frequencies from 2004/09/01 to 2024/09/30. Assimilation uncertainties for each of the assimilated constituents are calculated from the CoDAS statistical output (Wargan et al., 2022) and provided as global full-resolution three-dimensional monthly files. Data product updates in March 2024, as a result of Aura MLS “duty cycle” of 190-GHz measurements, include reduced availability of H2O, N2O and HNO3 retrievals resulting in expected M2-SCREAM data quality degradation.
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However, preliminary analysis shows that the GEOS CoDAS handles the reduced temporal data coverage well, indicating that the GEOS model accurately propagates information from past observations. Data product updates in June 2024 resulting from MLS version upgrade to v5.0 include discontinuities in assimilated H2O (throughout the stratosphere) and N2O (in the lower stratosphere). To note: MLS water vapor is about 0.5 ppmv lower in v5.0, and the vertical range of assimilated N2O data is 100 hPa, extended down from 68 hPa.
GMAO is not aware of discontinuities in HCl, HNO3, and ozone related to the version switch.
Links
Get the data
- Resource disc.gsfc.nasa.gov/datasets/GMAO_M2SCREAM_MONTH_UNCERT_1/summary ↗
Access the dataset landing page from the GES DISC website.
landing page · download · from NASA CMR, data nasa gov
- README document docserver.gesdisc.eosdis.nasa.gov/public/project/Community/M2SCREAM/README.GMAO_M2SCREAM_MONTH_U… ↗
documentation · download · from NASA CMR, data nasa gov
- Original Metadata cmr.earthdata.nasa.gov/search/concepts/C2311994359-GES_DISC.iso19115 ↗
download · from data nasa gov
- Access the data via HTTP acdisc.gesdisc.eosdis.nasa.gov/data/M2SCREAM/GMAO_M2SCREAM_MONTH_UNCERT.1 ↗
download · from NASA CMR
- search.earthdata.nasa.gov /search/granules?p=C2311994359-GES_DISC ↗
Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data.
download · from NASA CMR
- PNG docserver.gesdisc.eosdis.nasa.gov/public/project/Community/M2SCREAM/M2SCREAM_media.png ↗
download · preview image · from data nasa gov, NASA CMR
- Resource acdisc.gesdisc.eosdis.nasa.gov/opendap/M2SCREAM/GMAO_M2SCREAM_MONTH_UNCERT.1 ↗
download · from data nasa gov
- Resource gmao.gsfc.nasa.gov ↗
download · project · from data nasa gov, NASA CMR
Where it is published
- NASA Data Portal dataset page data.nasa.gov/dataset/m2-scream-monthlymodel-levelassimilated-constituent-fi… ↗
landing page · from data nasa gov
- DOI doi.org/10.5067/7xrijo9op8pe ↗
DOI / persistent id · from NASA CMR
Catalogue records · 4
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C2311994359-GES_DISC.umm_json ↗
metadata API · from NASA CMR
- Access the data via the OPeNDAP protocol. cmr.earthdata.nasa.gov/virtual-directory/collections/C2311994359-GES_DISC ↗
metadata API · from NASA CMR
- CKAN API data.nasa.gov/api/3/action/package_show?id=94a773db-ae3c-4ea4-b1da-458f89f80… ↗
metadata API · from data nasa gov
- CMR record cmr.earthdata.nasa.gov/search/concepts/C2311994359-GES_DISC.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- NOT APPLICABLE · OBSERVATION BASED ANALYSES · Trace Gases/Trace Species
- From keywords
- Astronomy & Astrophysics · Chemistry · Earth & Environmental Science · Life Sciences · Ocean & Atmospheric Science · Physics
- Inferred from text
- Atmospheric sciences 71%
Provenance · 2 source records, 20 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C2311994359-GES_DISC | 8 d ago | JSON v1 |
| NASA Data Portal | 94a773db-ae3c-4ea4-b1da-458f89f80edb | 5 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3701 | enrichment · NASA CMR | taxonomy-embedding@1.0.0 | title+keywords+description (71%) |
| concepts[field].local:field:astronomy | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:chemistry | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:life-sciences | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:physics | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[instrument].gcmd_instrument:not-applicable | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-chemistry/trace-gases-trace-species | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:observation-based | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| created_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| license_text | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| publication_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| updated_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |