Imaging · collection · 2022
MERRA-2 tavgC_3d_ltm_Np: 3d, Long Term Mean 3-Dimensional Meteorological Fields based on 1991-2020 V2 (M2TCNPLTM)
Listed in NASA Earthdata CMR and NASA Data Portal — shown once because both records carry DOI 10.5067/qtdn06jju27t
M2TCNPLTM (or tavgC_3d_ltm_Np) is a 3-dimensional monthly data collection for climatological long term mean and standard deviation representing the interannual variability on a monthly timescale, derived from monthly Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA-2) datasets.
Description
V2 of this data collection is calculated with data from January 1991 to December 2020. In contrast, V1, the original version, is computed with data from an earlier 30-year time of 1981-2010.
This collection consists of meteorological diagnostics at 12 vertical pressure levels (e.g.,850 hPa, 500hPa, and 200 hPa), such as air temperature, wind components, and both relative and specific humidity. MERRA-2 is the latest version of global atmospheric reanalysis for the satellite era produced by the NASA Global Modeling and Assimilation Office (GMAO) using the Goddard Earth Observing System Model (GEOS) version 5.12.4.
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The dataset covers the period of 1980-present, with a latency of ~3 weeks after the end of the previous month. Data Reprocessing: Please check “Records of MERRA-2 Data Reprocessing and Service Changes”, linked from the “Documentation” tab on this page. Note that a reprocessed data filename is different from the original filename.
MERRA-2 Mailing List: Sign up to receive information on reprocessing of data, changes to tools and services, as well as data announcements from GMAO. Contact the GES DISC Help Desk (gsfc-dl-help-disc@mail.nasa.gov) to be added to the list. Questions: If you have a question, please read the "MERRA-2 File Specification Document'', “MERRA-2 Data Access – Quick Start Guide”, and FAQs linked from the ”Documentation” tab on this page for more information.
If these documents do not answer your question, you may post your question to the NASA Earthdata Forum (forum.earthdata.nasa.gov) or email the GES DISC Help Desk (gsfc-dl-help-disc@mail.nasa.gov).
Links
Get the data
- Resource disc.gsfc.nasa.gov/datacollection/M2TCNPLTM_2.html ↗
Access the dataset landing page from the GES DISC website.
landing page · download · from NASA CMR, data nasa gov
- Access the data via the OPeNDAP protocol. cmr.earthdata.nasa.gov/virtual-directory/collections/C2531964023-GES_DISC ↗
metadata API · download · from NASA CMR, data nasa gov
- README Document goldsmr4.gesdisc.eosdis.nasa.gov/data/MERRA2_CLIM/M2TCNPLTM.2/doc/README_MERRA2_CLIMSTAT_V2.pdf ↗
documentation · download · from NASA CMR, data nasa gov
- PDF docserver.gesdisc.eosdis.nasa.gov/public/project/MERRA/Records_MERRA-2_Data_Reprocessing_and_Ser… ↗
Records of MERRA-2 Data Reprocessing and Service Changes
documentation · download · from NASA CMR, data nasa gov
- MERRA-2 Data Access – Quick Start Guide disc.gsfc.nasa.gov/information/mission-project?title=MERRA-2 ↗
documentation · download · from NASA CMR, data nasa gov
- FAQs about MERRA-2 data access disc.gsfc.nasa.gov/information/faqs?keywords=MERRA-2&page=1 ↗
documentation · download · from NASA CMR, data nasa gov
- Resource disc.gsfc.nasa.gov/information/howto?tags=MERRA ↗
Documents with exmaple on how to read and plot MERRA-2 data.
documentation · download · from NASA CMR, data nasa gov
- File Specification Document gmao.gsfc.nasa.gov/media/publications/zbly36ziNFDFbmYmvhQeVqPhUo/Collow1466.pdf ↗
documentation · download · from NASA CMR, data nasa gov
- Original Metadata cmr.earthdata.nasa.gov/search/concepts/C2531964023-GES_DISC.iso19115 ↗
download · from data nasa gov
- Access the data via HTTPS. goldsmr4.gesdisc.eosdis.nasa.gov/data/MERRA2_CLIM/M2TCNPLTM.2 ↗
download · from NASA CMR
- search.earthdata.nasa.gov /search/granules?p=C2531964023-GES_DISC ↗
Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data.
download · from NASA CMR
- Resource gmao.gsfc.nasa.gov/gmao-products/merra-2/documentation_merra-2 ↗
The NASA GMAO MERRA-2 Data Documentation and FAQs
download · project · from data nasa gov, NASA CMR
- PNG docserver.gesdisc.eosdis.nasa.gov/public/project/Images/M2TCNPLTM_2.png ↗
M2TCNPLTM sample image: Monthly climatology of relative humidity after moist (RH) at 700hPa, Jan. The base period of the climatology is 1991-2020.
download · preview image · from data nasa gov, NASA CMR
Where it is published
- NASA Data Portal dataset page data.nasa.gov/dataset/merra-2-tavgc-3d-ltm-np-3d-long-term-mean-3-dimensiona… ↗
landing page · from data nasa gov
- DOI doi.org/10.5067/qtdn06jju27t ↗
DOI / persistent id · from NASA CMR
Catalogue records · 3
- CKAN API data.nasa.gov/api/3/action/package_show?id=a7afbbac-e35c-42fd-88a5-817d2d72f… ↗
metadata API · from data nasa gov
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C2531964023-GES_DISC.umm_json ↗
metadata API · from NASA CMR
- CMR record cmr.earthdata.nasa.gov/search/concepts/C2531964023-GES_DISC.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- Atmospheric Temperature · Atmospheric Winds · Geopotential Height · NOT APPLICABLE · Relative Humidity · Specific Humidity · The second Modern-Era Retrospective analysis for Research and Applications · Vertical Wind Velocity/Speed
- From keywords
- Astronomy & Astrophysics · Earth & Environmental Science · Ocean & Atmospheric Science · Physics
- Inferred from text
- Climate change science 71%
Provenance · 2 source records, 23 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C2531964023-GES_DISC | 8 d ago | JSON v1 |
| NASA Data Portal | a7afbbac-e35c-42fd-88a5-817d2d72fce2 | 5 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3702 | 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:earth-environmental | 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/altitude/geopotential-height | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-temperature | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-water-vapor/water-vapor-indicators/humidity/relative-humidity | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-water-vapor/water-vapor-indicators/humidity/specific-humidity | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-winds | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-winds/wind-dynamics/vertical-wind-velocity-speed | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:merra-2 | 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 |