Imaging · collection · 2024
MERRA2_CNN_HAQAST bias corrected global hourly surface total PM2.5 mass concentration, V1 (MERRA2_CNN_HAQAST_PM25)
Listed in NASA Earthdata CMR and NASA Data Portal — shown once because both records carry DOI 10.5067/ockk5hcfw5n3
This product provides MERRA-2 bias-corrected global hourly surface total PM2.5 mass concentration with the same horizontal spatial resolution as MERRA-2, covering a temporal range from 2000 to 2024.
Description
It is derived using a machine learning (ML) approach with a convolutional neural network (CNN) method and is specifically developed for the NASA Health and Air Quality Applied Sciences Team (HAQAST). The dataset consists of two parameters: MERRA2_CNN_Surface_PM25 and QFLAG.
MERRA2_CNN_Surface_PM25, a 3-dimensional variable (time, latitude, longitude), represents the surface PM2.5 concentrations in µg/m³. QFLAG denotes the quality of data at each grid point, where 4 indicates the highest quality and 1 indicates the lowest quality. It is recommended to use QFLAG values of 3 and 4 for quantitative analysis.
Links
Get the data
- Resource disc.gsfc.nasa.gov/datacollection/MERRA2_CNN_HAQAST_PM25_1.html ↗
Access the dataset landing page from the GES DISC website.
landing page · download · from NASA CMR, data nasa gov
- Resource disc.gsfc.nasa.gov/information/howto ↗
Documentation with step-by-step instructions on accessing and reading data
documentation · download · from NASA CMR, data nasa gov
- README Document docserver.gesdisc.eosdis.nasa.gov/public/project/HAQAST/Pawan_Gupta/README_MERRA2_CNN_HAQAST_PM2… ↗
documentation · download · from NASA CMR, data nasa gov
- Original Metadata cmr.earthdata.nasa.gov/search/concepts/C3094710982-GES_DISC.iso19115 ↗
download · from data nasa gov
- Access the data via HTTPS. acdisc.gesdisc.eosdis.nasa.gov/data/HAQAST/MERRA2_CNN_HAQAST_PM25.1 ↗
download · from NASA CMR
- search.earthdata.nasa.gov /search/granules?p=C3094710982-GES_DISC ↗
Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data.
download · from NASA CMR
- Resource github.com/Alqamah-Sayeed/MERRA2-ML-PM2.5 ↗
download · project · from data nasa gov, NASA CMR
- Resource acdisc.gesdisc.eosdis.nasa.gov/opendap/HAQAST/MERRA2_CNN_HAQAST_PM25.1/contents.html ↗
download · from data nasa gov
- Resource giovanni.gsfc.nasa.gov/giovanni ↗
The GES-DISC Interactive Online Visualization ANd aNalysis Interface (Giovanni) is a web-based tool that allows users to interactively visualize and analyze data.
download · preview image · from data nasa gov, NASA CMR
- PNG docserver.gesdisc.eosdis.nasa.gov/public/project/Images/MERRA2_CNN_HAQAST_PM25_1.png ↗
The MERRA-2 bias corrected surface total PM2.5 mass concentration for 00:30Z Jan 1, 2023.
download · preview image · from data nasa gov, NASA CMR
Where it is published
- NASA Data Portal dataset page data.nasa.gov/dataset/merra2-cnn-haqast-bias-corrected-global-hourly-surface… ↗
landing page · from data nasa gov
- DOI doi.org/10.5067/ockk5hcfw5n3 ↗
DOI / persistent id · from NASA CMR
Catalogue records · 4
- Access the data via the OPeNDAP protocol. cmr.earthdata.nasa.gov/virtual-directory/collections/C3094710982-GES_DISC ↗
metadata API · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C3094710982-GES_DISC.umm_json ↗
metadata API · from NASA CMR
- CKAN API data.nasa.gov/api/3/action/package_show?id=8038a5eb-3ba4-4175-81c0-fbf0f7a47… ↗
metadata API · from data nasa gov
- CMR record cmr.earthdata.nasa.gov/search/concepts/C3094710982-GES_DISC.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- Air Quality · Data Analysis · NOT APPLICABLE · Particulate Matter · Particulate Matter (Pm 2.5)
Provenance · 2 source records, 20 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C3094710982-GES_DISC | 12 d ago | JSON v1 |
| NASA Data Portal | 8038a5eb-3ba4-4175-81c0-fbf0f7a47d7f | 9 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| 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:medicine-health | 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/aerosols/particulate-matter | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/air-quality | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/human-dimensions/public-health/environmental-health-factors/particulate-matter-pm-2-5 | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:data-analysis | 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 |