Array · collection · 2025
ENVISAT MERIS Level-4 Global Mapped Garver-Siegel-Maritorena Model (GSM) Data, version 2022.0
Listed in NASA Earthdata CMR
The GSM data suite provides ocean-color fields derived by inverting water-leaving reflectance with the Garver–Siegel–Maritorena (GSM/GSM01) semi-analytical model.
Description
GSM’s advantage is that it retrieves multiple optical properties simultaneously from a reflectance spectrum and offers a more physics-based alternative to simple band-ratio chlorophyll algorithms. Geophysical variables in this suite include: - adg_443_gsm – Absorption by gelbstoff and detrital material at 443 nm, GSM algorithm (m⁻¹) - bbp_443_gsm – Particulate backscattering at 443 nm, GSM algorithm (m⁻¹) - chl_gsm – Chlorophyll-a concentration, GSM model (mg m⁻³)
Links
Get the data
- search.earthdata.nasa.gov /search/granules?p=C3288082302-OB_CLOUD ↗
Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data.
download · from NASA CMR
- NASA's Ocean Color Web - Data Distribution Site oceandata.sci.gsfc.nasa.gov/directdataaccess/Level-4%20Mapped/MERIS ↗
download · from NASA CMR
Where it is published
- DOI doi.org/10.5067/envisat/meris/rr/l4m/gsm/2022.0 ↗
DOI / persistent id · from NASA CMR
Documentation and papers
- View the version history of this product. oceancolor.gsfc.nasa.gov/data/reprocessing ↗
documentation · from NASA CMR
- ENVISAT Homepage earthdata.nasa.gov/data/platforms/space-based-platforms/ENVISAT ↗
documentation · from NASA CMR
- MERIS Homepage earthdata.nasa.gov/data/instruments/MERIS ↗
documentation · from NASA CMR
- nasa.github.io /oceandata-notebooks ↗
Satellite data procesing can be difficult. We're here to help! Visit the Oceandata Help Hub to navigate learning content for accessing visualizing, and analyzing data products.
documentation · from NASA CMR
- oceancolor.gsfc.nasa.gov /files/atbd/legacy/atbd-obdaac-special-products.pdf ↗
Algorithm Theoretical Basis Document for Garver-Siegel-Maritorena Model (GSM)
documentation · from NASA CMR
Catalogue records · 3
- oceandata.sci.gsfc.nasa.gov /opendap/MERIS/L4SMI ↗
OPeNDAP Site for ENVISAT MERIS Standard Mapped Image (SMI) Product
metadata API · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C3288082302-OB_CLOUD.umm_json ↗
metadata API · from NASA CMR
- CMR record cmr.earthdata.nasa.gov/search/concepts/C3288082302-OB_CLOUD.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- Absorption · Chlorophyll Concentration · Environmental Satellite · Medium Resolution Imaging Spectrometer · Phytoplankton · Scattering · Surface Water · Water Quality
Provenance · 1 source records, 17 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C3288082302-OB_CLOUD | 7 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[instrument].gcmd_instrument:meris | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biosphere/ecosystems/aquatic-ecosystems/plankton/phytoplankton | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/ocean-optics/absorption | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/ocean-optics/chlorophyll/chlorophyll-concentration | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/ocean-optics/scattering | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science-services/environmental-advisories/hydrological-advisories/water-quality | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/terrestrial-hydrosphere/surface-water | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:envisat | 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 |
| 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 |