Who publishes Chlorophyll-a?

Office for Coastal Management, part of National Oceanic and Atmospheric Administration, Department of Commerce, publishes this dataset on Data.gov.

How often is it updated?

The publisher does not list a schedule. The last update was on 04/30/2026.

How do I download it?

It is available as ZIP. Use the links in Files and access, which open the official government source.

Checked Oct 30, 2026

Federal dataMaps & Geospatial

Chlorophyll-a

Name: Chlorophyll-a
Creator: National Oceanic and Atmospheric Administration, Department of Commerce

Published by Office for Coastal Management · Updated 04/30/2026

Official source Download ZIP

Last updated: 04/30/2026
Update frequency: Not listed
Formats: 1; ZIP
Coverage: Nationwide; Federal data

About this dataset

This algorithm returns the near-surface concentration of chlorophyll-a (chlor_a) in mg m-3, calculated using an empirical relationship derived from in situ measurements of chlor_a and remote sensing reflectances (Rrs) in the blue-to-green region of the visible spectrum. The implementation is contingent on the availability three or more sensor bands spanning the 440 - 670 nm spectral regime. The algorithm is applicable to all current ocean color sensors. The chlor_a product is included as part of the standard Level-2 OC product suite and the Level-3 CHL product suite. The data represents monthly mean climatologies on a monthly data time scale for a ten-year period between 2007 and 2016. These climatologies were created using the 'Create Climatological Rasters for NASA OceanColor L3 SMI Product' in the Marine Geospatial Ecology Toolbox for ArcGIS Desktop 10.1-10.6. Available for download here: http://mgel2011-kvm.env.duke.edu/mget/download/.

Files and access

Links open the official government source

https://marinecadastre.gov/downloads/data/mc/Chlorophylla.zipmarinecadastre.govZIP
https://marinecadastre.gov/data/marinecadastre.govWeb page
GCMD Keyword Forum Pageforum.earthdata.nasa.govWeb page
Full Metadata Recordfisheries.noaa.govWeb page
NOAA Office for Coastal Management Websitecoast.noaa.govWeb page

Links open outside websites we do not control.

Frequently asked questions

Who publishes Chlorophyll-a?: Office for Coastal Management, part of National Oceanic and Atmospheric Administration, Department of Commerce, publishes this dataset on Data.gov.
How often is it updated?: The publisher does not list a schedule. The last update was on 04/30/2026.
How do I download it?: It is available as ZIP. Use the links in Files and access, which open the official government source.

Where this catalog comes from

Data.gov CatalogU.S. General Services Administration
State and local open data portalsSocrata Discovery API
State and city CKAN portalsCalifornia, Virginia, Boston, Houston and more
Government ArcGIS Hub sitesCity and county GIS data

Catalog checked 10/24/2026

We list dataset descriptions only. Downloads and APIs link straight to the official government source, which holds the current version and its terms of use.

Source: Data.gov · Last updated 10/24/2026 · Listing only; the data stays with the publisher