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Description

This is the assimilated daily data from NASA Ocean Biogeochemical Model (NOBM). The NOBM is a comprehensive, interactive ocean biogeochemical model coupled with a circulation and radiative model in the global oceans (Gregg and Casey, 2007). It spans the domain from -84 to 72 degree latitude in increments of 1.25 degree longitude by 2/3 degree latitude, including only open ocean areas where bottom depth > 200m. NOBM contains 4 phytoplankton groups, 4 nutrient groups, a single herbivore group, and 3 detrital pools, and the major ocean carbon components, dissolved organic and inorganic carbon (DOC and DIC).

Version Description

This data is processed in June 2017

Product Summary

Platforms
NOBM
Instruments
NOT APPLICABLE
Spatial Extent

N: 72 S: -84 E: 180 W: -180

Geographic Region
SEA SURFACE
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
1998-01-01 to 2015-12-31
Data Partner
Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/TISL/GESDI
Concept ID
C1404080675-GES_DISC
Data State
COMPLETE
Number of Files/Granules
6574
Processing Level
4
Published
Updated
Science Keywords
PHYTOPLANKTON ,
Nitrate ,
Nutrients ,
Chlorophyll ,
Ocean Color ,
Photosynthetically Active Radiation ,
Ocean Mixed Layer

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Gregg, W., & Rousseaux, C. (2017). NASA Ocean Biogeochemical Model assimilating satellite chlorophyll data global daily VR2017 [Data set]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/PT6TXZKSHBW9 Date Accessed: 2025-12-14

Documents

READ-ME

Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
chl chl mg m-3 float32 -9999 N/A N/A
coc coc mg m-3 float32 -9999 N/A N/A
cya cya mg m-3 float32 -9999 N/A N/A
dia dia mg m-3 float32 -9999 N/A N/A
h h m float32 -9999 N/A N/A
ice ice percent float32 -9999 N/A N/A
irn irn nanomole L-1 float32 -9999 N/A N/A
lat lat degrees_north float32 N/A N/A N/A
lon lon degrees_east float32 N/A N/A N/A
rno rno micromole L-1 float32 -9999 N/A N/A
time time days since 1998-01-01 00:00:00 float32 N/A N/A N/A
tot tot mg m-3 float32 -9999 N/A N/A
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