GMAO OCEAN BIOLOGY AND BIOGEOCHEMICAL MODELING, DATA

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Phytogroups: the database of published phytoplankton group relative abundance. This database was build in order to validate the NOBM (e.g. Gregg and Casey, 2007).

 

Ocean Atmosphere Spectral Irradiance Model (OASIM): Radiative transfer calculations provide the underwater irradiance fields necessary to drive growth of the phytoplankton groups, and interact with the heat budget. The Ocean Atmosphere Spectral Irradiance Model contains a treatment of the spectral and directional properties of radiatve transfer in the oceans, and explicitly accounts for clouds. The atmospheric radiative model covers the spectral regions 200 nm to 4 μm, and is fully described in Gregg and Casey (2009) and Gregg (2002).

Atmospheric optical data for OASIM: The different columns are: (1, First column) is lambda (wavelength, nm), (2) Extraterrestrial irradiance (W/m2), (3) Rayleigh optical thickness (dimensionless), (4) Ozone absorption coefficient (cm-1), (5) Water vapor absorption coefficient (cm-1), (6) Oxygen absorption coefficient (cm-1), and (7) Carbon dioxide absorption coefficient (cm-1).

There are three output products from the atmospheric portion of OASIM available to the public on this website. Each spans the time period 1979-2011, and each is global at one-degree spatial resolution.

1) Monthly mean spectral downwelling irradiance in 33 increments, containing direct and diffuse components. The data are provided as the mean of 2-hourly increments to resolve diurnal variability. Units: W m-1 (variable) nm-1.

2) Monthly mean spectral downwelling irradiance in 33 increments, containing direct and diffuse components, not diurnally-resolved. Units: W m-1 (variable) nm-1.

3) Monthly mean Photosynthetic Active Radiation (PAR). Units mol photons m-2 d-1