Ocean Productivity (NPP)

This product is developed at the Oregon State University, its home page is here:

http://www.science.oregonstate.edu/ocean.productivity/index.php

It provides monthly or weekly Net Primary Production global maps with a resolution of 1/6degree or 1/12 (!) from 1997-2007 (using SeaWIFS chlorophyll) and 2002-2007 (using MODIS chlorophyll).

It is based on a misc of datas (chlorophyll, SST, radiative forcing) and a model (Vertically Generalized Production Model, VGPM, Behrenfeld & Falkowski 1997a). It's all well explained on their website.

After downloading the monthly Standard SeaWIFS based estimate (here: http://orca.science.oregonstate.edu/1080.by.2160.monthly.hdf.vgpm.s.chl.a.sst.php) in hdf format, I converted it in netcdf using the matlab function hdf2netcdf.m you'll find at the bottom of this page and then blended the whole monthly time serie into a single netcdf file using another matlab script (again attached to this page). The single netcdf file is 1.1 Go size.

Download:

• 1997-2007 SeaWIFS based monthly Standard estimate of NPP (gzip netcdf file, 510Mb)

Reference:

Photosynthetic Rates Derived from Satellite-Based Chlorophyll Concentration

Michael J. Behrenfeld, Paul G. Falkowski

Limnology and Oceanography, Vol. 42, No. 1 (Jan., 1997), pp. 1-20: http://www.jstor.org/stable/2838857

Mean NPP 1998-2007, zoom North Atlantic

Annual NPP anomaly (green) integrated over the Irminger Sea versus NAO winter index (blue)

Mean NPP 1998-2007