Satellite data are grouped
by region and by year. Currently there are two types of measurements: SST and surface Chl-a concentration. Under each year these data are composited over
different time intervals: day, 5-day, 15-day, month.
If possible, similar data
from multiple sensors are merged in order to increase coverage (reduce missing
data due to clouds).
The files are identified by
sensor or variable and compositing interval. The first letter of the file
identifies the sensor/variable and is the following:
The full-resolution (1-km)
datasets with numerical values are in HDF. Reduced and annotated datasets are
in both HDF and PNG. Attributes within HDF files provide information about the
data. HDF files can be read with a number of programs.
Net Primary Production
(NPP) is currently presented only for the
The inputs are monthly
means of Chl-a, PAR and SST. Units are mg C/m^2/day. Options are: photoinhibition present, PbOpt
temperature model of Behrenfeld-Falkowski (1997), euphotic zone depth model of
Morel and Berthon (1989). More details are in Kahru, M., B.G. Mitchell,
Influence of the El Niño – La Niña cycle on satellite-derived primary
production in the
Both HDF and PNG images are
given. PAR data are from SeaWiFS. SST data are from AVHRR-Pathfinder and
MODIS-Aqua (from 07/2002 to present), Chl-a data are from SeaWiFS (09/1997 to
06/2002) and from merged SeaWiFS-MODIS-Aqua (07/2002 to present). NPP filenames
using SeaWiFS Chl-a data start with S and those using merged Chl-a data start
with A.
For more information please
send email to mkahru-AT-ucsd.edu (replace -AT- with @).