Photosynthesis:
The National Aeronautics and Space Administration produces
satellite-derived estimates of photosynthesis over land and sea.
Photosynthetically-active regions are shaded green to red for the
oceans and green to blue for land. The color scales are linked here as a
GIF image | JPEG
image. These images are called SeaWiFS for "sea-viewing wide field-of-view
sensor." NASA provides a teacher's
resource WWW page this data. Images can be obtained for other seasons and variables from the SeaWiFS home
page. These maps are "SeaWiFS CHL_BIOS."
September-October-November (SON) 1997 average
PostScript | JPEG for Asia | Global PNG
The global and Asia images
are somewhat different. The data has been recalibrated from time to time
as new data has come in, and the global maps are the more recent analyses.
Look at how the photosynthesis changes from one
year to the next.
December-January-February (DJF) 1997-98 average
PostScript | JPEG for Asia | Global PNG
March-April-May (MAM) 1998 average
PostScript | JPEG for Asia | Global PNG
June-July-August (JJA) 1998 average
PostScript | JPEG for Asia | Global PNG
Topography maps
The PostScript file for these maps and for the photosynthesis plots produce
plots of the same size.
Contours for 1.5 and 4 km elevations
PostScript | JPEG
Shading for land, elevations > 1.5 km, and elevations > 4 km.
PostScript | JPEG
