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. Through links on the
SeaWiFS home page you can make pictures for this and other regions of
the globe, and for other seasons and variables.
December-January-February (DJF) 1997-98 average
PostScript | JPEG for Asia | JPEG
for world
March-April-May (MAM) 1998 average
PostScript | JPEG for Asia | JPEG
for world
June-July-August (JJA) 1998 average
PostScript | JPEG for Asia | JPEG
for world
Topography maps
Contours for 1.5 and 4 km elevations
PostScript | JPEG
Shading for land, elevations > 1.5 km, and elevations > 4 km.
PostScript | JPEG
