Biogeochemical Impacts of Dust on the Global Carbon Cycle - Mineral Dust: A Key Player in the Earth System - page 366

Fig. 14.5 ( a ) Satellite-derived map of average surface water chlorophyll distribution (NASA).
This data visualisation comes from the MODIS instrument on NASA's AQUA spacecraft. Here
we see a measure of global chlorophyll concentration derived from data collected between July 1,
2002 and December 31, 2004. This visualisation has a 4-km measure of resolution. (Credit:
NASA. http://www.nasa.gov/vision/earth/lookingatearth/plankton.html ) . ( b ) Map of surface ocean
nitrate concentrations from the Levitus atlas (NOAA) http://www.nodc.noaa.gov/OC5/WOA09F/
pr_woa09f.html . All data are made available internationally without restriction consistent with the
data policy of World Data System