Mentally draw a horizontal straight line between the middle marks on the right and left borders of the map to represent the equator. The marks along the right and left borders of the map are drawn at a 10-degree interval to position latitudes in the Northern and Southern Hemispheres. According to the figure the expansive regions of the ocean colored red where the value of evaporation exceeds precipitation by 4 mm/day or more are centered at about [(0)(15 to 25)(30 to 40)] degrees N and S. Stated another way these ocean regions annually lose more than 140 cm (1.4 m!) of water by evaporation than they gain via precipitat
