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. 1998 Nov 24;95(24):14009–14014. doi: 10.1073/pnas.95.24.14009

Table 2.

Population, land area, and population density in each combination of latitudinal and elevational zones, and marginal distributions

S temperate S tropical N tropical N temperate All latitudes
Population, 109
 ≤500 m elevation 0.0853 0.2943 1.0684 2.6921 4.1400
 >500 m, ≤1500 m 0.0463 0.1591 0.2728 0.6098 1.0881
 >1500 m 0.0123 0.0627 0.1364 0.1780 0.3894
 All elevations 0.1439 0.5161 1.4777 3.4799 5.6175
Area, km2
 ≤500 m elevation 6,966,040 14,025,518 16,463,223 38,256,874 75,711,655
 >500 m, ≤1500 m 3,500,417 8,283,784 7,463,315 24,709,168 43,956,684
 >1500 m 605,930 1,819,037 1,792,296 8,360,332 12,577,595
 All elevations 11,072,387 24,128,339 25,718,834 71,326,374 132,245,934
Density, people/km2
 ≤500 m elevation 12.2451 20.9832 64.8962 70.3691 54.6811
 >500 m, ≤1500 m 13.2270 19.2062 36.5521 24.6791 24.7539
 >1500 m 20.2994 34.4688 76.1035 21.2910 30.9598
 All elevations 12.9963 21.3898 57.4559 48.7884 42.4777

Example: 1.07 × 109 people live on 16.5 × 106 km2 of land at elevations ≤500 m in N tropical latitudes, with an average population density of 65 people/km2