Fig 1.
Annual mean land temperature in 10°C contour intervals (hue), and population density separated by Dj = 1, 10, 100, 1000 people/km2 (shade), mapped in separate equal-area (sinusoidal) projections for the Americas, western Eurasia/Africa, and eastern Asia/eastern Pacific.
Fig 2.
Rectangles representing population distributions in the year (A) 2000 CE and (B) 1800 CE.
Each rectangle represents a 2°C temperature range. The width, height, and area of each rectangle give Ai, Di, and Pi, respectively, of the ith temperature range. Rectangles are arranged from left to right in order of ascending temperature limits, and values of area marked on horizontal axis are cumulative. Bars below each chart represent population share of each temperature range.
Fig 3.
(A) Area of Earth’s surface (excluding Antarctica and Greenland) within given temperature and population density ranges. Colors correspond to those in same T-D range in Fig 1. Numbers represent population in millions within each area (below stack for small-area rectangles at bottom of stack). (B) As in Fig 2, but with each rectangle representing regions within a given range of temperature and precipitation. Hue of each represents temperatures as in Fig 1, but shade represents precipitation ranges. Each row of rectangles represents a given temperature interval, arranged in order of ascending precipitation categories; characteristics of regions represented by a given rectangle are independent of the rectangle’s location.
Fig 4.
Like Fig 2 but with each rectangle representing a range of annual average precipitation R for the year 2000 CE.
Precipitation ranges are 10 cm/year for R < 80 cm/year, 20 cm/year for 80 ≤ R < 160, 40 cm/year for 160 ≤ R < 320, and 160 cm/yr for 320 ≤ R < 960.