316 Appendix
A2 Topographic Statistics
Earth
Equatorial radius = 6378 km
Polar radius = 6356 km
Area = 510 x 10 6 km 2
Volume = 1.083 x 1012 km 3
Northern hemisphere: 61 % oceans
Southern hemisphere: 81 % oceans
Sea floor = 71 % of Earth's surface
Oceans
Atlantic Ocean (inc!. Arctic and marginal seas)
Area = 107 million km 2
Volume = 351 million km 3
Indian Ocean
Area = 74 million km 2
volume = 285 million km 3
Pacific Ocean
Area = 181 million km 2
Volume = 714 million km 3
Total ocean
Area = 362 million km 2
Volume = 1347 million km 3
Depths: for depths see Table 2.2
Source for A2, H. U. Sverdrup et al. (1942) the oceans, Prentice Hall, Engle wood Cliffs, New Jersey.
Shel ves: for shelf areas see Table 2.1