 Thus, under this system, many "Csb" zones in the Köppen system become "Do" (temperate oceanic), and the rare "Csc" zones become "Eo" (subpolar oceanic), with only the classic dry-summer to warm winter, low annual rainfall locations included in the Mediterranean type climate.Under Holdridge life zones classification, the Mediterranean climates are either temperate or subtropical climates.They are frequently found within the Warm Temperate region as defined by Leslie Holdridge with a mean annual biotemperature between 12°C and the frost line or critical temperature line, 16°C to 18°C (depending on locations in the world but often "simplified" as 17°C (= 2(log212+0;5) ≈ 16.97°C)).