Fig. 4.2-2

Calculatd values of orbital parameters of the earth which are relevant to insolation. Values are given based on studies by Berger (1977), (1978).

For the recent past 400 thousand years and future 100 thousand years. The unit of the horizontal axis is thousand years. Negative values on the axis refers to the past, positive to the future.

• Top: eccentricity e.
• Middle: factor of the season of perihelion, e sin , where is the longitude of periherion.
• Bottom: obliquity (in degrees).

Updated 2011-01-29