# Decrease in temperatures of the ocean and the atmosphere and approach of big Ice Age in the conditions of establishment of cycles of Milankovich

**DOI: 10.21047/1606-4313-2017-16-3-62-66**

**UDC 536.2/.332/.483; 551.511.13**

## Decrease in temperatures of the ocean and the atmosphere and approach of big Ice Age in the conditions of establishment of cycles of Milankovich

**Abdussamatov H. I., Lapovok Yevgeniy V., Khankov S.I.**

**For citation:**Abdussamatov H.I., Lapovok Ye.V., Khankov S.I. Decrease in temperatures of the ocean and the atmosphere and approach of big Ice Age in the conditions of establishment of cycles of Milankovich. Vestnik Mezhdunarodnoi akademii kholoda. 2017. No 3. p. 62-66

**Abstract**

The mathematical model describing dependences on time of the movement of Earth on an elliptic trajectory around the Sun of temperatures of the ocean and the atmosphere is developed. Researches were conducted for two values of eccentricity of an orbit of Earth. One value corresponds realized nowadays. The second is accepted equal to the greatest possible value of eccentricity which according to Milankovich's theory corresponds to a deep climatic minimum. With a depth of an active layer of the ocean of 700 m area density of a full thermal capacity of the ocean by 300 times exceeds area density of a full thermal capacity of the atmosphere. However owing to the intensive thermal communication of the ocean and the atmosphere which is most caused convective and vaporizing component values of coefficient of a thermolysis, size of thermal inertia of the atmosphere and the ocean are close and dynamics of change of their temperatures is similar to change of planetary temperature. Regardless of the size of eccentricity of an orbit of Earth, transition from an initial equilibrium state to the established oscillatory state at the movement on an elliptic orbit makes about 200 years. On condition of constancy of albedo of the Bond of Earth decrease in temperatures of the ocean and the atmosphere makes about 1.5 K to an increase in eccentricity of an orbit from 0.0167 to 0.0658. Essential decrease in these temperatures is possible only due to increase in albedo of the Bond owing to increase in the area of ice and snow cover on the Earth's surface. Annual fluctuations of temperatures of the ocean and the atmosphere make respectively 0.02 K and 0.1 K to at present value of eccentricity and 0.1 K and 0.4 K at the maximum increase in eccentricity of an orbit.

**Keywords:**Milankovich's cycles, average temperature of the ocean, average temperature of the atmosphere, elliptic orbit, solar constant, Bond albedo.

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