Milankovitch cycles refer to Milankovitch cycles refer to changes in Earth-Sun r
ID: 297423 • Letter: M
Question
Milankovitch cycles refer to
Milankovitch cycles refer to
changes in Earth-Sun relationships, namely Earth's orbit around the sun, axial rotation, and axial tilt. topographic changes from orogeny, erosion, and mass movement. cyclical changes in solar irradiance caused by increases and decreases in sunspot activity. increases and decreases in atmospheric gases and aerosols, primarily caused by natural activity, such as volcanic eruptions and changes in net primary productivity. tectonic changes in continental positionsExplanation / Answer
Milankovitch cycles refer to the periodic changes in the orbital parameters of the Earth such as obliquity, precession, and eccentricity. Obliquity changes take place in the form of a shift in earth's axial tilt once in every 41,000 years. Precessional changes occur once in every 23,000 years due to the wobbling of earth's rotational axis. Changes in eccentricity happen due to a shift in the movement of the earth around the Sun once in every 100,000 years.
Topographic changes from orogeny, erosion and mass movement belong to the orogenic cycle.
Cyclical changes in solar irradiance caused by increases and decreases in sunspot activity are known as solar cycles.
Increases and decreases in atmospheric gases and aerosols, primarily caused by natural activity such as volcanic eruptions and changes in net primary productivity are an integral part of biogeochemical cycles.
Tectonic changes in continental positions are defined by the Wilson cycle consisting of processes such as plate convergence and divergence.
Thus, the correct option is - changes in Earth-Sun relationships, namely Earth's orbit around the Sun, axial rotation, and axial tilt.