50. Which is NOT a major component of Milankovich cycles? a. Precession of the E

Question

50. Which is NOT a major component of Milankovich cycles? a. Precession of the Earth b. Obliquity of the Earth c. Eccentricity of the Earth's orbit d. Changes in tidal forcing over the year 51. Which does NOT contribute to variability in the solar radiation reaching the Earth? a. The Earth's angle of inclination b. The eccentricity of Earth's orbit c. The amount of ice on the Earth d. Variability in solar radiation due to sun spots e. Changes in the direction of the Earth's axis of rotatiorn 52. Which contributes LEAST to relative sea level rise? Melting of Arctic ice Melting of Antarctic ice a. c. Therma exhamsion of weater sit wams d. Land subsidence e. Groundwater extraction

Explanation / Answer

50)

Ans-d

Explanation- Milankovich cycles are all about the

A) Eccentricity - Change in the shape of orbits from elliptical to circular.

B) Obliquity - Wobling of the axis of rotation

C) Precession- Change in the angle of tilt.

However the Milankovich cycles having periods of over 10000 years does not include tidal patterns.

51)

Ans- c

Explanation- The ice only regulates the Earth's energy budget. It increases the planetary albedo. But the incoming radiations are unaffected.

52)

Ans-a

Explanation- Arctic ice are sea ice. Floating ice over water when melts, does not cause rise in water level.

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