Indian Monsoon
Indian Monsoon
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quiz Questions
Q31
Which mechanism initializes the physical 'Onset' of the Southwest Monsoon over the south-western coast of India?
The strengthening of the Siberian high pressure system
The northward shift of the ITCZ and arrival of moisture-laden cross-equatorial winds
The southward movement of the Subtropical Westerly Jet below Delhi
The cooling down of the core landmass of Central India
Explanation
The northward shift of the ITCZ and the establishment of the low-level Somali Jet Stream carry dense marine moisture, causing the monsoon burst over Kerala.
Q32
The multi-week dry spell observed within the active phase of the southwest monsoon is structurally linked to which atmospheric event?
The strengthening of the Tropical Easterly Jet
The northward shift of the monsoon trough axis
The lowering of sea surface temperatures in the Arabian Sea
The formation of a deep low-pressure center over Mumbai
Explanation
A monsoon break occurs over the plains when the low-pressure monsoon trough shifts northwards toward the foothills of the Himalayas, leaving Central India dry.
Q33
Which mountain system acts as an effective geographical guide to channel the Bay of Bengal branch of the southwest monsoon deep into the Indo-Gangetic Plains?
The Aravalli Range
The Himalayas
The Satpura Range
The Western Ghats
Explanation
The Himalayan range blocks the northward movement of the Bay of Bengal monsoon branch, deflecting these moisture-laden winds westwards along the Indo-Gangetic Plains.
Q34
Which of the following regional index variations describes the 'negative phase' of the Indian Ocean Dipole (IOD)?
Warmer waters in the western Indian Ocean near Madagascar
Warmer waters in the eastern Indian Ocean near Sumatra and Indonesia
Complete drying of the equatorial surface currents
The appearance of freezing ice sheets across the Persian Gulf
Explanation
A negative IOD is characterized by warmer sea surface temperatures in the eastern Indian Ocean near Indonesia and cooler temperatures in the western Indian Ocean, which often dampens the Indian monsoon.
Q35
Which mechanism initializes the physical 'Onset' of the Southwest Monsoon over the south-western coast of India?
The strengthening of the Siberian high pressure system
The northward shift of the ITCZ and arrival of moisture-laden cross-equatorial winds
The southward movement of the Subtropical Westerly Jet below Delhi
The cooling down of the core landmass of Central India
Explanation
The northward shift of the ITCZ and the establishment of the low-level Somali Jet Stream carry dense marine moisture, causing the monsoon burst over Kerala.
Q36
The core line of the Inter-Tropical Convergence Zone (ITCZ) during the winter season shifts completely away from India and settles over which general region?
The Tibetan Plateau
The Southern Indian Ocean
The Mediterranean Sea
The Tropic of Cancer
Explanation
During winter, the sun migrates southwards, causing the ITCZ to shift into the Southern Hemisphere over the southern Indian Ocean, which establishes northeast trade winds over India.
Q37
What is the primary thermodynamic reason why air masses warming up over the Thar Desert do not cause significant rainfall during the summer monsoon?
The absolute absence of dust particles in the desert sky
Atmospheric subsidence and upper-level dry air inversion
Freezing geothermal pressure cells near the surface
The immediate freezing of condensation nuclei
Explanation
The upper atmospheric anti-cyclonic circulation and subsidence of dry air masses over Rajasthan, combined with lack of mountain barriers, create an inversion layer that suppresses cloud formation.
Q38
The tracking factor known as 'Madden-Julian Oscillation' (MJO) affects the Indian monsoon by operating through which mechanism?
A stationary polar air mass blocking winter winds
An eastward-travelling equatorial wave of convective cloudiness and rainfall
A sudden geothermal heating inside the Arabian Sea basin
A high-velocity dust storm track moving from the Sahara
Explanation
The MJO is an eastward moving convective cloud band along the equator that periodically enhances or suppresses rainfall over the Indian Ocean depending on its phase.
Q39
Which of the following states in India is typically the last to see the complete withdrawal of the Southwest Monsoon?
Rajasthan
Punjab
Tamil Nadu
Gujarat
Explanation
The Southwest Monsoon withdraws first from northwest India in September and moves southwards, completely leaving the southern peninsula (specifically Tamil Nadu/Kerala margins) last by early window of October/November.
Q40
The core line of the Inter-Tropical Convergence Zone (ITCZ) during the winter season shifts completely away from India and settles over which general region?
The Tibetan Plateau
The Southern Indian Ocean
The Mediterranean Sea
The Tropic of Cancer
Explanation
During winter, the sun migrates southwards, causing the ITCZ to shift into the Southern Hemisphere over the southern Indian Ocean, which establishes northeast trade winds over India.