Indian Monsoon
Indian Monsoon
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quiz Questions
Q51
The core of the heat low-pressure cell that develops over northern India during peak summer is structurally centered over which specific region?
The Malabar Coastal Plain
The Thar Desert and Northwest India
The Coromandel Delta line
The high altitude valleys of Ladakh
Explanation
During May and June, intense solar insolation creates a deep, continuous low-pressure trough stretching from the Thar Desert of Rajasthan to the Chota Nagpur Plateau of Jharkhand.
Q52
The high-velocity 'Tropical Easterly Jet Stream' is structurally driven by the thermal setup of which major geographic feature?
The Western Ghats Escarpment
The Heated Tibetan Plateau
The Deccan Basalt Plateau
The Chota Nagpur Shield
Explanation
The intense heating of the high-altitude Tibetan Plateau during summer creates an upper-tropospheric anticyclone, which acts as the pump for the Tropical Easterly Jet stream flowing south of it.
Q53
Which structural line defines the meeting zone where the Arabian Sea and Bay of Bengal branches of the southwest monsoon converge over central northern India?
The Tropic of Cancer
The Monsoon Trough Axis
The Subtropical Ridge Line
The Malda Fault line
Explanation
The axis of the Monsoon Trough over the Indo-Gangetic plains acts as the zone of convergence where the moisture-laden flows from both marine branches meet.
Q54
Which tracking factor measures the sea surface temperature gradient between the tropical western and eastern Indian Ocean, serving as an index for monsoon health?
Southern Oscillation Index
Indian Ocean Dipole (IOD)
Walker Circulation Margin
Hadley Cell Gradient
Explanation
The Indian Ocean Dipole (IOD) evaluates the difference in sea surface temperatures between the western Indian Ocean (near Africa) and the eastern Indian Ocean (near Indonesia).
Q55
What atmospheric process initializes the retreat of the summer monsoon away from northwest India during early September?
The strengthening of the equatorial counter-current
The southward migration of the sun and weakening of the thermal low
The sudden freezing of the Tibetan Upper Tropospheric core
The emergence of a hot current in the Palk Strait
Explanation
The apparent southward migration of the sun weakens the thermal low-pressure trough over northwest India, leading to a reversal of the pressure gradient and wind direction.
Q56
The core of the low-level cross-equatorial monsoon airflow that intensifies across the Arabian Sea is meteorologically named after which researcher?
Walker Jet
Findlater Jet
Hadley Flow
Halley Stream
Explanation
The low-level cross-equatorial jet stream that steers dense moisture toward India's west coast is famously known as the Findlater Jet (or Somali Jet).
Q57
Which structural atmospheric index evaluates the monthly pressure differences between Tahiti and Darwin to monitor the Southern Oscillation paired with El Niño?
Oceanic Niño Index (ONI)
Southern Oscillation Index (SOI)
Indian Ocean Dipole Index
Madden-Julian Phase Score
Explanation
The Southern Oscillation Index (SOI) tracks pressure variations between Tahiti (Eastern Pacific) and Darwin (Western Pacific/Indian Ocean) to assess monsoon trends.
Q58
What physical parameter drop over the Indian Ocean during El Niño years directly explains the typical reduction in summer monsoon rain?
The land-sea thermal pressure contrast
The rotational speed of the earth over Delhi
The depth of the oceanic trench near Chennai
The localized salinity concentration of Chilika Lake
Explanation
El Niño causes a drop in the land-sea thermal contrast as well as a weakening of the low-pressure anomaly over the Indian subcontinent, suppressing convective cloud development.
Q59
Which of the following describes the behavior of the sub-tropical westerly jet stream across Asia when the summer monsoon sets in over mainland India?
It shifts south to run parallel to the Vindhyas
It shifts completely north of the Tibetan Plateau
It drops down to the surface level over the Thar desert
It breaks into multiple cyclonic eddies in the Bay of Bengal
Explanation
The sub-tropical westerly jet stream shifts completely north of the Tibetan Plateau, clearing the Indian subcontinent to allow the entry of the southwest monsoon flow.
Q60
Which spatial zone in India serves as the primary gateway where the 'Bay of Bengal branch' of the southwest monsoon splits to enter the mainland?
The Gulf of Khambhat coastline
The West Bengal and Bangladesh Delta margin
The Rann of Kachchh salt flat
The Lakshadweep island shelf
Explanation
The Bay of Bengal branch hits the coast of Bangladesh and West Bengal, splitting into one arm that climbs the Northeast Hills and another deflected along the Ganga plains.