At which of the following latitudes, Inter Tropical Convergence Zone (ITCZ) is found during summer (July)?

Appeared in: DSSSB 6 September 2024

Explanation

The Inter-Tropical Convergence Zone (ITCZ) is a dynamic low-pressure belt that follows the sun's apparent seasonal movement.
During the Northern Hemisphere's summer in July, the sun's most direct rays are over the Tropic of Cancer (23.5° N).
This intense solar heating causes the ITCZ to migrate north from the equator to a position near the Tropic of Cancer.
This northward shift is a critical factor in driving monsoon weather patterns in regions like South Asia.

Option A: The ITCZ is located near the Tropic of Capricorn during the Southern Hemisphere's summer (which corresponds to the Northern Hemisphere's winter, around January).
Option C: While the ITCZ's average annual position is near the equator, it migrates significantly with the seasons. In July, it is well north of the equator.
Option D: The Arctic Circle is located at 66.5° North, far outside the tropical and subtropical zones where the ITCZ operates.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Seasonal migration of the Inter-Tropical Convergence Zone (ITCZ) as background academic context rather than a clinical decision trigger.
The movement of the ITCZ is a key driver of monsoon seasons, which significantly impacts public health by influencing the prevalence of water-borne (e.g., cholera, typhoid) and vector-borne diseases (e.g., malaria, dengue).
For community health nurses, understanding these large-scale weather patterns is crucial for anticipating disease outbreaks, planning health camps, and advising on preventive measures in tropical regions.
What if? If the question asked for the ITCZ's location during an equinox (March or September), the correct answer would be the Equator, as the sun would be directly overhead at 0° latitude.

How to Approach the Question

Identify the core concepts in the question: 'Inter Tropical Convergence Zone (ITCZ)' and the specific time, 'summer (July)'.
Recall the fundamental principle of the ITCZ: it is a zone of low pressure that follows the area of the Earth receiving the most direct sunlight (the thermal equator).
Relate the time of year to the sun's position. 'Summer (July)' in the Northern Hemisphere means the sun is at its northernmost point in the sky.
Identify the latitude corresponding to the sun's northernmost position: the Tropic of Cancer (23.5° N).
Conclude that the ITCZ must also shift north towards the Tropic of Cancer during this time.
Select the option that matches this conclusion.

Concept Tested & Keywords

Concept Tested: Seasonal migration of the Inter-Tropical Convergence Zone (ITCZ)
Stem keywords: Inter Tropical Convergence Zone, ITCZ, latitudes, summer, July
Lead-in keywords: At which

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Practise the full DSSSB 6 September 2024

Attempt every question from this paper in a timed mock, then review the full solution for each one.