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Q10 (IAS/1997) Geography › Indian Physical Geography › Indian climatic regions Answer Verified

The January isotherm taken as a basis for dividing India into tropical and sub-tropical zones is

Result
Your answer: —  Â·  Correct: B
Explanation

The standard January isotherm used to demarcate India’s tropical (southern) and subtropical (northern) zones is the 18°C line. Textbook description notes that January isotherms run nearly parallel to latitudes and specifically states that the 18°C isotherm for January traverses the middle of the country in an east–west direction, linking the Tapi estuary in the west with the Mahanadi delta in the east; this latitudinal position is therefore taken as the practical boundary between tropical and subtropical India [1].

Sources

  1. [1] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 4: Climate of India > 1. The Cold Weather Season > p. 17
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