IAS (Admin.) Mains Geography Physical Setting- India-Mechanism of Indian Monsoons and Rainfall Patterns Study Material (Page 2 of 21)

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Classical Theories of Indian Monsoon: Developing the Dynamic Concept of ITCZ (Inter-Tropical Convergence Zone) or Air Mass Theory

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Developing the Dynamic Concept of ITCZ (Inter-Tropical Convergence Zone) or Air Mass Theory

According to Riehl (1954) , tropical monsoon constitutes a perturbation of the Trade Wind circulation that converges into the ITCZ. Therefore, the seasonal movement of the ITCZ identifies the leading edge of the monsoon over a region at any time of the year.

Monsoon regions of the world

Illustration 1 for Developing the Dynamic Concept of ITCZ (Inter-Tropical Convergence Zone) or Air Mass Theory

The region swept out by the ITCZ in the course …

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Classical Theories of Indian Monsoon: Difference between Halley՚s and ITCZ Concepts, Flohn՚s Theory (1958)

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Difference between Halley՚s and ITCZ Concepts

  • While the Halley՚s associates the monsoon with a system special to the monsoonal region, the ITCZ concept postulates that monsoonal regions differ only in the amplitude of the seasonal migration of the basic ITCZ or equatorial trough system.
  • The two hypotheses have very different implications for variability of the monsoon. For example, in the first case, we expect the …

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