Which of the following are the major factors responsible for the monsoon type of climate in India? 1. Location 2. Thermal contrast 3. Upper air circulation 4. The Himalayan Mountains Select the correct answer using the code given below.

The monsoon type of climate in India is influenced by several interconnected factors. Location is fundamental, as India's tropical belt position and latitudinal extent determine the initial climatic character. Thermal contrast, specifically the differential heating and cooling of the vast Asian landmass compared to the Indian Ocean, creates the pressure gradients necessary for seasonal wind reversal [4]. Upper air circulation, including the movement of westerly and easterly jet streams and the role of the Tibetan Plateau as a high-level heat source, significantly impacts the monsoon's onset and intensity [3]. Finally, the Himalayan Mountains act as a critical physical barrier, blocking cold northern air and forcing moisture-laden monsoon winds to rise and cause precipitation across the subcontinent [2]. Together, these factors create the unique monsoonal rhythm observed in India.

Sources

1. [2] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 4: Climate of India > JET STREAM AND INDIAN MONSOON > p. 8
2. [4] https://ncert.nic.in/textbook/pdf/kegy104.pdf
3. [3] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 4: Climate of India > The Thermal Concept of Halley > p. 1