The question asks to identify the four main seasons recognized by the Indian Meteorological Department (IMD). This requires knowledge of India's distinct seasonal calendar, which is primarily driven by monsoon patterns.
D) Winter (Dec-Feb), Summer/Pre-monsoon (Mar-May), Southwest Monsoon (Jun-Sep), and Retreating/Northeast Monsoon (Oct-Nov) — This option correctly lists the four main seasons as recognized by the Indian Meteorological Department, along with their typical months. These seasons are distinct and define the climate patterns across India.
The question asks to identify the local wind characteristic of the Indian summer (pre-monsoon) season in the plains of North India, described as hot, dry, and dusty. We need to recall the common local weather phenomena in India during this period and match the description to the correct term.
D) Loo — The Loo is indeed a strong, hot, dry, and dusty wind that blows across the plains of North India during the pre-monsoon summer months (April to June). It is known for its high temperatures and dry nature, often causing heatwaves and heatstroke.
The question asks to identify the popular name for pre-monsoon showers in Kerala and coastal Karnataka, which are beneficial for specific crops like coffee, cashew, and mango. This is a factual question related to regional climatic phenomena in India.
C) Mango showers are the pre-monsoon showers that occur in Kerala and coastal Karnataka. These showers are crucial for the early ripening of mangoes, and they are also beneficial for coffee and cashew cultivation in these regions. They typically occur in April and May.
The question asks to identify the local name for pre-monsoon thunderstorms in West Bengal and Assam, characterized by severe squalls and destructive winds. This requires knowledge of regional climatology and local terminology for weather phenomena in India.
Correct Option: C) Kalbaisakhi (or 'Nor'westers') refers to the pre-monsoon local thunderstorms common in West Bengal and Assam during the summer season. These are often associated with severe squalls and are known to bring sudden destructive winds and heavy rainfall, sometimes with hail.
The question asks for the primary cause of 'Aandhi' dust storms in northwestern India during summer. We need to identify the meteorological phenomenon most directly responsible for these events.
C) Intense surface heating creating strong convective currents that lift loose, dry topsoil — This is the primary mechanism. The extreme heat in summer over the dry plains of northwestern India causes the ground to heat up rapidly. This leads to the formation of strong thermal updrafts (convective currents) that lift the loose, dry soil particles high into the atmosphere, resulting in dust storms.
The question asks to identify the correct definition of 'Western Disturbances' in the context of India's winter season. This requires knowledge of Indian climatology and the various weather phenomena affecting the subcontinent.