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Western Disturbance - Climate Change (in Tamil)
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The Climate of India comprises a wide range of weather conditions across a vast geographic scale and varied topography, making generalisations difficult. Based on the Koppen system, India hosts six major climatic subtypes, ranging from arid desert in the west, alpine tundra and glaciers in the north, and humid tropical regions supporting rainforests in the southwest and the island territories. The country's meteorological department follows the international standard of four climatological seasons with some local adjustments: winter (December, January and February), summer (March, April and May), a monsoon rainy season (June to September), and a post-monsoon period (October to November). Here in this course I am going explain Western Disturbance

Karthick Selvaraj
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  1. GEOGRAPHY CLIMATE CHANGE WESTERN DISTURBANCE


  2. A Western Disturbance is an extra tropical storm originating in the Mediterranean region that brings sudden winter rain to the northwestern parts of the Indian subcontinent he moisture in these storms usually originates over the Mediterranean Sea and the Atlantic Ocean Western Disturbances are important for the development of the Rabi crop, which includes the locally important staple wheat


  3. It is an Extra tropical Strom Originating in the Mediterranean Sea & Spell of fine Weather over North Western and Northern India by means of Jet stream Traveling at speeds up to 12 m/s (43 km/h; 27 mph), the disturbance moves towards the Indian subcontinent until the Himalayas inhibits its development, upon which the depression rapidly weakens Its strikes India in between December to February



  4. Western disturbances, specifically the ones in winter, bring moderate to heavy rain in low-lying areas and heavy snow to mountainous areas of the Indian Subcontinent >They are the cause of most winter and pre- monsoon season rainfall across northwest India Precipitation during the winter season has great importance in agriculture, particularly for the rabi crops


  5. An average of four to five western disturbances form during the winter season The rainfall distribution and amount varies with every western disturbance Western disturbances are usually associated with cloudy sky, higher night temperatures and unusual rain Excessive precipitation due to western disturbances can cause crop damage, landslides, floods and avalanches


  6. They Intensity over Rajasthan, Punjab & Haryana The strongest western disturbances usually occur in the northern parts of Pakistan, where flooding is reported number of times during the winter season The interaction of the monsoon trough with western disturbances may occasionally cause dense clouding and heavy precipitation The 2013 North India floods, which killed more than 5000 people in a span of 3 days, is said to be a result of one such interaction