Physical Geography Western Disturbances Context: Following the weakening and eastward movement of a recent Western Disturbance, Northwest India is currently experiencing a brief, temporary respite from rain and thunderstorms. About Western Disturbances These are extra-tropical storm systems that originate in the Mediterranean Sea and travel eastward towards the Indian subcontinent. They bring moisture-laden winds and interact with the subtropical jet stream. Consequently, weather conditions across vast regions including parts of Pakistan, India, Nepal, and Bangladesh are affected. Western Disturbances primarily impact India during the winter months, spanning from November to March. They bring rainfall and snowfall that are vital for the Rabi crop season, particularly across Northwest India, including Punjab, Haryana, and Delhi. Origin and Naming of Western Disturbances Western Disturbances are named as such due to their origin and movement patterns. These weather systems originate in the western parts of the globe, specifically within the Mediterranean region. When they form in the Mediterranean Sea and its adjoining areas, they are referred to as Western Disturbances. The term "Disturbance" refers to the disruptive nature these weather systems exhibit as they travel eastward from their point of origin towards the Indian subcontinent and beyond. While these phenomena are known as Western Disturbances in India, similar weather events in other parts of the world may be referred to by different names, depending on their specific origins and impacts. The Teesta River Context: Recently, the Government of Bangladesh sought China's "involvement and support" for the Teesta River restoration project. About Teesta River It originates from Lake 'Tso Lhamo,' situated in the North Sikkim region of India at an elevation of approximately 5,280 meters. It is a glacier-fed river; the 'Pahurni' and 'Khangse' glaciers, along with Lake 'Tso Lhamo,' serve as the primary water sources for its flow. It is a major tributary…
