4. From where the western cyclonic disturbance originate in winter?
Answers
Answer:
A western disturbance is an extratropical storm originating in the Mediterranean region that brings sudden winter rain to the northwestern parts of the Indian subcontinent. It is a non-monsoonal precipitation pattern driven by the westerlies.
Answer:
Western Disturbance is an extratropical storm, which give rain to North and Northwest India during winter. It is very useful for wheat and winter crops. It is driven by westerlies (westerlies, are prevailing winds from the west toward the east in the middle latitudes between 30 and 60 degrees latitude.)
Western Disturbances originate from the Mediterranean sea, the Black sea, and the Caspian sea. From this region and from Atlantic ocean they collect the moisture and move eastward.
In the extratropical zone frontogenesis (a process in which two air masses of different densities come together to form a front) process take place which in turn facilitates the formation of the cyclone. These types of cyclones occurring over mid-latitude are called extratropical cyclones. They travel as a family and reaching north India one by one. They are more in frequency in the winter season as westerlies are stronger in winter. They approach India by traveling across Iraq, Iran, Afghanistan, and Pakistan. They are mainly lower tropospheric systems that show variation in strength and vertical extent with superimposition of a mid and upper tropospheric trough in westerlies.