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meri saheli magazine subscription  Published this article page no  43 Why is it called a bomb? Most cyclones dont intensify rapidly in this way. Bomb cyclones put forecasters on high alert because they can produce significant harmful impacts. Things you should know about a bomb cycloneOccurs over midlatitudes.Have cold air and fronts.Form during winter. What exactly is a polar vortex? It is described as a whirling cone of low pressure over the poles that is strongest in the winter months due to the increased temperature contrast between the polar regions and the midlatitudes such as the US and Europe.  20 FeaturesThe polar vortex spins in the stratosphere.Usually it forms a wall that protects the midlatitudes from cold Arctic air.When the vortex weakens the stratosphere warms sharply in an event known as sudden stratospheric warming in just a few days miles above the Earths surface.The warming weakens the polar vortex shifting its location somewhat south of the pole or in some instances splitting the vortex up into sister vortices.  What are Karewas? Context In the name of development Kashmirs highly fertile alluvial soil deposits called karewas are being destroyed.Despite its agricultural and archaeological importance karewas are now being excavated to be used in construction. What are Karewas? In the Kashmiri dialect the term Karewa means elevated table land.Firstly this term was used by Godwin Austin in 1859 and later on by Lydekker in 1878 for unconsolidated to semiconsolidated sand clay conglomerate sequence.Vudr is the local name for Karewas in Kashmiri language. Karewas are the thick deposits of glacial clay and other materials embedded with moraines. These are unconsolidated lacustrine deposits. Lacustrine means associated with lakes. How were they formed in Kashmir valley?Kashmir valley resides between the Great Himalayas and the Pir Panjal ranges of the Kashmir Himalayas. In earlier times when the upliftment of the Pir Panjal ranges happened the flow of the river had stopped.As a result the whole of Kashmir valley became a large lake. Slowly the glacial deposits have accumulated here in this lake. Thus creating a large lacustrine plain.Later on the water drained away and these unconsolidated deposits remained there. These unconsolidated gravel and mud deposits are known as Karewa formation. Economic significance of Karewas  Karewa deposits have different soil and sediments such as sand clay silt shale mud lignite and losses. Hence these are very useful for agricultural and horticulture activities.Karewa formations are useful for the cultivation of Zafran. Zafran is a local variety of Saffron in Kashmir valley. These are also important for the cultivation of almond walnut apple and orchards meri saheli magazine subscription buy.

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