The winds blow inwards in anti-clockwise direction in the Northern Hemisphere. A cycloneis a portion of the atmosphere in which the pressure islowest in the centre. Thisphenomenon is to be found in south-east Asia, but isespecially marked in the subcontinent of India. The monsoon or seasonal winds maybe regarded as land and sea breezes on a large scale, inwhich the time-frame is a year instead of a day. Thus at night, heavycool air blows from the land to take the place of warm airrising over the sea. During the daythe land becomes very much hotter than the sea, with theresult that there is marked low pressure over the land.Thus the air over the sea flows rapidly loses heat, but thesea remains warm for a longer time. Land and seabreezed are local winds causedby the unequal heating of land and water. Inthis deflection they obey Ferrels Law which states, Anymoving body on the earth surface including a current ofair, tends to be deflected, the deflection being to the rightin the northern hemisphere and to the left in southernhemisphere. Owing to the rotation of the earth, the windsdo not blow due north and south, but are deflected. From the highpressure belts the air flows outwards to the regions oflow pressure. One of the main reasons for differences inpressure is unequal heating of the air. Similar conditionsare experienced in the Southern Hemisphere and theSouth Pole between September 25 and March 21. BetweenMarch 21 and September 23, when the North Pole is tiltedtowards the Sun, the days are longer than the nightsthroughout the Northern Hemisphere and there iscontinuous daylight at the North Pole.
At the Equator itselfdays and nights are equal throughout the year. On these dates, except at the Poles,(a) days and nights are equal all over the world and (b)the Sun rises exactly due east and set exactly due west atall places on the Earths surface. On March 21 (Vernal Equinox)and September 23 (Autumnal Equinox) the Sun is over-head at the Equator. 201-Emp dated as per Annexure-P of the memo ibid.
West Bengal Staff Selection Commission extends the following facilities to the. Exempted Category Cell under the Directorate of Employment. The inclinationof the Earths axis together with its revolution round theSun is the cause of the varying length of day and night indifferent parts of the world. In order to facilitate the processing work of applications for employment on compassionate ground, a common check-list was introduced vide Memo. Exempted Category Cell under Director of Employments, West Bengal to. Supply of photocopy of documents relating to the. There are two other lines, namely, Tropic ofCancer (23O N) and the Tropic of Capricon (23O S).The word tropic means, turning place. Disposal of the applications for recommendation for enrollment as exempted category to the Land Losers. The Equator is animaginary line drawn round the Earth midway betweenthe Poles. Position in the course of its revolution about the Sun,and to the inclination of its axis.
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