Observe the map given above and study the distribution of air pressure

1.	Observe the map given above and study the distribution of air pressure and answer the following:i. The nature of the isobars.ii. High and low pressure belts and their latitudinal position.iii. The direction of the isobars and the distance between successive isobars over the oceans and continents.iv. Comparison of the isobars in the northern and the southern hemispheres.
Answer» i. The isobars are joining places of equal air pressure on the map. ii. (i) The latitudinal position of high pressure belt is between 25° & 35° parallels and between 80° & 90° parallels in both the hemisphere. (ii) The latitudinal position of low pressure belt is between 0° & 5° parallels and between 55° & 65° parallels in both the hemispheres. iii. (i) In the northern hemisphere most of the isobars are in southwest to north east direction over the continents. Also the distance between the isobars varies. (ii) Closely spaced isobars indicate large pressure changes over a small area. Widely spaced isobars indicate gentle or gradual pressure change. (iii) In the southern hemisphere, the isobars extend in east-west direction. The distance between the isobars is fairly constant over the oceans & so the isobars are fairly parallel to each other. iv. In the northern hemisphere the isobars are far spaced and uneven, whereas in the southern hemispheres it is closely spaced and parallel.

Observe the map given above and study the distribution of air pressure and answer the following:i. The nature of the isobars.ii. High and low pressure belts and their latitudinal position.iii. The direction of the isobars and the distance between successive isobars over the oceans and continents.iv. Comparison of the isobars in the northern and the southern hemispheres.

Answer»

i. The isobars are joining places of equal air pressure on the map.

ii. (i) The latitudinal position of high pressure belt is between 25° & 35° parallels and between 80° & 90° parallels in both the hemisphere.

(ii) The latitudinal position of low pressure belt is between 0° & 5° parallels and between 55° & 65° parallels in both the hemispheres.

iii. (i) In the northern hemisphere most of the isobars are in southwest to north east direction over the continents. Also the distance between the isobars varies.

(ii) Closely spaced isobars indicate large pressure changes over a small area. Widely spaced isobars indicate gentle or gradual pressure change.

(iii) In the southern hemisphere, the isobars extend in east-west direction. The distance between the isobars is fairly constant over the oceans & so the isobars are fairly parallel to each other.

iv. In the northern hemisphere the isobars are far spaced and uneven, whereas in the southern hemispheres it is closely spaced and parallel.

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