Discussion

Match the following :

Air mass symbol	Properties
(a) CP	(i) High temperature low moisture content
(b) CT	(ii) High temperature and humidity
(c) E	(iii) Low temperature, low humidity remaining constant
(d) mT	(iv) Moderately high temperatures, high relative and specific humidity

Answer: B

The correct matching is (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv).

cP, continental polar: forms over cold land, so it has low temperature and low humidity (iii).
cT, continental tropical: forms over hot deserts, so it has high temperature and low moisture (i).
E, equatorial: forms over warm equatorial oceans, so it has high temperature and humidity (ii).
mT, maritime tropical: forms over warm subtropical oceans, with moderately high temperature and high relative and specific humidity (iv).

The other codes give cP or cT the warm, moist properties of the oceanic air masses, which contradicts their continental source regions.

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