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Consider the following statements:
1. A cold front has precipitation more or less similar to convectional type precipitation.
2. Orographic precipitation is gentler and prolonged.
3. Orographic precipitation is restricted in terms of time of the day.
4. Frontal precipitation does not take place outside the temperate region.
Which of the statements given above are correct?
1 and 2 only
2 and 4 only
2 and 3 only
1, 2 and 4 only
Explanation: • A cold front is one in which cold air is aggressive and it cuts-off the warm air from the ground and forcibly uplifts the warm air to great heights in a narrow zone, resulting in precipitation almost similar to convectional type precipitation. The convectional precipitation is with larger drops, showery and short duration. • In orographic uplift, the warm air rises gradually and as it rises, it also spreads horizontally resulting in precipitation which is more likely to be gentler, widespread and prolonged. • Orographic precipitation has no restriction in terms of latitude, season and time of the day. It can occur when a moist parcel of air is forced to rise because of a barrier. • Frontal precipitation is primarily restricted to middle latitudes as fronts are rare and less significant in other regions. But the frontal systems of middle latitudes do travel to other regions and cause precipitation there, like for example, in north-west India during winter season, these systems (called Western Disturbances) cause precipitation.
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