Which of the following statements are correct about Airmasses and its characteristics 1 nb...........

Geography Atmosphere

Which of the following statements are correct about Airmasses and its characteristics?

1. It is a large body of air having little horizontal variation in temperature and moisture.

2. Areas with high pressure but little pressure gradient are ideal source regions.

3. A cold air mass is one which is colder than the underlying surface and associated with stability and no atmospheric turbulence.

4. A warm air mass is one which is warmer than the underlying surface and is associated with unstable weather conditions.

Select the correct answer using the code below:

1 and 2 only

2, 3 and 4 only

1, 3 and 4 only

1, 2, 3 and 4

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Explanation:

The air with distinctive characteristics in terms of temperature and humidity is called an air mass.

It is a large body of air having little horizontal variation in temperature and moisture. Source region should be extensive with gentle, divergent air circulation (slightly at highpressure).Areas with high pressure but little pressure differenceor pressure gradient are ideal source regions.There are no major source regions in the mid-latitudes as these regions are dominated bycyclonic and other disturbances.A cold air mass is one which is colder than the underlying surface and is associated with instability and atmospheric turbulence.A warm air mass is one which is warmer than the underlying surface and is associated with stable weather conditions.