Normally the temperature decreases with the increase in height from the Earths surface because 1 nbs...........

Geography World climates

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Normally, the temperature decreases with the increase in height from the Earth's surface, because

1. Atmosphere can be heated upwards mainly from the Earth's surface

2. There is more moisture in the upper atmosphere

3. Air is less dense in the upper atmosphere

Select the correct answer using the codes given below.

1 only

2 and 3 only

1 and 3 only

1, 2 and 3

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Explanation:

First statement is correct only.

Earth's surface primarily emits long wave radiation. The very lowest part of the atmosphere, called the boundary layer (up to about 1.5 kilometers on a normal day) warms from the warmer earth surface (mostly by long wave radiation), with the warmer air being mixed upwards by convective air parcels (air warmer than the surrounding air) and mechanical turbulence (from wind). As the air rises (and expands, thereby decreasing in air pressure) it cools, resulting in the adiabatic lapse rate . Since temperature and pressure are roughly proportional for the same volume of air, the temperature decreases with height (during the day).