Cloud identification & Atmospheric Stability 15. Identify the clouds labeled in the picture High clouds 6000 m A. B. C. D. E. Middle clouds 4000 m Low clouds 2000 m F A 900m 800m 700m 600m 500m › 400m 300m 200m 100m Surface C Height 1000m(1km) D B Earth's surface In nature, air cools as it rises. If no heat is added to this process, it is called "adiabatic". Adiabatic cooling of the atmosphere occurs at a rate of 10°C for every 1000m increase in height, so long as the air parcel remains unsaturated (dry). That is why it is called the dry adiabatic lapse rate. E 16. Calculate the temperature of an unsaturated air parcel at 100m increments as it rises from the Earth's surface. The surface temperature is 35°C.