Desert climate air motion; dry atmosphere near the surface and aloft; the exacerbated exposure to the sun where solar angles are always high. Cold desert climates ("BWk") usually feature hot (or warm in a few instances), dry summers, though summers are not typically as hot as hot desert climates. Unlike hot desert climates, cold desert climates tend to feature cold, dry winters. Snow tends to be rare in regions with this climate. The Gobi Desert in Mongolia is a classic example for cold deserts. Though hot in the summer, it shares the very cold winters of the rest of Central Asia. Cold
Gobi Desert are constantly changing. This is mostly due to the climate conditions before the growing season, which influence the rate of evapotranspiration and subsequent plant growth. The expansion of the Gobi is attributed mostly to human activities, notably deforestation, overgrazing, and depletion of water resources. China has tried various plans to slow the expansion of the desert, which have met with some small degree of success, but no major effects. The most recent project is called the Three-North Shelter Forest Program, huge strips of newly planted forests; the government hopes the forests will help stabilize the soil, retain moisture, and act