Changes in the emissivity of the Sun violate the circulation mechanism of the moisture cycle and precipitation, absolute humidity, temperature regime of the active layer of soil and water. The deviation of the moisture cycle from the normal state of the Amudarya river basin is subject to certain laws in the solar cycle, for example, 2000-2001. droughts caused damage to the national economy in the lower reaches of the river, more than 67.5 billion sums in arbitrary units.