Climate change and precipitation
With the increase of the average temperatures on the Еarth surface, the intensity of water evaporation in the atmosphere increases, which in turn leads to a total increase in precipitation. The effects of this increase will be different, as precipitation patterns vary around the world. In high latitudes, precipitation is likely to increase, while it is projected to decrease over large parts of the subtropics. Changes to monsoon precipitation are expected, which will vary by region.
“Heavy precipitation” refers to instances during which the amount of rain or snow experienced in a location substantially exceeds what is normal.
Climate change can affect the intensity and frequency of precipitation. Warmer oceans increase the amount of water that evaporates into the air. When more moisture-laden air moves over land or converges into a storm system, it can produce more intense precipitation—for example, heavier rain and snow storms. The potential impacts of heavy precipitation include crop damage, soil erosion, activation of landslides, an increase of flood risk, etc. In turn, such extreme natural phenomena can be accompanied by great material losses, as well as injuries and deaths of people and animals.
Increased rainfall intensity does not necessarily mean that the total amount of rainfall in a given area has increased. Often a series of heavy rains are combined with prolonged drought intervals.
Forecasts for changes in rainfall in Europe vary considerably across regions and seasons. Overall, annual rainfall is expected to increase in Northern Europe and decrease in Southern Europe.