The global warming increases the precipitation in the mainland, especially in high latitudes while it decreases precipitation in some regions of Africa. The frequency and intensity of the extreme weather and climate events (El Ni?o, droughts, floods, thunderstorms, hail, storms, high temperatures and dust storms, etc.) are increasing.

The global climate in recent years is often "extreme"; the unusual weather to most of the northern hemisphere was unexpected. It has always been cool in Russia, but it was unbearably hot for two months in recent year; it has always been dry in Pakistan, but floods are often burst. China has sadly experienced a rare double test of "heavy rainfall and extreme drought", the geological disasters occur frequently in many regions.

World Meteorological Organization Global Weather Research Program leader Qasim Aspen said, over a hundred years, human activities continue to heat up the Earth, causing the Earth's atmosphere and ocean temperatures raise 1degree Celsius than that of a century ago. The ocean temperatures rise leads to more moisture evaporates into the atmosphere, and the atmospheric temperature will rise so that it will hold more water vapor. If the air maintains a normal circulation, it’s extremely unlikely to increase the average distribution of rainfall in most regions. Once the rainfall is in the case of congestion and rapid increase in one region, it will be hot and dry in another region. This is the relationship between the extreme weather phenomena and the global climate change.