How come there have been more rainy days in recent years?

The increase in rainy days in recent years may be related to the following factors:

Climate change: Global climate change is an important factor. Climate change leads to changes in the atmospheric circulation system, which may increase the frequency and intensity of rainfall. Especially in some areas, global warming may lead to more evaporation of water vapor and increased atmospheric humidity, thus increasing the possibility of rainfall.

2. Natural climate change cycle: There are many periodic changes in the earth's climate system, such as El Ni? o-Southern Oscillation (ENSO). These natural changes may lead to an increase in rainfall in a specific period or region.

3. Urbanization and land use change: Urbanization and land use change may affect the energy balance and water cycle of the surface. A large number of cement and building structures will increase the heat island effect in urban areas, leading to local temperature rise. At the same time, urbanization will also destroy the natural ecosystem, affect the vegetation coverage and land water conservation capacity, and then affect the distribution of surface runoff and rainfall.

4. Periodic change of meteorological system: In addition to global climate change, some atmospheric circulation models and weather systems also have periodic changes, such as sea surface temperature and ocean vortex in the Pacific Ocean and Atlantic Ocean. These changes may lead to rainy weather in a certain year or a certain period of time. It should be pointed out that the relative contribution of the above factors may vary from region to region and from specific environment. If a more detailed explanation is needed, it is suggested to consult meteorologists or local meteorological agencies to understand the specific reasons for the local rainy weather changes.