We know, the main source of energy on earth is solar radiation. Warming by the sun which regularly moves to the north-south causes a change in heating patterns associated with wind patterns and rainfall. That is the change of season. But with the heat trapped in the atmosphere due to global warming, the pattern of atmospheric dynamics has changed. Nature makes new equilibrium. No longer the regularity we usually experience, there are anomalies (deviations).
Drought, high rainfall, high winds, and high waves are just a matter of changes in energy distribution that cause changes in the warming of the earth's surface (land and sea) that change convection and atmospheric dynamics. Floods and landslides are also natural ways to balance themselves because the carrying capacity of the environment is damaged by humans. Bald hills and rivers and waterways are shallow or blocked due to erosion and garbage.
Like what anyway global warming? Global warming is only known from the data, because the changes are relatively small but in the long run there will be changes. The heat we experience everyday is caused more by local warming which depends on cloud coverage and the condition of the surrounding environment (the presence of trees and the heat absorption properties of objects around us). In urban areas, local warming is more severe than in rural areas known as “urban heat islands” (urban heat island), because the city tends to decrease trees and asphalt roads and concrete buildings are effective catchers and heat transmitters.
The Goddard Institute for Space Studies website under NASA provides a very good global temperature database (land and ocean) for global warming research material. Below is shown the monthly average temperature increase (January – December) from the last 30 years climatological data (1981 – 2010) compared to the data of the previous 30 years (1951-1980). It is generally seen that most areas experience warm-up with an indication of yellow to red. A small portion of them have cooled in green to blue.
The equatorial region (including Indonesia) averages about 0.5 degrees warming. Whereas the area around the poles in winter experiences a higher warming, around 1.2 degrees. In terms of numbers it seems small, but the impact is extraordinary. Changes in temperature in such a degree mean a large amount of energy accumulated in the region. The impact is changes in air circulation associated with weather changes (short term) and climate (long term).