COMPARISON AND ANALYSIS OF FUTURE HEAVY PRECIPITATION AND EXTREMELY HEAVY PRECIPITATION IN SEVEN MAJOR REGIONS OF CHINA FROM 2010 TO 2099 UNDER THE BACKGROUND OF GEOENGINEERING
Geoengineering, as an important means to influencing the global climate, has important practical and scientific value. At present, the study on the influence of geoengineering on extremely precipitation is still in the initial stage. This study uses daily precipitation datasets from the BNU-ESM model of the geoengineering (G4 experiment) and the non geoengineering (RCP4.5). Taking 95% and 99% quantiles as thresholds for heavy precipitation and extremely heavy precipitation, different characteristics of heavy precipitation and extremely heavy precipitation in China and seven geographical divisions during 2010 2099 (whole research period), 20202069 (geoengineering implementation period) and 20702099 (post-geoengineering implementation period) in two scenarios are compared respectively. The results are shown as follows: The geoengineering is beneficial to the increase of heavy precipitation and extremely heavy precipitation in most areas of China during 20102099. In 20202069, the years of the implementation of geoengineering, heavy precipitation and extremely heavy precipitation in most areas of China are restrained. In 20702099, the years after the implementation of geoengineering, the follow-up effect of geoengineering is in favor of the increase of heavy precipitation and extremely heavy precipitation in most areas of China. The trend of heavy precipitation and extremely heavy precipitation in seven geographical divisions has certain regional differences in different research periods, and this difference is manifested in different regions at different times.