In the paper, we clarified the patterns of the variations of the extreme rainfall events in the study area and analyzed the possible circulation mechanism of rainfall variations in the study area during the recent period of 1961-2016 by a method of analogue, on the basis of a comprehensive analysis of extreme rainfall events at 151 PEOs (Place of Extreme Occurrence) for 1860–1909 the last >100 years in the Korea.
The main conclusions were drawn as follows:
(1) Extreme rainfall events by 5-year period had experienced remarkable decrease for 1860–1909, with an abrupt fall after shifting point of 1879–1880.
(2) Monthly extreme rainfall events had a statistical significant decrease for rainy season, with no evaluated for June; the pentad extreme rainfall events decreased from 29time/5-year to 7.3time/5-year from the earlier period to the later period. From July to September, decreasing rates were largest.
(3) All climatic zones except for north land showed significant decrease trends in extreme rainfall events, but no significant variation found for some typical pluvial regions.
(4) Applying an analogue method, it was proposed that the activity of the West Pacific subtropical high, which has a significant impact on rainfall and rainy season during the study period (1860-1909), has been enhanced, therefore typhoon activity in the study area may have been extremely limited.
This study is fundamental findings in the study area for the long-term climate change and the variability of the atmospheric circulation system, and it is a valuable result for researchers who share a global research project as the Atmospheric Circulation Reconstruction over the Earth (ACRE) in relation to climate change.
Our result was published with the title of "Extreme rainfall events variation during 1860~1909 in the Korean Peninsula: investigation of the possible circulation mechanism by a method of analogue" (https://doi.org/10.1016/ j.atmosres.2023.107120) in the journal "Atmospheric Research".
