Published 2018-12-01
“…The results showed: (1) The Onset, Retreat and Length of Rainy
Season (O-RS, R-RS and L-RS) experienced an obvious inter annual and decadal variability, and they also had a good correlation with El Niño (La Niña), with some differences from those found in South Korea; (2) The linear trend of O-RS was
1.9day/decade during 1960–2007, indicating a gradually delayed O-RS, and the R-RS were getting earlier with a rate of −2.7day/decade, leading to a shortening L-RS at a rate of −4.7day/decade; (3) Regional differences of the numbers of Torrential Rain (TR) were obvious, which was related to the orographic effect, with the south and northwest of the study area registering the most frequent TR events; We also found that the frequency, intensity and amount of annual TR events generally increased during the last 4 decades; (4) The annual number of TR events with amount of precipitation more than 100 mm/
6 h increased from 4.2 times (1974–1983) to 7.4 times (2003–2012), and the annual number of extremely intense TR more than 200mm/12 h also increased from 0.
6 times to 1.2 times over the same two time periods. …”
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