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In this study, monthly rainfall data obtained from the Global Precipitation Climatology Center, which combines station-based records and grid-based global precipitation using satellite imagery, with 0.5 ° × 0.5 ° resolution, were used to analyze the characteristics of seasonal rainfall in East Asia (20 °N–60 °N, 100 °E–150 °E) between 1979 and 2010. In addition, this study used daily rainfall data for the period 1973–2010, obtained from 57 observatories managed by the Korea Meteorological Administration (KMA) to analyze the characteristics of rainfall in the KP (Figure 2 and Table 2). For the composite analysis, data were sorted into categories and comparing means for different CP El Niño categories. A composite analysis was applied for the climatology of the period 1981–2010 to examine the changing patterns of seasonal rainfall and extreme rainfall in East Asia including the KP. To complement the relatively low number of CP El Niño events, the bootstrap random resampling technique, which is commonly used in statistical analysis and applied hydroclimatological studies (Ripley 1987; Becker et al. 1988; Kundzewicz & Robson 2000), was employed by using 1,000 subsets of different CP El Niños with random replacement from historical observations (1973–2010), and the statistical test was performed at 90% confidence level.
Table 2

Rainfall information of Korea's five major river basins (1973–2010)

BasinsArea (km2)Annual rainfall (mm)Spring rainfall (mm)Summer rainfall (mm)Daily peak rainfall (mm)
Han River 38,421.8 1,237.2 201.9 748.9 163.4 
Nakdong River 31,712.0 1,165.4 229.7 648.0 164.8 
Geum River 17,537.0 1,229.1 217.7 701.5 159.8 
Seomjin River 8,299.1 1,384.9 258.9 780.4 197.0 
Yeongsan River 7,598.7 1,303.1 246.7 709.0 262.3 
BasinsArea (km2)Annual rainfall (mm)Spring rainfall (mm)Summer rainfall (mm)Daily peak rainfall (mm)
Han River 38,421.8 1,237.2 201.9 748.9 163.4 
Nakdong River 31,712.0 1,165.4 229.7 648.0 164.8 
Geum River 17,537.0 1,229.1 217.7 701.5 159.8 
Seomjin River 8,299.1 1,384.9 258.9 780.4 197.0 
Yeongsan River 7,598.7 1,303.1 246.7 709.0 262.3 
Figure 2

The five major river basins in Korea and the KMA observatory locations.

Figure 2

The five major river basins in Korea and the KMA observatory locations.

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