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In this study, the spatial and temporal patterns of changes in means and extreme events of temperature and precipitation across the Republic of Korea over the last 35 years (1973-2007) are examined. Over the study period, meteorological winter (December-February) mean minimum (maximum) temperature has increased by +0.54℃/decade (+0.6℃/decade), while there have been no significant changes in meteorological summer (June-August) mean temperatures. According to analyses of upper or lower 10th percentile-based extreme temperature indices, the annual frequency of cool nights (days) has decreased by -9.2 days/decade (-3.3 days/decade), while the annual frequency of warm nights (days) has increased by +4.9 days/decade (+6.8 days/decade). In contrast, the increase rates of summer warm nights (+8.0 days/℃) and days (+6.6 days/℃) relative to changes in summer means minimum and maximum temperatures means are greater than the decreasing rates of winter nights (-5.2 days/℃) and days (-4.3 days/℃) relative to changes in winter temperatures. These results demonstrate that seasonal and diurnal asymmetric changes in extreme temperature events have occurred. Moreover, annual total precipitation has increased by 85.5 ㎜/decade particularly in July and August, which led to the shift of a bimodal behavior of summer precipitation into a multi-modal structure. These changes have resulted from the intensification of heavy rainfall events above 40mm in recent decades, and spatially the statistically-significant increases in these heavy rainfall events are observed around the Taebaek mountain region.
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- Publisher :The Korean Geographical Society
- Publisher(Ko) :대한지리학회
- Journal Title :Journal of the Korean Geographical Society
- Journal Title(Ko) :대한지리학회지
- Volume : 43
- No :5
- Pages :681-700