In this study, changes in climatological conditions around the KoreanPeninsula are estimated quantitatively using various types of high order statistical analyses. Thetemperature data collected from Incheon station ha...In this study, changes in climatological conditions around the KoreanPeninsula are estimated quantitatively using various types of high order statistical analyses. Thetemperature data collected from Incheon station have been analyzed for the assessment of the climatevariation. According to our analysis, the climate changes observed over the Korean Peninsula forthe last century are similar to the global observational data in many respects. First of all, thewarming trend [+1.5℃ (100 yr)^(-1)] and the overall evolving pattern throughout the century axequite similar to each other. The temperature change in the Korean Peninsula is about two to threetimes larger than that of the global scale which may partially be ascribed to the influence ofurbanization at mid and high latitudes. In this work, a new Winter Monsoon Index (WMI) is suggestedbased on the European continental scale circulation index (EU1) pattern. Our WMI is defined as thenormalized sea level pressure (SLP) difference in the winter period between the centers of the EastSea and west of Lake Baikal in Siberia, the two eastern centers of the EU1 action patterns. A strongsimilarity is found between the time series of the WMI and surface air temperature at Incheon. TheWMI has decreased gradually since the 1920s but has shifted to a rapid increasing trend in the lasttwo decades; it was in fact accompanied by a weakening of the Siberian High and a decreasing of thenortherly during winter. Our findings of the close correlations between the surface air temperatureat Incheon and the WMI strongly indicate that our newly suggested index is unique and can be used asan efficient tool to predict climate variability in Korea.展开更多
文摘In this study, changes in climatological conditions around the KoreanPeninsula are estimated quantitatively using various types of high order statistical analyses. Thetemperature data collected from Incheon station have been analyzed for the assessment of the climatevariation. According to our analysis, the climate changes observed over the Korean Peninsula forthe last century are similar to the global observational data in many respects. First of all, thewarming trend [+1.5℃ (100 yr)^(-1)] and the overall evolving pattern throughout the century axequite similar to each other. The temperature change in the Korean Peninsula is about two to threetimes larger than that of the global scale which may partially be ascribed to the influence ofurbanization at mid and high latitudes. In this work, a new Winter Monsoon Index (WMI) is suggestedbased on the European continental scale circulation index (EU1) pattern. Our WMI is defined as thenormalized sea level pressure (SLP) difference in the winter period between the centers of the EastSea and west of Lake Baikal in Siberia, the two eastern centers of the EU1 action patterns. A strongsimilarity is found between the time series of the WMI and surface air temperature at Incheon. TheWMI has decreased gradually since the 1920s but has shifted to a rapid increasing trend in the lasttwo decades; it was in fact accompanied by a weakening of the Siberian High and a decreasing of thenortherly during winter. Our findings of the close correlations between the surface air temperatureat Incheon and the WMI strongly indicate that our newly suggested index is unique and can be used asan efficient tool to predict climate variability in Korea.
