호남지방 기온의 경년변화 특성

Abstract

The observational temperature at 15 meteorological sites in Honam district during 86 year are analyzed and the interannual variation of air temperature are also studied. Results are as follows: Annual mean air temperature in Honam districts is 12.7℃, and annual maximum and minimum mean air temperature in Honam district are 18.1℃ and 8.7℃, respectively. August and January shown the lowest and highest value of monthly mean air temperature in all observation sites, and mean air temperature of August and January are 25.2℃ and -0.2℃, respectively. Then its annual range is 25.4℃. Before 1950 interannual variation of air temperature is much lower than average values and then after 1950 to the latter half of 1960s the amplitude of air temperature variation clearly tends to be grower, and the width of the variation become narrow and irregular after the latter half of 1960s. The annual mean air temperature and maximum air temperature become 0.31℃ and 0.1℃ higher than average values and amplitude of air temperature also become larger. The air temperature variations in autumn and winter and are tend to be incline and those of summer and fall show opposite pattern. Comparing the tendency of air temperature variation in inland and coastal district, annual mean air temperature inland district become lower by 0.2℃ but the same values in coastal district increase by 0.3℃. And variations of maximum air temperature in inland and coastal district have shown same tendency with 0.4℃ and 0.5℃ increase but although minimum air tempera- ture inland district show 0.8℃ decrease, the minimum air temperature in coastal district does not change. These results are caused by difference of geographical environment between inland and coastal district. The correlation coefficient of annual mean air temperature of inland which was highest factor of correlation coefficient for interannual variation of air temperature is 0.92. The correlation coefficient of minimum air temperature and mean air temperature of coastal district is 0.91 and 0.88, respectively. From the results above mentioned above annual mean air temperature in Honam district increased by 0.3℃ and the oscillation amplitude of air temperature becomes larger due to be increase of maximum air tempera- ture and decrease of minimum air temperature.