최근 4년간(2005~2008) 울릉도와 독도의 강수 및 기온 특성

Abstract

Characteristics of precipitation and temperature in Ulleung-do and Dok-do were analyzed with hourly accumulated precipitation and mean temperature data obtained from Automatic Weather System(AWS) for latest four years(2005~2008). In Ulleung-do, total annual mean precipitation for this period is 1,574.4 mm, which shows larger amount than 1434.2 mm of whole Korean peninsula for latest 10 years(1999~2008) and 1,236.2 mm at Ulleung-do on common years(1971~2000), shows that the trend of precipitation gradually increases during the recent years. This amount is also 1.4 times larger than the total annual mean precipitation of 660.1 mm in Dok-do. Mean precipitation intensity(mm <TEX>$h^{-1}$</TEX>) at each time of a day in each month at Ulleung-do represents that the maximum values larger than <TEX>$3.0\;mm\;h^{-1}$</TEX> were shown in May and on 0200 LST, whereas these were found in August and 0700 LST with <TEX>$3.1\;mm\;h^{-1}$</TEX> in Dok-do. The difference of the precipitation amount and its intensity between Uleung-do and Dok-do is explained by the topological effect came from each covering area, and this fact is also identified from similar comparison of the precipitation characteristics for the islands in West Sea. The annual mean temperature of <TEX>$14.0^{\circ}C$</TEX> in Dok-do is <TEX>$1.2^{\circ}C$</TEX> higher than that of <TEX>$12.8^{\circ}C$</TEX> in Ulleung-do. Trends of monthly mean temperature in both islands are shown to increase for the observed period.