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Çѱ¹¼öÀÚ¿øÇÐȸ / v.44, no.5, 2011³â, pp.339-350
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±â»óÀÎÀÚ¿Í ºñÁ¤»ó¼º ºóµµÇؼ® ¸ðÇüÀ» ÀÌ¿ëÇÑ ³«µ¿°À¯¿ªÀÇ °èÀý°¼ö·® Àü¸Á
( Seasonal Rainfall Outlook of Nakdong River Basin Using Nonstationary Frequency Analysis Model and Climate Information ) |
±ÇÇöÇÑ;ÀÌÁ¤ÁÖ; ÀüºÏ´ëÇб³ Åä¸ñ°øÇаú;ÀüºÏ´ëÇб³ Åä¸ñ°øÇаú;
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º» ¿¬±¸¿¡¼´Â Bayesian Åë°è±â¹ýÀ» ÀÌ¿ëÇÑ ºñÁ¤»ó¼º ºóµµÇؼ®¸ðÇüÀ» Åä´ë·Î ¿ÜºÎ ±â»óÀÎÀÚ¿¡ ÀÇÇÑ º¯µ¿¼ºÀ» °í·ÁÇÒ ¼ö ÀÖ´Â °èÀý°¼ö·® ¿¹Ãø¸ðÇüÀ» ±¸ÃàÇÏ¿´À¸¸ç, ³«µ¿°À¯¿ª³»ÀÇ 10°³ °üÃø¼Ò¿¡¼ °üÃøµÈ 37³â°£ÀÇ °¼ö·® ÀڷḦ ÀÌ¿ëÇÏ¿© ¿¬µµº° ¿©¸§°¼ö·®À» ÃßÃâÇϰí ÀÌµé °üÃø¼ÒÀÇ ¿©¸§°¼ö·®¿¡ ¹°¸®ÀûÀÎ ¿µÇâÀ» ¹ÌÄ¡´Â ±â»óÀÎÀڷμ SST(sea surface temperature)¿Í OLR(outgoing longwave radiation)À» °ø°£»ó°ü¼ºÀ» °ËÅäÇÏ¿© ¼±Á¤ÇÏ¿´´Ù. ¸ðÇüÀÇ ÀûÇÕ¼ºÀ» °ËÅäÇϱâ À§ÇØ 2010³â ¿©¸§°¼ö·® »çÈÄ È®·üºÐÆ÷ÀÇ Áß¾Ó°ª°ú °üÃøÄ¡¸¦ ºñ±³ÇÏ¿´À¸¸ç, ±× °á°ú °¢°¢ 858.2mm¿Í 888.1mm·Î, ÀÌ´Â ±¸ÃàµÈ ¸ðÇüÀÌ ÀûÀýÇÏ°Ô ¿©¸§°¼ö·®À» ¸ðÀÇÇϰí ÀÖÀ½À» º¸¿©ÁØ´Ù. 2010³â °Ü¿ï SST °üÃø °ª°ú, ¿¹³â Æò±Õ°ªÀ¸·Î °¡Á¤ÇÑ 2011³â 6¿ù OLRÀ» ÀÌ¿ëÇÏ¿© 2011³â ¿©¸§°¼ö·®À» ¿¹ÃøÇÏ¿´´Ù. ¿¹ÃøµÈ 2011³â ¿©¸§°¼ö·®Àº 967.7mm·Î, È®·üÀûÀ¸·Î ¿¹³â ¿©¸§°¼ö·®ÀÇ Æò±ÕÀÎ 680mm¸¦ »óȸÇÒ È®·üÀÌ 92.9% ÀÌ»óÀÎ °ÍÀ¸·Î ³ªÅ¸³µÀ¸¸ç, ¶ÇÇÑ 50³â ºóµµ¿¡ ÇØ´çÇÏ´Â ¿©¸§°¼ö·®À» ÃßÁ¤ÇÑ °á°ú, 50³â ºóµµ ¿©¸§°¼ö·® 1400mm¸¦ »óȸÇÒ È®·üµµ ¾à 73.7%ÀÎ °ÍÀ¸·Î ºÐ¼®µÇ¾ú´Ù. |
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This study developed a climate informed Bayesian nonstationary frequency model which allows us to forecast seasonal summer rainfall at Nakdong River. We constructed a 37-year summer rainfall data set from 10 weather stations within Nakdong river basin, and two climate indices from sea surface temperature (SST) and outgoing longwave radiation (OLR) were derived through correlation analysis. The selected SST and OLR have been widely acknowledged as a climate driver for summer rainfall. The developed model was applied first to the 2010-year summer rainfall (888.1 mm) in order to assure ourself. We demonstrated model performance by comparing posterior distributions. It was confirmed that the proposed model is able to produce a reasonable forecast. The forecasted value is about 858.2 mm, and the difference between forecast and observation is about 30 mm. As the second case study, 2011-year summer rainfall forecast was made using an observed winter SSTs and an assumed 50% value of OLRs. The forecasted value is 967.7 mm and associated exceedance probability over average summer rainfall 680 mm is 92.9%. In addition, 50-year return period for summer rainfall was projected through the nonstationary frequency model. An exceedance probability over 1,400 mm corresponding to the 50-year return level is about 73.7%. |
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Ű¿öµå |
ºñÁ¤»ó¼º ºóµµÇؼ®;±â»óÀÎÀÚ;°èÀý°¼ö·®;ÇØ¼ö¸é¿Âµµ;Bayesian;nonstationary frequency analysis;climate driver;SST;OLR; |
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.44, no.5, 2011³â, pp.339-350
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201118834665863)
¾ð¾î : Çѱ¹¾î |
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³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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