• 문화기술의 융합
• /
• 제9권4호
• /
• pp.121-125
• /
• 2023

겨울철에는 제주의 서귀포와 중문 등지는 제주시 지역에 비해 기온이 2~3℃가 따뜻하다. 이유는 한라산을 넘은 북풍이 한라산 백록담을 넘고 해발 1600m의 돈내코의 세로 300m 가로 260m 수직 암벽면을 지나면 차가운 공기가 따뜻한 공기로 변하는 단열압축으로 그 온기가 돈내코를 타서 서귀포와 중문으로 날아가기 때문이다. 반대로 여름철에 서귀포 바다를 오른 남풍은 한라산을 넘고 아흔(99)골을 지나면 후덥지근한 습도를 머금은 기온으로 변해 제주시는 무덥다. 즉, 제귀지풍과 귀제지풍 때문이다.

• 한국환경과학회지
• /
• 제27권7호
• /
• pp.531-541
• /
• 2018

Road freezing caused by snowfall during wintertime causes traffic congestion and many accidents. To prevent such problems, we developed, in this study, a system to predict road freezing based on weather forecast data and the freezing generation modules. The weather forecast data were obtained from a high-resolution model with 1 km resolution for Jeju Island from 00:00 KST on December 1, 2017, to 23:00 KST on February 28, 2018. The results of the weather forecast data show that index of agreement (IOA) temperature was higher than 0.85 at all points, and that for wind speed was higher than 0.7 except in Seogwipo city. In order to evaluate the results of the freezing predictions, we used model evaluation metrics obtained from a confusion matrix. These metrics revealed that, the Imacho module showed good performance in precision and accuracy and that the Karlsson module showed good performance in specificity and FP rate. In particular, Cohen's kappa value was shown to be excellent for both modules, demonstrating that the algorithm is reliable. The superiority of both the modules shows that the new system can prevent traffic problems related to road freezing in the Jeju area during wintertime.