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| Ocean Cimate in Jeju Island |
Located in eastern region of the continent and in the mid-latitudes of the Northern Hemisphere, Jeju has strong characteristics of east-coast climate. It experiences clear changes of season because of its geographic setting as a lone island off in a distant sea. Jeju experiences relatively short winters and longer summers. While it is affected, as other areas in Korea, by the northwest wintertime monsoon, Jeju is also affected by the southwest and southeast monsoons in summertime. Hallasan, being in the center of the island, causes climatic characteristics of each region. Climatic changes due to the surrounding sea waters and are responsible for significant influences on various geographical features and also on the lives of the regions inhabitants. According to Koppen's classification of climate, the climate of Jeju is classed as a subtropical humid climate so that most areas, except mountainous regions, maintain a mild winter with relatively consistent precipitation.
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| Sanbang in Jeju Island |
The precipitation of Jeju is influenced mainly through cyclone activity: precipitation of seasonal rain takes place mostly in summer months and precipitation caused by typhoons takes place in both summer and autumn. There is also a very limited amount of precipitation caused by North Pacific anticyclone activity in summer months and Siberian anticyclone activity in wintertime. Precipitation is largely caused by southwest and southeast air currents. In wintertime precipitation is often caused by the northwest air current.
Jeju has the highest annual precipitation of Korea ranging from 1,000 to 1,800 mm. However, the precipitation distribution in Jeju Island is not evenly distributed as the average annual precipitation of Gosan.
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| Sea Cliff |
Due to Jeju’s frequent storms that hit the island monthly, the best predictor for what coastal landforms in Jeju may look in the future will be determined by the erosion patterns displayed on the island. Erosional landforms are created by the breaking down of rock formations over time due to outside forces and conditions. Natural landscapes in Jeju Island was formed from volcanic activity. As a result, the drainage system, mountain system and coastal topography of Jeju show specific characteristics related to how and when the volcanic activities occurred. The island as a whole formed from a shield volcano with Hallasan as a central, and main, eruptive center. The total coastline, of approximately 253 km is mostly made up of rocky shores of exposed volcanic rock, and occasionally small-sized pocket beaches with sand dunes in some areas.
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