高句麗의 平壤遷都 背景에 關한 一考察
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A Study of the Koguryo Dynasty's Capital Transfer to Pyongyang: Centred on the Anamaly Climate Changes Koguryo transferred it's capital from Kuknae to Pyongyang in AD 427. This period was it's best days. In the academic circle, there are three major opinions regarding the reason of the transfer. The most popular theory is that the capital transfer was due to the BeiWei's threat to Koguryo. Contrarily, some theories thought strengthening royal authority was the cause, and others thought that acquisition of the agricultural farm land was the reason. However, BeiWei's threat to Koguryo was just superficial cause. Therefore the view of BeiWei's threat is exaggerated. Also the view for the strengthening royal authority has no obvious historical records except the diplomatic note from Baekje's King Kaero to BeiWei. This note contains the Koguryo's King Jangsoo's purging of his opposing aristocrats. But it was written after 45 years since the capital transfer, so it might have contained the conflicts with the aristocrats after the transfer. Therefore this thesis claims another reason for the Koguryo's capital transfer. This point of view is related to the anamaly climate changes which is based on the study results of Chinese meteorologist Coching Chu. His "A Preliminary Study on the Climatic Fluctuations during the Last 5000 Years in China" shows us that the drastic changes in climate have resulted the drop of the average temperature for 2.5℃~3℃ around 5th century AD. Also we can find in Samkuksaki(The History of Three Kingdoms) that there were so many natural disasters at that time. So Kuknae Capital was vulnerable to food shortage and other related problems. Due to these reasons, Koguryo dynasty took a interest in Pyongyang. It had a mild climate and a wide agricultural space. Pyongyang is located at the center of Manchuria and the Korean Peninsula geographically, historically and culturally. Eventually King Kwanggaeto founded 9 temples, organized official rank system, used era name and the Taewangho title(the Title of Great King) to strengthen his control over Pyongyang. At last, King Jangsoo moved it's capital to Pyongyang in AD 427.