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http://dx.doi.org/10.7837/kosomes.2019.25.7.881

A Study of Long-term Trends of SST in the Korean Seas by Reconstructing Historical Oceanic Data  

Park, Myung-Hee (Ocean Climate&Ecology Research Division, National Institute of Fisheries Science)
Song, Ji-Young (Ocean Climate&Ecology Research Division, National Institute of Fisheries Science)
Han, In-Seong (Ocean Climate&Ecology Research Division, National Institute of Fisheries Science)
Lee, Joon-Soo (Ocean Climate&Ecology Research Division, National Institute of Fisheries Science)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.25, no.7, 2019 , pp. 881-897 More about this Journal
Abstract
We reconstructed and digitized the National Institute of Fisheries Science (NIFS) Serial Oceanographic observations (NSO) and Coastal Oceanographic observations (NCO) data attained prior to 1961 through historical oceanographic observation data rescue projects. Increasing trends of long-term sea surface temperature (SST) were shown from the NSO data of 21 available stations for the past 80 to 92 years. In general agreement with previous research results used in the data of the past 50 years, we calculated the rate of temperature rise. As a result of analyzing the spatial distribution of SST change rate in the Korean of shore region using selected oceanographic data, the West Sea and South Sea showed a higher tendency of temperature rise in the offshore area than in the coastal area. However, unlike the results of previous studies, the East Sea (Gangwon Line and Ulsan Line) showed a lower water temperature rise than the coastal stations. Annual fluctuations of NCO's SST data from 1989 to 1998 for three stations representing the East Sea, South Sea, and West Sea, (Jumunjin, Geomundo and Budo, respectively) revealed that the East Sea showed the highest SST increase for the 10 years. The increases were 1.63 ℃ at Jumunjin, 1.16 ℃ at Geomundo, and 0.79 ℃ at Budo. As a result of the investigation, it can be concluded that SST is repeatedly rising and falling with a period of 3 ~ 6 years. Especially, since the 1980s, most of the stations show positive anomalies of SST. Lastly, to understand ocean_atmosphere interactions, we analyzed the correlations between SST of the NCO stations and air temperature around them and the results were 0.76 for the South Sea (Geomundo), 0.34 for the West Sea (Budo), and 0.32 for the East Sea (Jumunjin) with the highest correlation in the South Sea.
Keywords
Data rescue; NSO; NCO; SST; SST anomaly; Correlation;
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Times Cited By KSCI : 2  (Citation Analysis)
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