Abstract
Abstract. In 1982, the red tide caused by Cochlodimium polykrikodies occurred at first in Jinhae Bay in Korea. Since then, it causes serious fisheries damage every year. In 2018, red tide occurred when high water temperature. We analyzed red tide occurrence pattern when high water temperature. Red tide occurrence date, occurrence area caused by the Cochlodinium polykrikoides were used provided by National Institute of Fisheries Science. SST data were used the GHRSST Level 4 OSTIA data provided by NOAA. The red tide occurred July 14 to September 2 in 2013, July 29 to October 4 in 2014, August 5 to September 23 in 2015, and July 23 to August 8 in 2018 in Korea. The nearest SST data from the red tide occurrence area were extracted. When red tide occurred, SST was 22~28 °C in 2013, 23~25 °C in 2014, 21~27 °C in 2015, 26~28 °C in 2018. SST in 2013 was increasing trend and 2015 was downward trend. SST in 2018 occurred at high water temperatures above 25 °C. The spatial pattern by using the self-organizing map (3x3 map), node 4 was the highest frequency (16.9%). It is considered that it appears at the beginning and end of red tide occurrence. Node 1 was 16.3% frequency, it showed at the end of 2014 and 2015. SST of node 1 and 4 maintained 22~23 °C on the southern sea of Korea. Node 9 was 13.9%, which is the late 2013 and 2018. Node 9 showed high temperature pattern of more than 26 °C in the southern sea of Korea.
Highlights
In 1982, the red tide caused by Cochlodimium polykrikodies(C. polykrikoides) occurred at first in Jinhae Bay in the South Sea of Korea
Comparing in the recent red tide occurrence and SST pattern, Red Tide Information System provided by NIFS is used
This study is investigated the relations of SST when red tide occurred, how SST pattern changes by applying SOM technique
Summary
In 1982, the red tide caused by Cochlodimium polykrikodies(C. polykrikoides) occurred at first in Jinhae Bay in the South Sea of Korea. The red tide caused the serious fisheries damages about $ 67 million(U.S dollar) in the South Sea of Korea in 1995. The red tide causes serious fisheries damage every year. It mainly occurs in the South Sea of Korea, which is three times higher than the East Sea of Korea(Lee et al, 2015). Sea water temperature is the most important causing the red tide, most of the red tide occurs 22~25 °C(Yoon, 2005; Oh et al, 2015). In Korea, red tide caused by C. polykrikodies, which is harmful species, is mostly occurs. In 2013, the concentration of C. polykrikodies more than 1000 cells/ml occurred 45 times(Hwang et al, 2017)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
