NIFS announced that the average Ocean Climate Velocity over the recent 4 years (2020-2023) in the East Sea was 49.5km/10 yr, which was accelerated more than twice to the average 20.9km/10 yr in the 2010's.

* Ocean Climate Velocity: The speed of isopleth which moves from a wide sea area to the pole by climate change 

This research was conducted based on the sea surface temperature data accumulated by NIFS using the satellite, taking the East Sea as subject to the research. The East Sea in Korea has the characteristics of ocean. This research was the result of the first estimation on the average northward velocity a year for each isotherm in the East Sea since the 2000s, when it showed the distinct impact of ocean warming in Korean waters. 

In addition, when analyzing the average area for each isotherm, NIFS confirmed that the area under 12℃ decreased while the one over 18℃ has increased continuously, the latter now having reached to the area more than twice that of 2000s. 

It was believed to be an effect of the increase in radiation heat due to climate change and the continuous increase in the inflow of Tsushima Warm Current, TWC up to the present time since the 1990s.