Effect of SST change on phytoplankton chlorophyll in Northwest Pacific
LIN Xu
HU Song
ZHU Yuhang
ZHUO Mengting
CHEN Xinjun
LIU Bilin
Abstract：The long-term trends of sea surface chlorophyll and sea surface temperature of northwest Pa-cific were analyzed.The time distribution of chlorophyll was divided into bloom outbreaking and non-outbreaking times with the defined threshold method.It was found that the annual algal bloom days have a short oscillation due to the periodic sea surface temperature change(ENSO),and a downward trend of 2.80 D/y.The observation sea areas included three sites on the longitude section near the Hokkaido fishing ground.The trend analysis showed that the outbreaking time of algal blooms in spring comes first each year,with an average advancing time of 0.6 days/year,and the algal bloom in northwest Pacific may come earlier and sustain shorter in future.When studying the impact of climate change on phytoplankton in northwest Pacific,we should consider the factors of periodic fluctuations of sea surface temperature and changes of phytoplankton phenology.
Keywords：phytoplanktonSSTchlorophyllalgal bloomNorthwest Pacific
Publication Date：2025-06-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：7( 113-119 )