Seasonal difference in linear trends of satellite-derived chlorophyll-a in the East China sea
- Seasonal difference in linear trends of satellite-derived chlorophyll-a in the East China sea
- Son, Y.B.; Jang, C.J.; Kim, S.-H.
- KIOST Author(s)
- Son, Young Baek(손영백); Jang, Chan Joo(장찬주)
- The purpose of this study is to investigate seasonal difference in linear trends in satellite-derived chlorophyll-a concentration (Chl-a) and their related environmental changes in the South Sea of Korea (SSK) and East China Sea (ECS) for recent 15 years (Jan. 1998~Dec. 2012) by analyzing climatological data of Chl-a, Rrs(555), sea surface wind (SSW) and nutrient. A linear trend analysis of Chl-a data reveals that, during recent 15 years, the spring bloom was enhanced in most of the ECS, while summer and fall blooms were weakened. The increased spring (Mar. - May) Chl-a was associated with strengthened winter (Dec. - Feb.) wind that probably provided more nutrient into the upper ocean from the deep. The causes of decreased summer (Jun. - Aug.) Chl-a in the northern ECS were uncertain, but seemed to be related with the nutrient limitation. Recently (after 2006), low-salinity Changjiang diluted water in the south of Jeju and the SSK had lower phosphate that caused increase in N/P ratio with Chl-a decrease. The decreased fall (Sep. - Nov.) Chl-a was associated with weakened wind that tends to entrain less nutrient into the upper ocean from the deep. This study suggests that phytoplankton in the ECS differently changes in response to environmental changes depending on season and region.
- Ocean and Polar Research, v.35, no.2, pp.147 - 155, 2013
- chlorophyll a; concentration (composition); environmental change; nutrient; phosphate; phytoplankton; salinity; satellite; seasonal variation; trend analysis; Cheju [Cheju (PRV/ISL)]; Cheju [South Korea]; East China Sea; Pacific Ocean; South Korea
- East china sea; Linear trend; Satellite-derived chlorophyll-a; Seasonal difference
- Related Researcher
upper ocean dynamics,regional climate modeling,ocean climate change,해양상층역학,지역기후모델링,해양기후변화
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