Tracing Floating Green Algae Blooms in the Yellow Sea and the East China Sea using GOCI satellite data and Lagrangian Transport Simulations

Title
Tracing Floating Green Algae Blooms in the Yellow Sea and the East China Sea using GOCI satellite data and Lagrangian Transport Simulations
Author(s)
손영백; 최병주; 김용훈; 박영규
KIOST Author(s)
Son, Young Baek(손영백)Park, Young Gyu(박영규)
Publication Year
2014-03-19
Abstract
In an image from the Geostationary Ocean Color Imager (GOCI) taken on 13 June 2011, a recurrent floating green algae bloom was detected around Qingdao. To detect the bloom an index based on multi-spectral band ratios using three wavelengths (555, 660, 745 nm) was utilized. One month later, the GOCI images detected widespread floating green algae patches (east-west elongated) across the Yellow Sea and East China Sea (YS, ECS). The presence of the patches was confirmed from various oceanic observation cruises. Lagrangian particle tracking experiments were conducted to understand the pathway of the floating green algae patches and interpret the physical forcing factors that affect the distribution and advection of the floating green algae. The numerical simulation results indicated that dominant southerly winds during June and July 2011 were related to offshore movement of the floating green algae, especially their eastward extension in the YS/ECS. An infrequent and unusual event occurred in June 2011: a typhoon MEARI, caused the green algae to detach from the coast and initiated movement to the east. After the typhoon event, sea surface temperature recovered rapidly enough to grow the floating green algae, and wind and local current controlled the movement of the massive floating algae patches (coastal accumulation or offshore advection in the YS/ECS). Analysis of the floating green algae pixels’ movement during pas (555, 660, 745 nm) was utilized. One month later, the GOCI images detected widespread floating green algae patches (east-west elongated) across the Yellow Sea and East China Sea (YS, ECS). The presence of the patches was confirmed from various oceanic observation cruises. Lagrangian particle tracking experiments were conducted to understand the pathway of the floating green algae patches and interpret the physical forcing factors that affect the distribution and advection of the floating green algae. The numerical simulation results indicated that dominant southerly winds during June and July 2011 were related to offshore movement of the floating green algae, especially their eastward extension in the YS/ECS. An infrequent and unusual event occurred in June 2011: a typhoon MEARI, caused the green algae to detach from the coast and initiated movement to the east. After the typhoon event, sea surface temperature recovered rapidly enough to grow the floating green algae, and wind and local current controlled the movement of the massive floating algae patches (coastal accumulation or offshore advection in the YS/ECS). Analysis of the floating green algae pixels’ movement during pas
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/26399
Bibliographic Citation
The 3rd Joint PML-KIOST Workshop on, pp.23, 2014
Publisher
PML-KIOST
Type
Conference
Language
English
Publisher
PML-KIOST
Related Researcher
Research Interests

ocean circulation,ocean mixing,marine debris,해양순환,해양혼합,해양부유물

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