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Mesoscale Eddies Control the Timing of Spring Phytoplankton Blooms: A Case Study in the Japan Sea
Author(s) -
Maúre E. R.,
Ishizaka J.,
Sukigara C.,
Mino Y.,
Aiki H.,
Matsuno T.,
Tomita H.,
Goes J. I.,
Gomes H. R.
Publication year - 2017
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2017gl074359
Subject(s) - mixed layer , anticyclone , bloom , oceanography , spring bloom , mesoscale meteorology , phytoplankton , eddy , algal bloom , spring (device) , environmental science , geology , climatology , turbulence , meteorology , nutrient , geography , mechanical engineering , engineering , chemistry , organic chemistry
Satellite Chlorophyll a (CHL) data were used to investigate the influence of mesoscale anticyclonic eddies (AEs) and cyclonic eddies (CEs) on the timing of spring phytoplankton bloom initiation around the Yamato Basin (133–139°E and 35–39.5°N) in the Japan Sea, for the period 2002–2011. The results showed significant differences between AEs and CEs in the timing and initiation mechanism of the spring phytoplankton bloom. Blooms were initiated earlier in CEs which were characterized by shallow mixed‐layer depths (< 100 m). The early blooming preceded the end of winter cooling (i.e., while net heat flux ( Q 0 ) is still negative) and is initiated by the increased average light within the shallow mixed‐layer depth. Conversely, blooms appeared in the AEs despite deeper mixed‐layer depth (> 100 m) but close to the commencement of positive Q 0 . This suggests that the relaxation of turbulent mixing is crucial for the bloom initiation in AEs.