Seasonal Variability of Transparency and its Relationship to the Critical Depth in the Seas Adjacent to Japan.

Nagata, Hiroshi; Ogawa, Yoshihiko

doi:10.5928/kaiyou.6.351

Cited by 2 publications

(1 citation statement)

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“…These growth-limiting factors are in turn regulated by the physical processes of ocean circulation, mixed-layer dynamics, atmospheric-dust deposition, and the solar cycle. The East/Japan Sea experiences bimodal phytoplankton blooms in spring and fall, as do other temperate zones in the global oceans (Nagata, 1994;Ishizaka et al, 1997;Nagata and Ogawa, 1997;Kim et al, 2000;Yamada et al, 2004Yamada et al, , 2005 ocean color imagery has allowed large-spatial-scale observations of the seasonal development of phytoplankton biomass. Kim et al (2000) demonstrated that phytoplankton biomass observed in CZCS images exhibited a bimodal seasonal pattern of spring and fall blooms in the East/Japan Sea.…”

Section: Bgdmentioning

confidence: 99%

Eddy- and wind-sustained moderate primary productivity in the temperate East Sea (Sea of Japan)

Hong

Lee

Yang

et al. 2013

Preprint

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As part of the Dokdo East Sea Time Series Studies (DETS) in the East/Japan Sea, a DETS buoy system was moored on the 130 m deep continental shelf off the Dok Islets in the central part of the East Sea. Chlorophyll a concentrations in the surface water observed by the DETS buoy system exhibited low-frequency bimodal variations in the annual chlorophyll a concentration due to a spring phytoplankton bloom and a smaller fall bloom. In addition, between late spring and early fall when the water column is stratified, frequent low-concentration maxima occurred, which appear to have been triggered by the injection of nutrient-rich subsurface water to the sunlit surface water. The primary productivity in the nutrient-depleted surface ocean was found to be enhanced by subsurface water upwelling where the wind and water move in the same direction as the mesoscale eddy. New observations in the East/Japan Sea based on time-series measurements of chlorophyll a, wind, and other oceanographic variables at fixed sites in the center of the sea and using satellite measurements reveal that the vertical movement of water caused by wind-eddy interactions depends on the relative angle between the wind and the water current. The wind-eddy interaction appears to contribute to the unusually high primary productivity in the region where it was often sustained by the long-lived warm and cold eddies

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Section: Bgdmentioning

confidence: 99%