scholarly journals Satellite-Based Estimation of Particulate Organic Carbon Export in the Northern South China Sea

2018 ◽  
Vol 123 (11) ◽  
pp. 8227-8246 ◽  
Author(s):  
Teng Li ◽  
Yan Bai ◽  
Xianqiang He ◽  
Yuyuan Xie ◽  
Xiaoyan Chen ◽  
...  
Keyword(s):  
Organic Carbon ◽  
South China Sea ◽  
Particulate Organic Carbon ◽  
South China ◽  
Northern South China Sea ◽  
Carbon Export ◽  
China Sea

scholarly journals The Impact of Eddies on Nutrient Supply, Diatom Biomass and Carbon Export in the Northern South China Sea

2020 ◽  
Vol 8 ◽  
Author(s):  
Yung‐Yen Shih ◽  
Chin‐Chang Hung ◽  
Sing‐how Tuo ◽  
Huan‐Jie Shao ◽  
Chun Hoe Chow ◽  
...  
Keyword(s):  
Organic Carbon ◽  
South China Sea ◽  
Water Column ◽  
South China ◽  
Northern South China Sea ◽  
Euphotic Zone ◽  
Nutrient Supply ◽  
Carbon Export ◽  
China Sea ◽  
Poc Flux

We have investigated the effect of eddies (cold and warm eddies, CEs and WEs) on the nutrient supply to the euphotic zone and the organic carbon export from the euphotic zone to deeper parts of the water column in the northern South China Sea. Besides basic hydrographic and biogeochemical parameters, the flux of particulate organic carbon (POC), a critical index of the strength of the oceanic biological pump, was also measured at several locations within two CEs and one WE using floating sediment traps deployed below the euphotic zone. The POC flux associated with the CEs (85 ± 55 mg-C m−2 d−1) was significantly higher than that associated with the WE (20 ± 7 mg-C m−2 d−1). This was related to differences in the density structure of the water column between the two types of eddies. Within the core of the WE, downwelling created intense stratification which hindered the upward mixing of nutrients and favored the growth of small phytoplankton species. Near the periphery of the WE, nutrient replenishment from below did take place, but only to a limited extent. By far the strongest upwelling was associated with the CEs, bringing nutrients into the lower portion (∼50 m) of the euphotic zone and fueling the growth of larger-cell phytoplankton such as centric diatoms (e.g., Chaetoceros, Coscinodiscus) and dinoflagellates (e.g., Ceratium). A significant finding that emerged from all the results was the positive relationship between the phytoplankton carbon content in the subsurface layer (where the chlorophyll a maximum occurs) and the POC flux to the deep sea.

234Th/238U disequilibrium and particulate organic carbon export in the northwestern South China Sea

2011 ◽  
Vol 30 (3) ◽  
pp. 55-62 ◽  
Author(s):  
Hao Ma ◽  
Zhi Zeng ◽  
Wen Yu ◽  
Jianhua He ◽  
Liqi Chen ◽  
...  
Keyword(s):  
Organic Carbon ◽  
South China Sea ◽  
Particulate Organic Carbon ◽  
South China ◽  
Carbon Export ◽  
China Sea
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