Temporal Change of Export Production at Xisha of the Northern South China Sea

Chen, Yinchao; Wu, Zhiwei; Li, Qian P.

doi:10.1029/2017jc013619

Cited by 10 publications

(8 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Meanwhile, the upward advection brought up deep‐water nutrients to the euphotic zone to support an intense biological production in the NSCS during the late winter. These results are consistent with previous findings at two time‐series stations of the NSCS (Y. Chen et al., 2018; Li et al., 2015). Further model analyses suggested that higher nutrient advection of the NSCS during the late winter was caused by mesoscale eddies, due to the energetic cyclonic gyre in the NSCS with active eddy activities.…”

Section: Discussionsupporting

confidence: 93%

“…These results are consistent with previous findings at two time-series stations of the NSCS (Y. Chen et al, 2018;Li et al, 2015). Further model analyses suggested that higher nutrient advection of the NSCS during the late winter was caused by mesoscale eddies, due to the energetic cyclonic gyre in the NSCS with active eddy activities.…”

Section: Discussionsupporting

confidence: 92%

“…The intrusion of the upstream low‐nutrient Kuroshio waters into the SCS via the Luzon Strait can greatly affect the biological productivity of the broad area of the NSCS (Farris & Wimbush, 1996). Meanwhile, for the basin of the NSCS, seasonal variation of primary productivity is primarily modulated by vertical turbulent mixing and Ekman pumping that have caused intense nutrient fluxes into the euphotic zones (Chen et al., 2018; Li & Hansell, 2016; Li et al., 2015). The primary production of the open SCS is also subject to influences by mesoscale eddies (Xiu & Chai, 2011).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Biogeochemical Responses to Nutrient Fluxes in the Open South China Sea: A 3‐D Modeling Study

Shuai

2021

JGR Oceans

Self Cite

View full text Add to dashboard Cite

The South China Sea (SCS), one of the largest marginal seas in the world, is influenced by complex physical dynamics (such as seasonal monsoons, river discharge, mixing, upwelling, internal waves, and mesoscale eddies; e.g., Metzger, 2003). There is an energetic cyclonic gyre throughout the year in the northern SCS (NSCS), in contrast to the basin-scale cyclonic circulation during the winter but anticyclonic circulation during the summer in the southern SCS (K.-K. Liu et al., 2002). Intense phytoplankton blooms occur over the northern shelf of the SCS due to nutrient enrichments by the Pearl River discharge and the wind-driven coastal upwelling during the summer (e.g.,

show abstract

Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Biogeochemical Responses to Nutrient Fluxes in the Open South China Sea: A 3‐D Modeling Study

Shuai

2021

JGR Oceans

Self Cite

View full text Add to dashboard Cite

show abstract

“…Particulate organic carbon flux attenuation in the ocean interior is used to constrain the biological pump efficiency at a depth, i.e., the ratio of POC flux at each specific depth in the mesopelagic zone to that at the euphotic zone base (Martin et al, 1987;Buesseler et al, 2007;Chen et al, 2018). In this study, flux attenuation was used to express the variability of local biogenic POC (excluding soot and sediment-derived autochthonous POC) flux with depth in the study area.…”

Section: Application Of 210 Po-soot Coupling To Constrain Particulate Organic Carbon Export Fluxmentioning

confidence: 99%

Utilization of Soot and 210 Po-210 Pb Disequilibria to Constrain Particulate Organic Carbon Fluxes in the Northeastern South China Sea

et al. 2021

View full text Add to dashboard Cite

Black carbon (BC) is believed to be refractory and thus affects the timescale of organic carbon conversion into CO2 and the magnitude of the sink of CO2. However, the fate of BC in the oceans remains poorly understood. Here, 210Po and 210Pb were measured to examine the export of soot in the northeastern South China Sea (SCS). Concentrations of soot decreased from 0.141 ± 0.021 μmol-C L–1 (mean ± SD) in the mixed layer (0–30 m) to 0.087 μmol-C L–1 at the euphotic base (150 m) due to potential photodegradation within the euphotic zone. In the twilight zone, however, the soot showed an increasing pattern along with the total particulate matter and total particulate organic carbon (POC) contents, corresponding to additions from the shelf/slope sediment resuspension through lateral transport. Using the deficits of 210Po, the export flux of soot from the euphotic zone was calculated to be 0.172 ± 0.016 mmol-C m–2 d–1 and increased with depth. Assuming that the soot is entirely refractory below the euphotic zone, the sediment-derived soot fluxes were estimated based on the increase in soot fluxes relative to the base of the euphotic zone, with values varying from 0.149 ± 0.030 to 0.96 ± 0.10 μmol-C L–1. This indicates that sediment resuspension is an important source of soot to the ocean interior in the SCS. Coupling the sediment-derived soot and 210Po-derived POC fluxes gave rise to a Martin Curve-like flux attenuation of local euphotic zone-derived POC in the twilight zone with b value of 0.70 ± 0.01. These results suggest that soot could be useful for constraining in situ POC fluxes and their transport.

show abstract

“…A similar 1-D model approach was applied to explore the biophysical mechanism for the temporal change in the export production of the northwestern SCS (Y. Chen et al, 2018). However, since most 1-D models applied to the SCS omitted AD-N (Lu et al, 2017), the effects of AD-N on the regional planktonic dynamics have not been quantitatively verified yet.…”

mentioning

confidence: 99%

The Effects of Atmospheric Nitrogen Deposition on the Marine Ecosystem of the Northern South China Sea

Lai

et al. 2023

JGR Oceans

View full text Add to dashboard Cite

The rapid economic developments in countries surrounding the South China Sea have caused a significant increase in the atmospheric deposition of nitrogen (AD‐N) into the ocean. The impact of AD‐N on the regional ecosystem has not been quantitatively assessed, and its driving mechanism has not been explored, either. Here, we applied a one‐dimensional European Regional Seas Ecosystem Model to examine the responses of the ecosystem to AD‐N. The physical‐biological coupled model reproduced the seasonal and interannual variabilities of observed nutrients, chlorophyll a, phytoplankton community structure, and particulate organic carbon (POC) exports at the South East Asia Time‐series Station. Seasonally, the increase of POC flux by AD‐N was most significant in winter, with a ∼2‐month lag behind the associated surface response. It can exist in the following spring, as supported by the larger population size of zooplankton after the previous winter's feeding up. Notably, the ratio of POC export to primary production varied seasonally and interannually, which was controlled by the phytoplankton and zooplankton's size compositions. The surface nutrient input thus caused a significant seasonal change in the biological carbon pump efficiency. Interannually, the modulation of the POC flux by AD‐N was inversely phase‐locked with wind variations. The out‐of‐phase of the surface‐ and subsurface‐nutrient‐driven POC fluxes suggested a potentially more considerable contribution of AD‐N to the total carbon export during years under the weak subsurface influence. This study highlights the importance of AD‐N in the regional ecosystem, which needs a better representation in the present biogeochemical modeling framework.

show abstract

Temporal Change of Export Production at Xisha of the Northern South China Sea

Cited by 10 publications

References 45 publications

Biogeochemical Responses to Nutrient Fluxes in the Open South China Sea: A 3‐D Modeling Study

Biogeochemical Responses to Nutrient Fluxes in the Open South China Sea: A 3‐D Modeling Study

Utilization of Soot and 210 Po-210 Pb Disequilibria to Constrain Particulate Organic Carbon Fluxes in the Northeastern South China Sea

The Effects of Atmospheric Nitrogen Deposition on the Marine Ecosystem of the Northern South China Sea

Contact Info

Product

Resources

About