Seasonal variability and dynamics of coastal sea surface temperature fronts in the East China Sea

Lu, Chun-Lin; Tang, Rui; Huang, Wei; Wang, Yuntao

doi:10.1007/s10236-020-01427-8

Cited by 25 publications

(19 citation statements)

References 58 publications

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“…There was offshore migration of the Zhejiang-Fujian front to the ECS mid-shelf in spring (Figure 12B). This is consistent with the recent discovery by Cao et al (2021) that front activities were enhanced from February to May in this region. It has been demonstrated that the Kuroshio SST front intensity is the strongest from March to April.…”

Section: Process Beyond the Stratification Control Modelsupporting

confidence: 93%

Unraveling environmental drivers of chlorophyll seasonal and interannual variability in the East China Sea

Xiu

et al. 2022

Front. Mar. Sci.

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Phytoplankton, the dominant marine primary producers, are considered highly sensitive indicators of ecosystem conditions and changes. The East China Sea (ECS) includes a variety of oceanic and coastal domains that collectively challenge our understanding of phytoplankton dynamics and controls. This study evaluates the seasonal and interannual variability of phytoplankton in the ECS and the underlying environmental determinants based on 22-year satellite chlorophyll (Chl-a) data and concurrent environmental variables. A seasonal spring bloom was found in the ECS, classically driven by increased stratification, which is associated with increases in sea surface temperature (SST), photosynthetically available radiation (PAR), net heat flux (NHF), and reduced wind mixing. The most significant Chl-a interannual variability was present in a triangular area surrounded by three SST fronts in the southern ECS during springtime. Anomalously high Chl-a (~30% increase) occurred with increased SST and NHF and enhanced wind mixing during negative Pacific Decadal Oscillation (PDO) and El Niño–Southern Oscillation (ENSO) modes. This seems to be contrary to the stratification control model, which fits the seasonal spring bloom observed in this region. More front activities during the negative PDO and ENSO could be associated with Chl-a increase in this triangular area. Contrary to this mixing control scenario, a significant Chl-a increase (~36% increase) also developed during the positive PDO and ENSO modes after 2014 under conditions of higher SST, NHF, and weaker wind mixing following the stratification control scenario. This study used biologically relevant objective regionalization of a heterogeneous area to elucidate phytoplankton bloom dynamics and controls. Our analyses highlight the triangular area in the ECS for its region-specific linkages between Chl-a and multiple climate-sensitive environmental drivers, as well as the potential structural and functional variability in this region.

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Section: Process Beyond the Stratification Control Modelsupporting

confidence: 93%

Unraveling environmental drivers of chlorophyll seasonal and interannual variability in the East China Sea

Xiu

et al. 2022

Front. Mar. Sci.

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“…As described in Castelao and Wang (2014), some topographic features can prevent the offshore extension of fronts, resulting in a narrow frontal zone even though wind forcing is strong, while some other topographic features can deflect fronts offshore, causing a wide frontal zone around topographic perturbations even though the wind forcing is spatially uniform. Cao et al (2021) reported that a recurring coastal thermal front in the ECS aligns well with the maximum bathymetric gradient zone. Similarly, strong frontal activity in the southeastern continental shelf of Brazil is closely associated with the 200-m isobath (Chen et al, 2019).…”

Section: Driving Mechanismsmentioning

confidence: 88%

Ocean Temperature and Color Frontal Zones in the Gulf of Mexico: Where, When, and Why

Zhang

2021

JGR Oceans

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“…The numbers of macrobenthic species, and their total abundance and biomass in the frontal area were higher than adjacent area. Owen (1981); Bakun (2006); Cao et al (2021) pointed out that owing to frontogenesis of the fronts and eddies in coastal oceans, the nutrient input into the coastal and bay aera seasonally and induced higher production of food organisms (such as phytoplankton and zooplankton), which had a stronger influence on the macrobenthos diversity, abundance and assemblage structure.…”

Section: Effects Of the Secondary Front On Macrobenthos Communities I...mentioning

confidence: 99%

Spatial and temporal distribution of macrobenthos communities and their relationship with secondary front in Hangzhou Bay

Jia

Tang²,

Liu³

et al. 2022

Front. Mar. Sci.

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Water quality in Hangzhou Bay is inferior (grade 5) because of discharged from Yangtze River and Qiantang River, and from factories around the bay. This study analyzed relationships between the environment and macrobenthic communities at 44 stations throughout Hangzhou Bay, based on samples collected in 2006, from 2016–2018, and in 2021. Long-term spatial and temporal changed in macrobenthos, and the influence of secondary water fronts on community composition, were discussed. Macrobenthos in Qiantang River Estuary was numerically, primarily dominated by crustaceans, and elsewhere by polychaetes. Species that differ most in abundance between four identified regions in the bay were the amphipod Corophium sinensis, clam Potamocorbula laevis, and polychaete Amaeana occidentalis. The abundance and biomass of macrobenthos in different regions differs significantly. Taxa were allocated to six feeding guilds: filter feeders and omnivores predominate in Qiantang River Estuary and south of Hangzhou Bay, while surface and subsurface deposit feeders predominate in sediments north of Hangzhou Bay and in the bay mouth area. Negative correlations were apparent between the abundances of polychaetes Nephtys polybranchia, Magelona japonica, Heterospio sinica, Sabella sp. and A. occidentalis and salinity and pH, while positive correlations were apparent between those of Sternaspis chinensis and Capitellidae indet. Fine-grained fraction (silt and clay) and mid-salinity were more suitable for macrobenthos. The numbers and biomasses of macrobenthic species in the Hangzhou Bay frontal area increased significantly relative to values in adjacent areas. The difference of each area near the front was more than 94%, and the main difference species were polychaetes and mollusks. Our baseline data for this region might ultimately contribute towards improved conservation of regional macrobenthos, and a better understanding of ecosystem health in this highly polluted bay.

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Seasonal variability and dynamics of coastal sea surface temperature fronts in the East China Sea

Cited by 25 publications

References 58 publications

Unraveling environmental drivers of chlorophyll seasonal and interannual variability in the East China Sea

Unraveling environmental drivers of chlorophyll seasonal and interannual variability in the East China Sea

Ocean Temperature and Color Frontal Zones in the Gulf of Mexico: Where, When, and Why

Spatial and temporal distribution of macrobenthos communities and their relationship with secondary front in Hangzhou Bay

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