Gradually Cooling of the Yellow Sea Warm Current Driven by Tropical Pacific Subsurface Water Temperature Changes Over the Past 5 kyr

Li, Dawei; Yu, Meng; Jia, Yonghao; Steinke, Stephan; Li, Li; Xiang, Rong; Zhao, Meixun

doi:10.1029/2021gl093534

Cited by 4 publications

(2 citation statements)

References 64 publications

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“…The southern YS, locates between the mainland China and the Korean peninsula, is a semi-enclosed marginal sea with an average water depth of ∼44 m (Li et al, 2021; Figure 1). The major surface currents in the southern YS are the Yellow Sea Warm Current (YSWC) and coastal currents, i.e., the Korean Coastal Current (KCC) along the Korean Peninsula and the Yellow Sea Coastal Current (YSCC) along the Shandong Peninsula and the Jiangsu coast (Zang et al, 2003), prevailing in winter and spring seasons (Liu et al, 2013; Figure 1).…”

Section: Study Area and Sediment Corementioning

confidence: 99%

“…The major surface currents in the southern YS are the Yellow Sea Warm Current (YSWC) and coastal currents, i.e., the Korean Coastal Current (KCC) along the Korean Peninsula and the Yellow Sea Coastal Current (YSCC) along the Shandong Peninsula and the Jiangsu coast (Zang et al, 2003), prevailing in winter and spring seasons (Liu et al, 2013; Figure 1). Strong northwest wind drives the KCC and YSCC flow southward (Beardsley et al, 1983); to compensate the coastal current transport, the northward warm current, i.e., the YSWC, flows along the western slope of the south YS trough (Lin et al, 2011;Li et al, 2021). There are also strong tidal currents in the near shore region along the Jiangsu coast and Changjiang estuary, with the strongest tidal current speed > 150 cm s −1 (Bian et al, 2013).…”

Section: Study Area and Sediment Corementioning

confidence: 99%

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Influences of the 1855 AD Huanghe (Yellow River) Relocation on Sedimentary Organic Carbon Burial in the Southern Yellow Sea

Liu

Ding

et al. 2022

Front. Mar. Sci.

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The Huanghe (Yellow River) supplies large amount of sediments and terrestrial organic carbon (OC) to the eastern Chinese marginal seas. A relocation of the Huanghe outlet from the southern Yellow Sea (YS) to the Bohai Sea occurred in 1855 AD, however, detailed knowledge about the impact of this relocation on sedimentary source and OC burial in Chinese marginal seas is still critically lacking. In this study, we present total OC content and its isotope (δ13C), along with bulk total organic carbon (TOC)/total nitrogen (TN) molar ratio and lipid biomarker contents, in a sediment core HH12 from the southern YS with sediment age spanning the last 300 years. We find that TOC and terrestrial lipid biomarker mass accumulation rates were lower between 1855 AD and 1950 AD than that prior to 1855 AD in core HH12; and in accordance, both TOC/TN ratio and δ13C records indicate a gradual decrease of terrigenous source contributions to sedimentary OC. This suggests that the relocation of the Huanghe outlet reduced the transport of terrestrial OC to the southern YS. However, the δ13C record also indicates a relative increase of terrestrial OC contribution to sedimentary OC after 1950 AD, and the most likely explanation is increased contributions from the old Huanghe delta erosion and Korean rivers. Future studies should focus on better constraining the variations of terrestrial and marine endmembers with δ13C and Δ14C analyses of specific biomarkers to examine these linkages.

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Section: Study Area and Sediment Corementioning

confidence: 99%

Section: Study Area and Sediment Corementioning

confidence: 99%

Influences of the 1855 AD Huanghe (Yellow River) Relocation on Sedimentary Organic Carbon Burial in the Southern Yellow Sea

Liu

Ding

et al. 2022

Front. Mar. Sci.

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A Meta‐Analysis of Studies Attributing Significance to Solar Irradiance

Vachula

Cheung

2023

Earth and Space Science

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The relationship between solar irradiance and climate is greatly debated. This inferred relationship is often characterized via the statistical analysis of paleoclimate data. REDFIT is a commonly used statistical tool that overcomes uneven sampling to identify significant periodicities of variability in proxy data. We critically examine the use of REDFIT to identify solar signals in these data. By conducting a literature review, we show the REDFIT significance thresholds used by researchers to analyze paleoclimate data vary considerably. As there is some subjectivity and practicality involved in any statistical analysis, some variability is to be expected. However, we observe that the bulk of the significance thresholds used in the literature are less stringent than the critical false‐alarm level outlined by REDFIT's creators. We reexamine periodicities deemed “significant” in a published data set to show that using this more stringent, more objective critical false‐alarm threshold likely eliminates the previously inferred significance of solar signals in proxy data. Likewise, we address a lack of consideration of age model uncertainty on REDFIT's reliability in identifying solar periodicities. Overall, we show that the relationship between solar irradiance and climate, as identified by REDFIT analyses, may not be as robust as previous work might suggest.

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Impact of vertical stratification on the 2020 spring bloom in the Yellow Sea

Kim,

Lee,

Kim

et al. 2023

Sci Rep

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The Yellow Sea is one of the world’s most abundant marine resources, providing food and economic benefits to the Korean and Chinese populations. In spring 2020, a decrease in the intensity of phytoplankton bloom was observed. While one study attributed this decline to a decrease in nutrient associated with the COVID-19 pandemic, our previous research proposed weakened thermal stratification accompanied by a surface cooling anomaly as the cause. However, the relationship between the marine environment and ecosystem has not been fully elucidated. Using observations and marine physical-biogeochemical model data, we identified the weakened stratification as a critical factor for suppressing the 2020 spring bloom. Intense vertical mixing hindered the accumulation of nutrient and chlorophyll-a concentrations within the euphotic zone, resulting in a diminished phytoplankton bloom. In contrast, reduced nitrate and phosphate concentrations in 2020 were insignificant compared to those in 2017–2019, despite the notable decline in PM2.5 in March 2020 due to COVID-19. In April 2020, nutrient levels fell within the range of interannual variability based on long-term observations, reflecting a negligible effect on the spring phytoplankton bloom. Our findings provide insight into the importance of marine physical factors on the phytoplankton biomass in the Yellow Sea.

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Gradually Cooling of the Yellow Sea Warm Current Driven by Tropical Pacific Subsurface Water Temperature Changes Over the Past 5 kyr

Cited by 4 publications

References 64 publications

Influences of the 1855 AD Huanghe (Yellow River) Relocation on Sedimentary Organic Carbon Burial in the Southern Yellow Sea

Influences of the 1855 AD Huanghe (Yellow River) Relocation on Sedimentary Organic Carbon Burial in the Southern Yellow Sea

A Meta‐Analysis of Studies Attributing Significance to Solar Irradiance

Impact of vertical stratification on the 2020 spring bloom in the Yellow Sea

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