A weak cold eddy influencing nitrogen form in the western part of the South China Sea

Mei-Lin Wu; You-Shao Wang; Yu-Tu Wang; Fu-Lin Sun; Xiaomei Li; Ji-Dong Gu

doi:10.1016/j.rsma.2022.102521

A weak cold eddy influencing nitrogen form in the western part of the South China Sea

Mei-Lin Wu^*, You-Shao Wang^*, Yu-Tu Wang, Fu-Lin Sun, Xiaomei Li, Ji-Dong Gu

^*Corresponding author for this work

Environmental Science and Engineering

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Nitrogen is an essential element for all life and it exhibits in three major dissolved inorganic chemical forms to participate in the marine nitrogen cycling. In this study, a transect through the weak cold eddy was undertaken near Xisha Islands of the South China Sea (SCS) in summer of 2009. There was a trend of decreased temperature inside the eddy, while PO4 and NO3 increased in comparison to outside the eddy The primary nitrite maximum (PNM) was found in the depth of about 50 m in the in-situ samples. Phytoplankton excretion has advantage of PNM formation and maintenance in the euphotic layer. Additionally, nitrate anomaly (N*) were positive, which implies that nitrogen fixation occurs in the surface water in the studying period. These results indicate that cold eddy has influence on regulating inorganic nitrogen biogeochemistry in the studying area during sampling period.

Original language	English
Journal	Regional Studies in Marine Science
Volume	55
DOIs	https://doi.org/10.1016/j.rsma.2022.102521
State	Published - 1 Sep 2022

Keywords

Xisha Islands
South China Sea (SCS)
Biogeochemistry
Primary nitrite maximum (PNM)
Nitrogen fixation

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.rsma.2022.102521

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title = "A weak cold eddy influencing nitrogen form in the western part of the South China Sea",

abstract = "Nitrogen is an essential element for all life and it exhibits in three major dissolved inorganic chemical forms to participate in the marine nitrogen cycling. In this study, a transect through the weak cold eddy was undertaken near Xisha Islands of the South China Sea (SCS) in summer of 2009. There was a trend of decreased temperature inside the eddy, while PO4 and NO3 increased in comparison to outside the eddy The primary nitrite maximum (PNM) was found in the depth of about 50 m in the in-situ samples. Phytoplankton excretion has advantage of PNM formation and maintenance in the euphotic layer. Additionally, nitrate anomaly (N*) were positive, which implies that nitrogen fixation occurs in the surface water in the studying period. These results indicate that cold eddy has influence on regulating inorganic nitrogen biogeochemistry in the studying area during sampling period.",

keywords = "Xisha Islands, South China Sea (SCS), Biogeochemistry, Primary nitrite maximum (PNM), Nitrogen fixation",

author = "Mei-Lin Wu and You-Shao Wang and Yu-Tu Wang and Fu-Lin Sun and Xiaomei Li and Ji-Dong Gu",

year = "2022",

month = sep,

day = "1",

doi = "10.1016/j.rsma.2022.102521",

language = "英语",

volume = "55",

journal = "Regional Studies in Marine Science",

issn = "2352-4855",

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TY - JOUR

T1 - A weak cold eddy influencing nitrogen form in the western part of the South China Sea

AU - Wu, Mei-Lin

AU - Wang, You-Shao

AU - Wang, Yu-Tu

AU - Sun, Fu-Lin

AU - Li, Xiaomei

AU - Gu, Ji-Dong

PY - 2022/9/1

Y1 - 2022/9/1

N2 - Nitrogen is an essential element for all life and it exhibits in three major dissolved inorganic chemical forms to participate in the marine nitrogen cycling. In this study, a transect through the weak cold eddy was undertaken near Xisha Islands of the South China Sea (SCS) in summer of 2009. There was a trend of decreased temperature inside the eddy, while PO4 and NO3 increased in comparison to outside the eddy The primary nitrite maximum (PNM) was found in the depth of about 50 m in the in-situ samples. Phytoplankton excretion has advantage of PNM formation and maintenance in the euphotic layer. Additionally, nitrate anomaly (N*) were positive, which implies that nitrogen fixation occurs in the surface water in the studying period. These results indicate that cold eddy has influence on regulating inorganic nitrogen biogeochemistry in the studying area during sampling period.

AB - Nitrogen is an essential element for all life and it exhibits in three major dissolved inorganic chemical forms to participate in the marine nitrogen cycling. In this study, a transect through the weak cold eddy was undertaken near Xisha Islands of the South China Sea (SCS) in summer of 2009. There was a trend of decreased temperature inside the eddy, while PO4 and NO3 increased in comparison to outside the eddy The primary nitrite maximum (PNM) was found in the depth of about 50 m in the in-situ samples. Phytoplankton excretion has advantage of PNM formation and maintenance in the euphotic layer. Additionally, nitrate anomaly (N*) were positive, which implies that nitrogen fixation occurs in the surface water in the studying period. These results indicate that cold eddy has influence on regulating inorganic nitrogen biogeochemistry in the studying area during sampling period.

KW - Xisha Islands

KW - South China Sea (SCS)

KW - Biogeochemistry

KW - Primary nitrite maximum (PNM)

KW - Nitrogen fixation

U2 - 10.1016/j.rsma.2022.102521

DO - 10.1016/j.rsma.2022.102521

M3 - 文章

SN - 2352-4855

VL - 55

JO - Regional Studies in Marine Science

JF - Regional Studies in Marine Science

ER -

A weak cold eddy influencing nitrogen form in the western part of the South China Sea

Abstract

Keywords

UN SDGs

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