Preprints
https://doi.org/10.5194/egusphere-2023-2107
https://doi.org/10.5194/egusphere-2023-2107
18 Sep 2023
 | 18 Sep 2023
Status: this preprint has been withdrawn by the authors.

The salinity anomalies due to the biogeochemical processes in the Bohai Sea

Fengying Ji and Xunjun Xiong

Abstract. Salinity has been classed as an 'Essential Climate Variable' by the Global Observing System for Climate since 2010 and its compatibility must be ensured to avoid spurious trends and discontinuities. Because of the lack of measurements, it is not well known that small variations in the relative dissolved constituents of coastal and semi-enclosed seawater result in changes in the Absolute Salinity SA which is the salinity parameter of the International Thermodynamic Equation of Seawater – 2010 (TEOS-10 for short), and the changes in the Practical Salinity SP that it results in, which is still served as the simplicity of Absolute Salinity in many studies, are even less well known. To clarify the salinities compatibility level in the semi-enclosed Bohai Sea, we analyzed the repeat in-situ measurements along the section from 1985 to 2020 and the near-synchronous field data from 2006 to 2007 in this sea, found the main relative composition anomalies are dominated by additional HCO3and Ca2+ which mainly originate from the suspension and redissolution of bottom sediments. They can increase the SA by a maximum of 0.1 g·kg−1 and raise the SP of 0~0.04 PSS-78 according to the TEOS-10 algorithm and the mathematical model Pa08. Moreover, we parameterized the δSA and δSP with their uncertainties with/without considering relative composition variations in the Bohai Sea respectively. All the results may provide a reference for salinity research in semi-closed oceans.

This preprint has been withdrawn.

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Fengying Ji and Xunjun Xiong

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-2107', Anonymous Referee #1, 11 Oct 2023
    • AC1: 'Reply on RC1', fengying Ji, 17 Oct 2023
  • RC2: 'Comment on egusphere-2023-2107', Anonymous Referee #2, 17 Oct 2023
    • AC2: 'Reply on RC2', fengying Ji, 18 Oct 2023
  • EC1: 'Comment on egusphere-2023-2107', Xinping Hu, 14 Nov 2023
    • AC3: 'Reply on EC1', fengying Ji, 15 Nov 2023

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-2107', Anonymous Referee #1, 11 Oct 2023
    • AC1: 'Reply on RC1', fengying Ji, 17 Oct 2023
  • RC2: 'Comment on egusphere-2023-2107', Anonymous Referee #2, 17 Oct 2023
    • AC2: 'Reply on RC2', fengying Ji, 18 Oct 2023
  • EC1: 'Comment on egusphere-2023-2107', Xinping Hu, 14 Nov 2023
    • AC3: 'Reply on EC1', fengying Ji, 15 Nov 2023
Fengying Ji and Xunjun Xiong
Fengying Ji and Xunjun Xiong

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This preprint has been withdrawn.

Short summary
Salinity has been classed as an 'Essential Climate Variable' by the Global Observing System for Climate since 2010 and its compatibility must be ensured to avoid spurious trends and discontinuities. This manuscript accurately characterize the salinity changes based on a long time series of measurements and to specify the compatibility level of long-term salinity change of the Bohai Sea with/without consideration of relative composition variations.