Journal cover Journal topic
Ocean Science An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 2.539 IF 2.539
  • IF 5-year value: 3.129 IF 5-year
    3.129
  • CiteScore value: 2.78 CiteScore
    2.78
  • SNIP value: 1.217 SNIP 1.217
  • IPP value: 2.62 IPP 2.62
  • SJR value: 1.370 SJR 1.370
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 48 Scimago H
    index 48
  • h5-index value: 32 h5-index 32
Discussion papers
https://doi.org/10.5194/os-2019-80
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-2019-80
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 11 Jul 2019

Research article | 11 Jul 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Ocean Science (OS).

Spatio-temporal variations in High-Salinity Shelf Water production in Terra Nova Bay polynya, Antarctica

Seung-Tae Yoon1, Won Sang Lee1, Craig Stevens2,3, Stefan Jendersie4, SungHyun Nam5, Sukyoung Yun1, Chung Yeon Hwang1, Gwang Il Jang1, and Jiyeon Lee1 Seung-Tae Yoon et al.
  • 1Korea Polar Research Institute, Yeonsu-gu, Incheon 21990, Republic of Korea
  • 2National Institute of Water and Atmospheric Research, Greta Point, Wellington 6021, New Zealand
  • 3Department of Physics, University of Auckland, Auckland 1142, New Zealand
  • 4Victoria University of Wellington, Wellington 6140, New Zealand
  • 5Seoul National University, Gwanak-gu, Seoul 08826, Republic of Korea

Abstract. The formation of High-Salinity Shelf Water (HSSW), which is the major source of Antarctic bottom water (AABW), has been observed in Terra Nova Bay (TNB) in Antarctica. We believe a description of the spatio-temporal variation of salinity in TNB would help understand the production of HSSW in the region. Hence, the aim of this study is to investigate salinity variations in the Drygalski Basin (DB) and eastern TNB close to Crary Bank of the Ross Sea. For this, we use the moored and profiled hydrographic data, as well as available wind and sea-ice products. We found that deep-ocean salinity in the eastern TNB (~ 660 m) and DB (~ 1200 m) increases each year starting in September, and large amounts of salinity increase (> 0.04) were observed in 2016 and 2017. According to the velocity data observed at the same depths, the increases in salinity from September were due to the advection of HSSW from the coastal region of the Nansen ice shelf (NIS). The significant increases in salinity are related to the formation of active HSSW, evidence of which can be found from the HSSW properties obtained in February 2017 and March 2018. In addition, we show that HSSW can locally formed in the upper layer (< 300 m) of the eastern TNB by wind-driven mixing. HSSW in the upper layer was only detected in 2016 and 2017 when much saltier HSSW was observed below 800 m. This indicates that brine supply related to the development of polynya by winds has contributed to the HSSW formation not only near the NIS, but also in the eastern TNB. Moreover, as compared with historical observations, salinity of HSSW has been increasing since 2016 and, in 2018, it became similar with that in the early 2000. The observation of fluctuations such as this, which contrasts with past freshening, could contribute to estimating properties of recently formed AABW and improving the accuracy of both regional and global climate models.

Seung-Tae Yoon et al.
Interactive discussion
Status: open (until 05 Sep 2019)
Status: open (until 05 Sep 2019)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Seung-Tae Yoon et al.
Data sets

Hydrographic data in Terra Nova Bay during 2014-2018 (CTD data 2014/15) Korea Polar Research Institute (KOPRI) and National Institute of Water and Atmospheric Research (NIWA) https://doi.org/10.22663/KOPRI-KPDC-00001062.1

Hydrographic data in Terra Nova Bay during 2014-2018 (CTD data 2015/16) Korea Polar Research Institute (KOPRI) and National Institute of Water and Atmospheric Research (NIWA) https://doi.org/10.22663/KOPRI-KPDC-00000601.1

Hydrographic data in Terra Nova Bay during 2014-2018 (CTD data 2016/17) Korea Polar Research Institute (KOPRI) and National Institute of Water and Atmospheric Research (NIWA) https://doi.org/10.22663/KOPRI-KPDC-00001063.1

Hydrographic data in Terra Nova Bay during 2014-2018 (CTD data 2017/18) Korea Polar Research Institute (KOPRI) and National Institute of Water and Atmospheric Research (NIWA) https://doi.org/10.22663/KOPRI-KPDC-00000895.1

Hydrographic data in Terra Nova Bay during 2014-2018 (LADCP data 2014/15) Korea Polar Research Institute (KOPRI) and National Institute of Water and Atmospheric Research (NIWA) https://doi.org/10.22663/KOPRI-KPDC-00000895.1

Hydrographic data in Terra Nova Bay during 2014-2018 (LADCP data 2015/16) Korea Polar Research Institute (KOPRI) and National Institute of Water and Atmospheric Research (NIWA) https://doi.org/10.22663/KOPRI-KPDC-00001061.1

Hydrographic data in Terra Nova Bay during 2014-2018 (LADCP data 2016/17) Korea Polar Research Institute (KOPRI) and National Institute of Water and Atmospheric Research (NIWA) https://doi.org/10.22663/KOPRI-KPDC-00001065.1

Hydrographic data in Terra Nova Bay during 2014-2018 (LADCP data 2017/18) Korea Polar Research Institute (KOPRI) and National Institute of Water and Atmospheric Research (NIWA) https://doi.org/10.22663/KOPRI-KPDC-00000896.1

Hydrographic data in Terra Nova Bay during 2014-2018 (Mooring DITN 1st leg) Korea Polar Research Institute (KOPRI) and National Institute of Water and Atmospheric Research (NIWA) https://doi.org/10.22663/KOPRI-KPDC-00001060.1

Hydrographic data in Terra Nova Bay during 2014-2018 (Mooring DITN 2nd leg) Korea Polar Research Institute (KOPRI) and National Institute of Water and Atmospheric Research (NIWA) https://doi.org/10.22663/KOPRI-KPDC-00000749.1

Hydrographic data in Terra Nova Bay during 2014-2018 (Mooring DITN 3rd leg) Korea Polar Research Institute (KOPRI) and National Institute of Water and Atmospheric Research (NIWA) https://doi.org/10.22663/KOPRI-KPDC-00000898.1

Hydrographic data in Terra Nova Bay during 2014-2018 (Mooring DITD 3rd leg) Korea Polar Research Institute (KOPRI) and National Institute of Water and Atmospheric Research (NIWA) https://doi.org/10.22663/KOPRI-KPDC-00000906.1

Seung-Tae Yoon et al.
Viewed  
Total article views: 98 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
74 23 1 98 0 1
  • HTML: 74
  • PDF: 23
  • XML: 1
  • Total: 98
  • BibTeX: 0
  • EndNote: 1
Views and downloads (calculated since 11 Jul 2019)
Cumulative views and downloads (calculated since 11 Jul 2019)
Viewed (geographical distribution)  
Total article views: 62 (including HTML, PDF, and XML) Thereof 61 with geography defined and 1 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 19 Jul 2019
Publications Copernicus
Download
Short summary
We investigated the spatial patterns and temporal changes in High-Salinity Shelf Water (HSSW) formation in Terra Nova Bay polynya using a large, collaboratively produced data set. We show that production of HSSW can occur at the surface of the eastern Terra Nova Bay via wind-driven mixing and polynya activity, and how the nature of circulation in Terra Nova Bay influences HSSW production. The last part of this article compares the results with historical observations in Terra Nova Bay.
We investigated the spatial patterns and temporal changes in High-Salinity Shelf Water (HSSW)...
Citation