14 Sep 2023
 | 14 Sep 2023
Status: this preprint is open for discussion.

Examining baseline water properties and bottom water patterns in hadal trench environments

Jessica Louise Kolbusz, Jan David Zika, Charitha Pattiaratchi, and Alan John Jamieson

Abstract. We examine baseline water properties and bottom water patterns in hadal trench environments across the Southern Ocean, Indian Ocean, and Western Pacific. Significant differences are identified in the South Fiji Basin and surrounding the Philippine Sea, primarily due to the movement of cold Lower Circumpolar Deep Water along topographic features, highlighting the importance of a trench’s geospatial position. We present the first hydrographic profiles in the Java Trench, warranting further research. Increases in salinity patterns in depths over 10,000 dbar are investigated, with potential causes including instrumentation error, internal mixing, and saline pore water expulsion. These hadopelagic variations are crucial for assessing climate change impacts, especially regarding Antarctic Bottom Water. The study underscores the importance of incorporating these adiabatic conditions for insights into ecological biodiversity, alongside the baseline conditions presented being indispensable for future oceanographic research across multiple disciplines.

Jessica Louise Kolbusz et al.

Status: open (until 09 Nov 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2023-2066', Bernadette Sloyan, 18 Sep 2023 reply
    • AC1: 'Reply on CC1', Jessica Kolbusz, 18 Sep 2023 reply
  • RC1: 'Comment on egusphere-2023-2066', Anonymous Referee #1, 30 Sep 2023 reply
  • RC2: 'Comment on egusphere-2023-2066', Anonymous Referee #2, 02 Oct 2023 reply

Jessica Louise Kolbusz et al.

Jessica Louise Kolbusz et al.


Total article views: 155 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
116 30 9 155 14 1 2
  • HTML: 116
  • PDF: 30
  • XML: 9
  • Total: 155
  • Supplement: 14
  • BibTeX: 1
  • EndNote: 2
Views and downloads (calculated since 14 Sep 2023)
Cumulative views and downloads (calculated since 14 Sep 2023)

Viewed (geographical distribution)

Total article views: 154 (including HTML, PDF, and XML) Thereof 154 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
Latest update: 03 Oct 2023
Short summary
We collected observations of the ocean environment at depths over 6000 meters in the Southern Ocean, Indian Ocean, and Western Pacific using sensor-equipped landers. We found that trench locations impact the water characteristics over these depths. Moving northward, they generally warmed but differed due to their position along bottom water circulation paths. These insights stress the importance of further research in understanding the environment of these deep regions and their importance.