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https://doi.org/10.5194/essd-2020-197
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-2020-197
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  11 Aug 2020

11 Aug 2020

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A revised version of this preprint was accepted for the journal ESSD and is expected to appear here in due course.

Global dataset of thermohaline staircases obtained from Argo floats and Ice Tethered Profilers

Carine G. van der Boog1, J. Otto Koetsier1, Henk A. Dijkstra2, Julie D. Pietrzak1, and Caroline A. Katsman1 Carine G. van der Boog et al.
  • 1Environmental Fluid Mechanics, Civil Engineering and Geosciences, Delft University of Technology, Delft, the Netherlands
  • 2Institute for Marine and Atmospheric research Utrecht, Utrecht University, Utrecht, the Netherlands

Abstract. Thermohaline staircases arise from double diffusive processes. They are characterised by stepped structures consisting of mixed layers of typically tens of meters thick that are separated by much thinner gradient layers. Through these gradient layers enhanced diapycnal salt and heat transport take place. In this study, we present a global dataset of thermohaline staircases derived from observations of Argo profiling floats and Ice Tethered Profilers using a novel detection algorithm. To establish the presence of stepped thermohaline staircases, the algorithm detects subsurface mixed layers and analyses the gradient layers in between. Of each detected staircase, the temperature, salinity, depth and height, as well as some other properties of the mixed layers and gradient layers are computed. The algorithm is applied to 487,647 quality-controlled temperature and salinity profiles to obtain the global dataset. The performance of the algorithm is verified through an analysis of independent regional observations. The algorithm and global dataset are available at the 4TU centre for research data (van der Boog et al. 10 (2020), doi: https://doi.org/10.4121/uuid:f6529d31-b285-46ac-990b-5f45839f4e11).

Carine G. van der Boog et al.

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Carine G. van der Boog et al.

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lobal dataset of thermohaline staircases obtainedfrom Argo floats and Ice Tethered Profile C. G. van der Boog, J. O. Koetsier, H. A. Dijkstra, J. D. Pietrzak, and C. A. Katsman https://doi.org/10.4121/uuid:f6529d31-b285-46ac-990b-5f45839f4e11

Carine G. van der Boog et al.

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Short summary
Thermohaline staircases are stepped structures in the ocean that contain enhanced diapycnal salt and heat transport. In this study, we present a global dataset of thermohaline staircases derived from 487,647 observations of Argo profiling floats and Ice Tethered Profilers using a novel detection algorithm.
Thermohaline staircases are stepped structures in the ocean that contain enhanced diapycnal salt...
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