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Earth System Science Data The Data Publishing Journal
https://doi.org/10.5194/essd-2018-40
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
 
03 Apr 2018
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Earth System Science Data (ESSD).
Sea surface salinity and temperature in the Southern Atlantic Ocean from South African icebreakers, 2010–2017
Giuseppe Aulicino1,2, Yuri Cotroneo2, Isabelle Ansorge3, Marcel van den Berg4, Cinzia Cesarano5, Maria Belmonte Rivas6,7, and Estrella Olmedo Casal6 1Department of Life and Environmental Sciences, Università Politecnica delle Marche, Ancona, 60131, Italy
2Department of Science and Technologies, Università degli studi di Napoli Parthenope, Napoli, 80143, Italy
3Marine Research Institute, Oceanography Department, University of Cape Town, Rondebosch, 7701, South Africa
4Department of Environmental Affairs, Cape Town, 8001, South Africa
5Progetto Terra, Gragnano, 80054, Italy
6Institute of Marine Sciences, ICM, Barcelona, 08003, Spain
7Royal Netherlands Meteorological Institute, KNMI, De Bilt, 3730, the Netherlands
Abstract. We present here sea surface salinity (SSS) and temperature (SST) data collected onboard the SA Agulhas-I and SA Agulhas-II research vessels, in the framework of the South African National Antarctic Programme (SANAP). Onboard SeaBird ThermoSalinoGraphs were regularly calibrated and continuously monitored in-between cruises, and no appreciable sensor drift emerged. Water samples were taken on a daily basis and later analysed with a Portasal salinometer; some CTD measurements collected along the cruises were used to validate the data. No systematic differences appeared after a rigorous quality control on continuous data. Results show that salinity measurement error was a few hundredths of a unit on the practical salinity scale. Quality control included several steps, among which an automatic detection of unreliable values through selected thresholds criteria and an attribution of quality flags based on multiple criteria, i.e. analysis of information included in the cruise reports, detection of insufficient flow and/or presence of air bubbles in the seawater pipe, visual inspection of individual campaigns, ex-post check of seaice maps for confirming icefields locations. This data processing led to discard about 36 % of acquired observations, while reliable data showed an excellent agreement with several independent SSS products. Nevertheless, a seaice flag has been included for indentifying valid data which could have been affected by scattered seaice contamination. In our opinion this dataset, available through an unrestricted repository at https://doi.org/10.7289/V56M3545, contributes to improve the knowledge of surface water features in one of the most important regions for global climate. That will be highly valuable for studies focusing on climate variability in the Atlantic sector of the Southern Ocean, especially across the Antarctic Circumpolar Current and its fronts. Furthermore, we expect that the collected SSS will represent a valuable tool for the calibration and validation of recent satellite observations provided by SMOS and Aquarius missions.
Citation: Aulicino, G., Cotroneo, Y., Ansorge, I., van den Berg, M., Cesarano, C., Belmonte Rivas, M., and Olmedo Casal, E.: Sea surface salinity and temperature in the Southern Atlantic Ocean from South African icebreakers, 2010–2017, Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2018-40, in review, 2018.
Giuseppe Aulicino et al.
Giuseppe Aulicino et al.

Data sets

Sea surface temperature and salinity collected aboard the S.A. AGULHAS II and S.A. AGULHAS in the South Atlantic Ocean and Southern Ocean from 2010-12-08 to 2017-02-02 G. Aulicino, Y. Cotroneo, I. Ansorge, and M. van den Berg https://doi.org/10.7289/V56M3545
Giuseppe Aulicino et al.

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Short summary
We present sea surface salinity and temperature data collected across the Atlantic sector of the Southern Ocean by thermosalinographs onboard Agulhas and Agulhas-II research vessels. After a rigorous quality control, data have been validated through comparison with water samples and independent products. Hence this dataset represents a valuable tool for validating salinity observations provided by SMOS and Aquarius missions and improving the study of climate variability over this region.
We present sea surface salinity and temperature data collected across the Atlantic sector of the...
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