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Ocean Science An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/os-2016-43
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
28 Jun 2016
Operational Assimilation of glider temperature and salinity in a mesoscale flow field: Eastern Mediterranean test case
Daniel R. Hayes1, Srdjan Dobricic2, and Hezi Gildor3 1Oceanography Center, University of Cyprus, 1678 Nicosia, Cyprus
2Centro Euro-Mediterraneo sui Cambiamenti Climatici, Bologna, Italy
3The Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
Abstract. An operational data assimilation system for the Eastern Mediterranean is described and evaluated for a 6-month twin experiment. In the assimilative run, glider profiles of temperature and salinity are assimilated daily into a high resolution ocean forecast, after an initial spin up of one week. In the control run, the same initial and boundary conditions are used to produce an operational forecast, but without assimilation of in situ data. While both runs were similar for most of the time and most of the domain, significant differences were found near the region of assimilation, particularly when the glider passed through the anticyclonic Cyprus eddy. Root mean square differences of the misfits between the temperature and salinity observations and the model background field at those locations (before any assimilation) were approximately 15% lower in the assimilative run. Improvements in the forecasting capability of surface currents were found, and would provide a significant improvement of predictive capacity for applications such as pollutant spreading or offshore operational safety.
The discussion paper was formally withdrawn.


Citation: Hayes, D. R., Dobricic, S., and Gildor, H.: Operational Assimilation of glider temperature and salinity in a mesoscale flow field: Eastern Mediterranean test case, Ocean Sci. Discuss., https://doi.org/10.5194/os-2016-43, 2016.
Daniel R. Hayes et al.
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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RC1: 'Referee comments', Nils van Velzen, 15 Jul 2016 Printer-friendly Version 
 
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Daniel R. Hayes et al.

Data sets

Physical oceanography from Seaglider mission CNCY201114910
Hayes, Daniel
https://doi.org/10.1594/PANGAEA.859003
Daniel R. Hayes et al.

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Short summary
This research has shown that it is possible to estimate ocean currents more accurately when using autonomous underwater glider observations of ocean temperature and salinity in conjunction with numerical ocean current models. This allows offshore activities to be more safely carried out, since currents can transport pollutants or disrupt operations in unpredictable ways. Using only models is not as reliable as using a merged result of observations and models, which can be done in near real time.
This research has shown that it is possible to estimate ocean currents more accurately when...
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