Article| Any: | 2017 |
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| Autor(s): | Antonio Sánchez-Román, Simón Ruiz, Ananda Pascual, Baptiste Mourre, Stéphanie Guinehut |
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| Títol: | On the mesoscale monitoring capability of Argo floats in the Mediterranean Sea |
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| Revista: | Ocean Science |
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| ISSN: | 1812-0784 |
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| Volum: | 2017 |
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| Número: | 13 |
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| Pàgines: | 223-234 |
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| D.O.I.: | 10.5194/os-13-223-2017 |
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| Web: | http://www.ocean-sci.net/13/223/2017/ |
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| Resum: | In this work a simplified observing system
simulation experiment (OSSE) approach is used to investigate which Argo
design sampling in the Mediterranean Sea would be necessary to properly
capture the mesoscale dynamics in this basin. The monitoring of the
mesoscale features is not an initial objective of the Argo network.
However, it is an interesting question from the perspective of future
network extensions in order to improve the ocean state estimates. The
true field used to conduct the OSSEs is provided by a specific
altimetry-gridded merged product for the Mediterranean Sea. Synthetic
observations were obtained by sub-sampling this Nature Run
according to different configurations of the ARGO network. The
observation errors required to perform the OSSEs were obtained through
the comparison of sea level anomalies (SLAs) from altimetry and dynamic
height anomalies (DHAs) computed from the real in situ Argo network.
This analysis also contributes to validate satellite SLAs with an
increased confidence. The simulation experiments show that a
configuration similar to the current Argo array in the Mediterranean
(with a spatial resolution of 2° × 2°) is only able to recover the
large-scale signals of the basin. Increasing the spatial resolution to
nearly 75 km × 75 km, allows the capture of most of the mesoscale
signal in the basin and to retrieve the SLA field with a RMSE of 3 cm
for spatial scales larger than 150 km, similar to those presently
captured by the altimetry. This would represent a theoretical reduction
of 40 % of the actual RMSE. Such a high-resolution Argo array composed
of around 450 floats, cycling every 10 days, is expected to increase the
actual network cost by approximately a factor of 6. |
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Personal relacionatAnanda Pascual AscasoSimón Ruiz ValeroBaptiste MourreAntonio Jesus Sanchez RomanProjectes relacionatsE-AIMS CTA 138SEALEVEL CTA 138.2Grups de recerca relacionatsTecnologies Marines, Oceanografia Operacional y Costera
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