Requirements for an Integrated in situ Atlantic Ocean Observing System From Coordinated Observing System Simulation Experiments

Type Article
Date 2019-03
Language English
Author(s) Gasparin Florent1, Guinehut Stephanie2, Mao Chongyuan3, Mirouze Isabelle4, 5, Rémy Elisabeth1, King Robert R.3, Hamon Mathieu1, Reid Rebecca3, Storto Andrea4, 6, Le Traon Pierre-Yves1, 7, Martin Matthew J.3, Masina Simona4
Affiliation(s) 1 : Mercator Océan International, Ramonville-Saint-Agne, France
2 : Collecte Localisation Satellites (CLS), Ramonville-Saint-Agne, France
3 : Met Office, Exeter, United Kingdom
4 : Fondazione Centro Euro-Mediterraneo sui Cambiamenti Climatici (CMCC), Bologna, Italy
5 : Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique, Toulouse, France
6 : NATO Centre for Maritime Research and Experimentation, La Spezia, Italy
7 : Institut Français de Recherche pour l’Exploitation de la Mer (Ifremer), Plouzané, France
Source Frontiers In Marine Science (2296-7745) (Frontiers Media SA), 2019-03 , Vol. 6 , N. 83 , P. 14p.
DOI 10.3389/fmars.2019.00083
WOS© Times Cited 18
Keyword(s) observing system simulation experiment, H2020 AtlantOS project, Argo float, deep observations, drifter, global monitoring and forecasting systems
Abstract

A coordinated effort, based on observing system simulation experiments (OSSEs), has been carried out by four European ocean forecasting centers for the first time, in order to provide insights on the present and future design of the in situ Atlantic Ocean observing system from a monitoring and forecasting perspective. This multi-system approach is based on assimilating synthetic data sets, obtained by sub-sampling in space and time using an eddy-resolving unconstrained simulation, named the Nature Run. To assess the ability of a given Atlantic Ocean observing system to constrain the ocean model state, a set of assimilating experiments were performed using four global eddy-permitting systems. For each set of experiments, different designs of the in situ observing system were assimilated, such as implementing a global drifter array equipped with a thermistor chain down to 150 m depth or extending a part of the global Argo array in the deep ocean. While results from the four systems show similarities and differences, the comparison of the experiments with the Nature Run, generally demonstrates a positive impact of the different extra observation networks on the temperature and salinity fields. The spread of the multi-system simulations, combined with the sensitivity of each system to the evaluated observing networks, allowed us to discuss the robustness of the results and their dependence on the specific analysis system. By helping define and test future observing systems from an integrated observing system view, the present work is an initial step toward better-coordinated initiatives supporting the evolution of the ocean observing system and its integration within ocean monitoring and forecasting systems.

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Gasparin Florent, Guinehut Stephanie, Mao Chongyuan, Mirouze Isabelle, Rémy Elisabeth, King Robert R., Hamon Mathieu, Reid Rebecca, Storto Andrea, Le Traon Pierre-Yves, Martin Matthew J., Masina Simona (2019). Requirements for an Integrated in situ Atlantic Ocean Observing System From Coordinated Observing System Simulation Experiments. Frontiers In Marine Science, 6(83), 14p. Publisher's official version : https://doi.org/10.3389/fmars.2019.00083 , Open Access version : https://archimer.ifremer.fr/doc/00485/59623/