Combining Argo profiles with a general circulation model in the North Atlantic. Part 1: Estimation of hydrographic and circulation anomalies from synthetic profiles, over a year
International audience Argo is a global array of profiling floats that provides temperature (T) and salinity (S) profiles from 2000 m to the surface every ten days with a nominal spatial resolution of 3°. Here we present idealized experiments where the adjoint method is used to synthesize simulated...
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ftunivnantes:oai:HAL:hal-00267345v1 2023-05-15T17:30:39+02:00 Combining Argo profiles with a general circulation model in the North Atlantic. Part 1: Estimation of hydrographic and circulation anomalies from synthetic profiles, over a year Forget, Gaël Ferron, Bruno Mercier, Herlé Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2008 https://hal.science/hal-00267345 https://doi.org/10.1016/j.ocemod.2007.06.001 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ocemod.2007.06.001 hal-00267345 https://hal.science/hal-00267345 doi:10.1016/j.ocemod.2007.06.001 ISSN: 1463-5003 Ocean Modelling https://hal.science/hal-00267345 Ocean Modelling, 2008, 20 (1), pp.1-16. ⟨10.1016/j.ocemod.2007.06.001⟩ Data assimilation 4DVAR Twin experiment Argo General circulation model [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2008 ftunivnantes https://doi.org/10.1016/j.ocemod.2007.06.001 2023-02-08T06:22:06Z International audience Argo is a global array of profiling floats that provides temperature (T) and salinity (S) profiles from 2000 m to the surface every ten days with a nominal spatial resolution of 3°. Here we present idealized experiments where the adjoint method is used to synthesize simulated sets of Argo profiles with a general circulation model, over a one-year period, in the North Atlantic. Using a number of drifting profilers consistent with Argo deployment objectives, the simulated array permits one to identify large-scale anomalies in the hydrography and circulation, despite the presence of a simulated eddy noise of large amplitude. Model dynamics provide an objective means to distinguish eddy noise from large-scale oceanic variability, and to infer the absolute velocity field (including abyssal velocities and sea surface height) from sets of Argo profiles of T and S. In particular, our idealized experiments suggest that volume and heat transports can be efficiently constrained by sets of Argo profiles. Increasing the number of Argo floats seems to be an adequate strategy to further reduce errors in circulation estimates. Article in Journal/Newspaper North Atlantic Université de Nantes: HAL-UNIV-NANTES Ocean Modelling 20 1 1 16 |
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Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Data assimilation 4DVAR Twin experiment Argo General circulation model [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Data assimilation 4DVAR Twin experiment Argo General circulation model [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Forget, Gaël Ferron, Bruno Mercier, Herlé Combining Argo profiles with a general circulation model in the North Atlantic. Part 1: Estimation of hydrographic and circulation anomalies from synthetic profiles, over a year |
topic_facet |
Data assimilation 4DVAR Twin experiment Argo General circulation model [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Argo is a global array of profiling floats that provides temperature (T) and salinity (S) profiles from 2000 m to the surface every ten days with a nominal spatial resolution of 3°. Here we present idealized experiments where the adjoint method is used to synthesize simulated sets of Argo profiles with a general circulation model, over a one-year period, in the North Atlantic. Using a number of drifting profilers consistent with Argo deployment objectives, the simulated array permits one to identify large-scale anomalies in the hydrography and circulation, despite the presence of a simulated eddy noise of large amplitude. Model dynamics provide an objective means to distinguish eddy noise from large-scale oceanic variability, and to infer the absolute velocity field (including abyssal velocities and sea surface height) from sets of Argo profiles of T and S. In particular, our idealized experiments suggest that volume and heat transports can be efficiently constrained by sets of Argo profiles. Increasing the number of Argo floats seems to be an adequate strategy to further reduce errors in circulation estimates. |
author2 |
Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Forget, Gaël Ferron, Bruno Mercier, Herlé |
author_facet |
Forget, Gaël Ferron, Bruno Mercier, Herlé |
author_sort |
Forget, Gaël |
title |
Combining Argo profiles with a general circulation model in the North Atlantic. Part 1: Estimation of hydrographic and circulation anomalies from synthetic profiles, over a year |
title_short |
Combining Argo profiles with a general circulation model in the North Atlantic. Part 1: Estimation of hydrographic and circulation anomalies from synthetic profiles, over a year |
title_full |
Combining Argo profiles with a general circulation model in the North Atlantic. Part 1: Estimation of hydrographic and circulation anomalies from synthetic profiles, over a year |
title_fullStr |
Combining Argo profiles with a general circulation model in the North Atlantic. Part 1: Estimation of hydrographic and circulation anomalies from synthetic profiles, over a year |
title_full_unstemmed |
Combining Argo profiles with a general circulation model in the North Atlantic. Part 1: Estimation of hydrographic and circulation anomalies from synthetic profiles, over a year |
title_sort |
combining argo profiles with a general circulation model in the north atlantic. part 1: estimation of hydrographic and circulation anomalies from synthetic profiles, over a year |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/hal-00267345 https://doi.org/10.1016/j.ocemod.2007.06.001 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 1463-5003 Ocean Modelling https://hal.science/hal-00267345 Ocean Modelling, 2008, 20 (1), pp.1-16. ⟨10.1016/j.ocemod.2007.06.001⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ocemod.2007.06.001 hal-00267345 https://hal.science/hal-00267345 doi:10.1016/j.ocemod.2007.06.001 |
op_doi |
https://doi.org/10.1016/j.ocemod.2007.06.001 |
container_title |
Ocean Modelling |
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20 |
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1 |
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1 |
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16 |
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1766127510774349824 |