Impact of Ocean Observation Systems on Ocean Analysis and Seasonal Forecasts
International audience The relative merits of the Tropical Atmosphere-Ocean (TAO)/Triangle Trans-Ocean Buoy Network (TAO/TRITON) and Pilot Research Moored Array in the Tropical Atlantic mooring networks, the Vol- untary Observing Ship (VOS) expendable bathythermograph (XBT) network, and the Argo flo...
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ftunivrennes1hal:oai:HAL:inria-00176154v1 2024-04-21T08:07:56+00:00 Impact of Ocean Observation Systems on Ocean Analysis and Seasonal Forecasts Vidard, Arthur Anderson, David, P. Balmaseda, Magdalena Modelling, Observations, Identification for Environmental Sciences (MOISE) Inria Grenoble - Rhône-Alpes Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire Jean Kuntzmann (LJK) Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) European Centre for Medium-Range Weather Forecasts (ECMWF) 2007 https://inria.hal.science/inria-00176154 https://inria.hal.science/inria-00176154/document https://inria.hal.science/inria-00176154/file/osepaper.pdf https://doi.org/10.1175/MWR3310.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/MWR3310.1 inria-00176154 https://inria.hal.science/inria-00176154 https://inria.hal.science/inria-00176154/document https://inria.hal.science/inria-00176154/file/osepaper.pdf doi:10.1175/MWR3310.1 info:eu-repo/semantics/OpenAccess ISSN: 0027-0644 EISSN: 1520-0493 Monthly Weather Review https://inria.hal.science/inria-00176154 Monthly Weather Review, 2007, 135 (2), pp.409-429. ⟨10.1175/MWR3310.1⟩ [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] info:eu-repo/semantics/article Journal articles 2007 ftunivrennes1hal https://doi.org/10.1175/MWR3310.1 2024-04-11T00:01:25Z International audience The relative merits of the Tropical Atmosphere-Ocean (TAO)/Triangle Trans-Ocean Buoy Network (TAO/TRITON) and Pilot Research Moored Array in the Tropical Atlantic mooring networks, the Vol- untary Observing Ship (VOS) expendable bathythermograph (XBT) network, and the Argo float network are evaluated through their impact on ocean analyses and seasonal forecast skill. An ocean analysis is performed in which all available data are assimilated. In two additional experiments the moorings and the VOS datasets are withheld from the assimilation. To estimate the impact on seasonal forecast skill, the set of ocean analyses is then used to initialize a corresponding set of coupled ocean-atmosphere model fore- casts. A further set of experiments is conducted to assess the impact of the more recent Argo array. A key parameter for seasonal forecast initialization is the depth of the thermocline in the tropical Pacific. This depth is quite similar in all of the experiments that involve data assimilation, but withdrawing the TAO data has a bigger effect than withdrawing XBT data, especially in the eastern half of the basin. The forecasts mainly indicate that the TAO/TRITON in situ temperature observations are essential to obtain optimum forecast skill. They are best combined with XBT, however, because this results in better predictions for the west Pacific. Furthermore, the XBTs play an important role in the North Atlantic. The ocean data assimi- lation performs less well in the tropical Atlantic. This may be partly a result of not having adequate observations of salinity. Article in Journal/Newspaper North Atlantic Université de Rennes 1: Publications scientifiques (HAL) Monthly Weather Review 135 2 409 429 |
institution |
Open Polar |
collection |
Université de Rennes 1: Publications scientifiques (HAL) |
op_collection_id |
ftunivrennes1hal |
language |
English |
topic |
[MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] |
spellingShingle |
[MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] Vidard, Arthur Anderson, David, P. Balmaseda, Magdalena Impact of Ocean Observation Systems on Ocean Analysis and Seasonal Forecasts |
topic_facet |
[MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] |
description |
International audience The relative merits of the Tropical Atmosphere-Ocean (TAO)/Triangle Trans-Ocean Buoy Network (TAO/TRITON) and Pilot Research Moored Array in the Tropical Atlantic mooring networks, the Vol- untary Observing Ship (VOS) expendable bathythermograph (XBT) network, and the Argo float network are evaluated through their impact on ocean analyses and seasonal forecast skill. An ocean analysis is performed in which all available data are assimilated. In two additional experiments the moorings and the VOS datasets are withheld from the assimilation. To estimate the impact on seasonal forecast skill, the set of ocean analyses is then used to initialize a corresponding set of coupled ocean-atmosphere model fore- casts. A further set of experiments is conducted to assess the impact of the more recent Argo array. A key parameter for seasonal forecast initialization is the depth of the thermocline in the tropical Pacific. This depth is quite similar in all of the experiments that involve data assimilation, but withdrawing the TAO data has a bigger effect than withdrawing XBT data, especially in the eastern half of the basin. The forecasts mainly indicate that the TAO/TRITON in situ temperature observations are essential to obtain optimum forecast skill. They are best combined with XBT, however, because this results in better predictions for the west Pacific. Furthermore, the XBTs play an important role in the North Atlantic. The ocean data assimi- lation performs less well in the tropical Atlantic. This may be partly a result of not having adequate observations of salinity. |
author2 |
Modelling, Observations, Identification for Environmental Sciences (MOISE) Inria Grenoble - Rhône-Alpes Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire Jean Kuntzmann (LJK) Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) European Centre for Medium-Range Weather Forecasts (ECMWF) |
format |
Article in Journal/Newspaper |
author |
Vidard, Arthur Anderson, David, P. Balmaseda, Magdalena |
author_facet |
Vidard, Arthur Anderson, David, P. Balmaseda, Magdalena |
author_sort |
Vidard, Arthur |
title |
Impact of Ocean Observation Systems on Ocean Analysis and Seasonal Forecasts |
title_short |
Impact of Ocean Observation Systems on Ocean Analysis and Seasonal Forecasts |
title_full |
Impact of Ocean Observation Systems on Ocean Analysis and Seasonal Forecasts |
title_fullStr |
Impact of Ocean Observation Systems on Ocean Analysis and Seasonal Forecasts |
title_full_unstemmed |
Impact of Ocean Observation Systems on Ocean Analysis and Seasonal Forecasts |
title_sort |
impact of ocean observation systems on ocean analysis and seasonal forecasts |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://inria.hal.science/inria-00176154 https://inria.hal.science/inria-00176154/document https://inria.hal.science/inria-00176154/file/osepaper.pdf https://doi.org/10.1175/MWR3310.1 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0027-0644 EISSN: 1520-0493 Monthly Weather Review https://inria.hal.science/inria-00176154 Monthly Weather Review, 2007, 135 (2), pp.409-429. ⟨10.1175/MWR3310.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/MWR3310.1 inria-00176154 https://inria.hal.science/inria-00176154 https://inria.hal.science/inria-00176154/document https://inria.hal.science/inria-00176154/file/osepaper.pdf doi:10.1175/MWR3310.1 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/MWR3310.1 |
container_title |
Monthly Weather Review |
container_volume |
135 |
container_issue |
2 |
container_start_page |
409 |
op_container_end_page |
429 |
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1796948058923073536 |