XBT Temperature Errors during French Research Cruises (1999-2007)
International audience Data from French cruises in 1999-2007, a period during which Deep Blue (DB) or T7 expendable bathythermographs (XBTs) were deployed, and for which ancillary temperature data are available in the northeast Atlantic and equatorial Atlantic regions, are examined. There was a tota...
Published in: | Journal of Atmospheric and Oceanic Technology |
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Main Authors: | , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2009
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Subjects: | |
Online Access: | https://hal.science/hal-00605941 https://hal.science/hal-00605941/document https://hal.science/hal-00605941/file/2009jtecho655_2E1.pdf https://doi.org/10.1175/2009JTECHO655.1 |
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Muséum National d'Histoire Naturelle (MNHM): HAL |
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ftmuseumnhn |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Reverdin, Gilles Marin, Frédéric Bourlès, Bernard Lherminier, Pascale XBT Temperature Errors during French Research Cruises (1999-2007) |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Data from French cruises in 1999-2007, a period during which Deep Blue (DB) or T7 expendable bathythermographs (XBTs) were deployed, and for which ancillary temperature data are available in the northeast Atlantic and equatorial Atlantic regions, are examined. There was a total of 16 cruises with XBTs launched between conductivity-temperature-depth (CTD) stations; during most of these, as well as during three additional cruises that were also considered, intake temperature was measured. XBT data from two voluntary observing ships in the North Atlantic subpolar gyre for which intake temperature was measured were also investigated. There is an XBT cold bias due to stirring of a stratified upper layer by the ship, resulting in differences between XBT temperatures at 3-5 m and intake measurements. This is most pronounced for midlatitude spring or summer cruises, when it averages about 0.10°C. When these situations are removed, the comparisons clearly indicate positive biases in XBT temperature measurements in 1999-2006, with individual cruise averages generally between 0° and 0.1°C, and a tendency to have larger biases when surface temperature is high. In addition, a positive depth-estimate bias of the XBTs in the upper thermocline (on the order of 4 m) is identified, as well as a depth overestimation through the profile, averaging 1.7% (1.2%) for the equatorial (midlatitude) cruises (with respect to a previously published depth estimate). |
author2 |
Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) 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 |
Reverdin, Gilles Marin, Frédéric Bourlès, Bernard Lherminier, Pascale |
author_facet |
Reverdin, Gilles Marin, Frédéric Bourlès, Bernard Lherminier, Pascale |
author_sort |
Reverdin, Gilles |
title |
XBT Temperature Errors during French Research Cruises (1999-2007) |
title_short |
XBT Temperature Errors during French Research Cruises (1999-2007) |
title_full |
XBT Temperature Errors during French Research Cruises (1999-2007) |
title_fullStr |
XBT Temperature Errors during French Research Cruises (1999-2007) |
title_full_unstemmed |
XBT Temperature Errors during French Research Cruises (1999-2007) |
title_sort |
xbt temperature errors during french research cruises (1999-2007) |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.science/hal-00605941 https://hal.science/hal-00605941/document https://hal.science/hal-00605941/file/2009jtecho655_2E1.pdf https://doi.org/10.1175/2009JTECHO655.1 |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_source |
ISSN: 0739-0572 EISSN: 1520-0426 Journal of Atmospheric and Oceanic Technology https://hal.science/hal-00605941 Journal of Atmospheric and Oceanic Technology, 2009, 26, pp.2462-2473. ⟨10.1175/2009JTECHO655.1⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1175/2009JTECHO655.1 hal-00605941 https://hal.science/hal-00605941 https://hal.science/hal-00605941/document https://hal.science/hal-00605941/file/2009jtecho655_2E1.pdf doi:10.1175/2009JTECHO655.1 IRD: PAR00004376 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/2009JTECHO655.1 |
container_title |
Journal of Atmospheric and Oceanic Technology |
container_volume |
26 |
container_issue |
11 |
container_start_page |
2462 |
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2473 |
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1799485192643018752 |
spelling |
ftmuseumnhn:oai:HAL:hal-00605941v1 2024-05-19T07:45:13+00:00 XBT Temperature Errors during French Research Cruises (1999-2007) Reverdin, Gilles Marin, Frédéric Bourlès, Bernard Lherminier, Pascale Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) 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) 2009 https://hal.science/hal-00605941 https://hal.science/hal-00605941/document https://hal.science/hal-00605941/file/2009jtecho655_2E1.pdf https://doi.org/10.1175/2009JTECHO655.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/2009JTECHO655.1 hal-00605941 https://hal.science/hal-00605941 https://hal.science/hal-00605941/document https://hal.science/hal-00605941/file/2009jtecho655_2E1.pdf doi:10.1175/2009JTECHO655.1 IRD: PAR00004376 info:eu-repo/semantics/OpenAccess ISSN: 0739-0572 EISSN: 1520-0426 Journal of Atmospheric and Oceanic Technology https://hal.science/hal-00605941 Journal of Atmospheric and Oceanic Technology, 2009, 26, pp.2462-2473. ⟨10.1175/2009JTECHO655.1⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2009 ftmuseumnhn https://doi.org/10.1175/2009JTECHO655.1 2024-04-25T00:36:52Z International audience Data from French cruises in 1999-2007, a period during which Deep Blue (DB) or T7 expendable bathythermographs (XBTs) were deployed, and for which ancillary temperature data are available in the northeast Atlantic and equatorial Atlantic regions, are examined. There was a total of 16 cruises with XBTs launched between conductivity-temperature-depth (CTD) stations; during most of these, as well as during three additional cruises that were also considered, intake temperature was measured. XBT data from two voluntary observing ships in the North Atlantic subpolar gyre for which intake temperature was measured were also investigated. There is an XBT cold bias due to stirring of a stratified upper layer by the ship, resulting in differences between XBT temperatures at 3-5 m and intake measurements. This is most pronounced for midlatitude spring or summer cruises, when it averages about 0.10°C. When these situations are removed, the comparisons clearly indicate positive biases in XBT temperature measurements in 1999-2006, with individual cruise averages generally between 0° and 0.1°C, and a tendency to have larger biases when surface temperature is high. In addition, a positive depth-estimate bias of the XBTs in the upper thermocline (on the order of 4 m) is identified, as well as a depth overestimation through the profile, averaging 1.7% (1.2%) for the equatorial (midlatitude) cruises (with respect to a previously published depth estimate). Article in Journal/Newspaper North Atlantic Northeast Atlantic Muséum National d'Histoire Naturelle (MNHM): HAL Journal of Atmospheric and Oceanic Technology 26 11 2462 2473 |