Deep-penetration heat flow probes raise questions about interpretations from shorter probes

• Published in: Eos, Transactions American Geophysical Union
• Main Authors: Géli, L., Turon, J.-L., Aslanian, D., Balut, Y., Beuzart, P., Cochran, J., Francheteau, J., Harmegnies, F., Landuré, J.-Y., Le Suavé, R., Mazaud, A., Michel, E., Normand, A., Pichon, J.-J., Vlastélic, I.
• Other Authors: Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Environnements et Paléoenvironnements OCéaniques (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), L'Institut polaire français Paul-Emile Victor (IPEV), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), Domaines Océaniques (LDO), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Climat et Magnétisme (CLIMAG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Paléocéanographie (PALEOCEAN), Unité Géosciences Marines (GM), Laboratoire Magmas et Volcans (LMV), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC), Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2001
• Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces; environment; Antarctic; Indian; Saint-Paul; Southeast Indian Ridge; Australian-Antarctic Discordance; Langseth; Antarc*
• Online Access: https://hal.science/hal-02913482; https://hal.science/hal-02913482/document; https://hal.science/hal-02913482/file/01EO00186.pdf; https://doi.org/10.1029/01EO00186

International audience Simulation of recent northern winter climate trends by greenhouse-gas forcing, Nature, 399, 452-455,1999. Thompson, D.WJ., and J. M.Wallace,Annular modes in the extratropical circulation, Part I, month-to-month variability./ Clim., PAGES 317,320 More than 40% of the marine heat flow data collected since the early experiments of Sir Edward Bullard in 1949 were obtained using shallow penetration probes less than 5 m long [Louden and Wright, 1989] .The common belief that these data are reliable enough to model deep-seated thermal processes is sup ported by a few experiments in which heat flow measurements made in the Deep Sea Drilling Program (DSDP) and the Ocean Drilling Pro gram (ODP) were compared to nearby surface heat flow measurements [e.g.,Hyndman etal, 1984]. However, thermal measurements made with 18-m penetrations recently collected on the northern flank of the SouthEast Indian Ridge (SEIR) bring a new perspective to this belief. In the study area, measurements of heat flow taken at the surface (0-5 m) and mea surements taken at greater depths (3-18 m) did not always concur. Investigating this lack of agreement will help address difficult ques tions about the interpretation of shallow pene tration (< 5 m) marine heat flow measurements. The data were obtained during the MD120-ANTAUS expedition carried out by R/V Marion Dufresne that was conducted from October 12 to November 7,2000 from Fremantle, Australia, to La Reunion Island.The primary objective of this cruise was to study marine heat flow vari ations along a 14-Ma isochron that parallels the SouthEast Indian Ridge (SEIR) between the Saint-Paul/Amsterdam hot spot and the Australian-Antarctic Discordance (AAD),an anomalously deep section of the Mid-Ocean Ridge that is often attributed to a mantle "cold spot." In the 1960s and 1970s, heat flow meas urements were obtained near the AAD as part of reconnaissance surveys [Von Herzen and Langseth, 1966; Langseth and Taylor, 1967; Anderson et al., 1977]. However, to interpret heat ...