Gas transfer experiment on a lake (Kerguelen Islands) using 3 He and SF 6
International audience Gas transfer velocities of SF6 and 3He were determined in a Kerguelen Islands lake at wind speeds in the range 0-10 m/s by injecting the two tracers into the water and measuring their concentrations over 40 days. Two methods are investigated for the determination of the relati...
Published in: | Journal of Geophysical Research: Oceans |
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Main Authors: | , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2000
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Online Access: | https://hal.archives-ouvertes.fr/hal-03122972 https://hal.archives-ouvertes.fr/hal-03122972/document https://hal.archives-ouvertes.fr/hal-03122972/file/1999JC900088.pdf https://doi.org/10.1029/1999JC900088 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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English |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment JEAN-BAPTISTE, Philippe Poisson, Alain Gas transfer experiment on a lake (Kerguelen Islands) using 3 He and SF 6 |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Gas transfer velocities of SF6 and 3He were determined in a Kerguelen Islands lake at wind speeds in the range 0-10 m/s by injecting the two tracers into the water and measuring their concentrations over 40 days. Two methods are investigated for the determination of the relationship linking the gas transfer velocity K to the wind speed W. The first method postulates a power law relationship K=I3W *. This leads to the same exponent ot=1.5+0.2 for both gases. The second method is the classic determination of the gas transfer velocity K• between two tracer measurements at times ti and t; using the well-mixed reservoir assumption. This method proves to be less favorable owing to its nonlinearity bias and also because it induces much scatter in the gas transfer coefficient/wind speed relationship. This dispersion is shown to arise from the experimental scatter of the data and, above all, fi-om the high sensitivity of the method to even small heterogeneities in the tracer vertical distribution. In the present experiment, the Liss and Merlivat correlation [Liss and Merlivat, 1986] is shown to underestimate the actual mean gas exchange rate by about 40%. Our results agree with the recent dual-tracer experiment by I4/hnninkhofet al. [ 1993 ] and are also consistent with CO2 transfer coefficient data derived from the study of •4C oceanic inventories. As expected from gas transfer theories and various experimental observations, the Schmidt number exponent in the comparison of 3He and SF, transfer velocities is found to vary substantially with the transfer regime. However, its variation is found to be greater than that tbrecast by current gas transfer models, with values as high as n=-0.2 for intermediate to strong winds. This again raises the question of the validity of the normalization method for Kco2 calculation d-ore gas transfer experiments, especially in high-wind regimes. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) |
format |
Article in Journal/Newspaper |
author |
JEAN-BAPTISTE, Philippe Poisson, Alain |
author_facet |
JEAN-BAPTISTE, Philippe Poisson, Alain |
author_sort |
JEAN-BAPTISTE, Philippe |
title |
Gas transfer experiment on a lake (Kerguelen Islands) using 3 He and SF 6 |
title_short |
Gas transfer experiment on a lake (Kerguelen Islands) using 3 He and SF 6 |
title_full |
Gas transfer experiment on a lake (Kerguelen Islands) using 3 He and SF 6 |
title_fullStr |
Gas transfer experiment on a lake (Kerguelen Islands) using 3 He and SF 6 |
title_full_unstemmed |
Gas transfer experiment on a lake (Kerguelen Islands) using 3 He and SF 6 |
title_sort |
gas transfer experiment on a lake (kerguelen islands) using 3 he and sf 6 |
publisher |
HAL CCSD |
publishDate |
2000 |
url |
https://hal.archives-ouvertes.fr/hal-03122972 https://hal.archives-ouvertes.fr/hal-03122972/document https://hal.archives-ouvertes.fr/hal-03122972/file/1999JC900088.pdf https://doi.org/10.1029/1999JC900088 |
long_lat |
ENVELOPE(-133.869,-133.869,67.417,67.417) |
geographic |
Islands Lake Kerguelen Kerguelen Islands |
geographic_facet |
Islands Lake Kerguelen Kerguelen Islands |
genre |
Kerguelen Islands |
genre_facet |
Kerguelen Islands |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.archives-ouvertes.fr/hal-03122972 Journal of Geophysical Research. Oceans, Wiley-Blackwell, 2000, 105 (C1), pp.1177-1186. ⟨10.1029/1999JC900088⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1029/1999JC900088 hal-03122972 https://hal.archives-ouvertes.fr/hal-03122972 https://hal.archives-ouvertes.fr/hal-03122972/document https://hal.archives-ouvertes.fr/hal-03122972/file/1999JC900088.pdf doi:10.1029/1999JC900088 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/1999JC900088 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
105 |
container_issue |
C1 |
container_start_page |
1177 |
op_container_end_page |
1186 |
_version_ |
1766055313624006656 |
spelling |
ftccsdartic:oai:HAL:hal-03122972v1 2023-05-15T17:02:05+02:00 Gas transfer experiment on a lake (Kerguelen Islands) using 3 He and SF 6 JEAN-BAPTISTE, Philippe Poisson, Alain Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) 2000-01-15 https://hal.archives-ouvertes.fr/hal-03122972 https://hal.archives-ouvertes.fr/hal-03122972/document https://hal.archives-ouvertes.fr/hal-03122972/file/1999JC900088.pdf https://doi.org/10.1029/1999JC900088 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/1999JC900088 hal-03122972 https://hal.archives-ouvertes.fr/hal-03122972 https://hal.archives-ouvertes.fr/hal-03122972/document https://hal.archives-ouvertes.fr/hal-03122972/file/1999JC900088.pdf doi:10.1029/1999JC900088 info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.archives-ouvertes.fr/hal-03122972 Journal of Geophysical Research. Oceans, Wiley-Blackwell, 2000, 105 (C1), pp.1177-1186. ⟨10.1029/1999JC900088⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2000 ftccsdartic https://doi.org/10.1029/1999JC900088 2021-12-19T00:32:21Z International audience Gas transfer velocities of SF6 and 3He were determined in a Kerguelen Islands lake at wind speeds in the range 0-10 m/s by injecting the two tracers into the water and measuring their concentrations over 40 days. Two methods are investigated for the determination of the relationship linking the gas transfer velocity K to the wind speed W. The first method postulates a power law relationship K=I3W *. This leads to the same exponent ot=1.5+0.2 for both gases. The second method is the classic determination of the gas transfer velocity K• between two tracer measurements at times ti and t; using the well-mixed reservoir assumption. This method proves to be less favorable owing to its nonlinearity bias and also because it induces much scatter in the gas transfer coefficient/wind speed relationship. This dispersion is shown to arise from the experimental scatter of the data and, above all, fi-om the high sensitivity of the method to even small heterogeneities in the tracer vertical distribution. In the present experiment, the Liss and Merlivat correlation [Liss and Merlivat, 1986] is shown to underestimate the actual mean gas exchange rate by about 40%. Our results agree with the recent dual-tracer experiment by I4/hnninkhofet al. [ 1993 ] and are also consistent with CO2 transfer coefficient data derived from the study of •4C oceanic inventories. As expected from gas transfer theories and various experimental observations, the Schmidt number exponent in the comparison of 3He and SF, transfer velocities is found to vary substantially with the transfer regime. However, its variation is found to be greater than that tbrecast by current gas transfer models, with values as high as n=-0.2 for intermediate to strong winds. This again raises the question of the validity of the normalization method for Kco2 calculation d-ore gas transfer experiments, especially in high-wind regimes. Article in Journal/Newspaper Kerguelen Islands Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Islands Lake ENVELOPE(-133.869,-133.869,67.417,67.417) Kerguelen Kerguelen Islands Journal of Geophysical Research: Oceans 105 C1 1177 1186 |