Continuous on-line water vapor isotope measurements in Antarctica
International audience In the context of a globally warming climate it is crucial to study the climate variability in the past and to understand the underlying mechanisms (1). Precipitation deposited on the polar ice caps provides a means to retrieve information on temperature changes (through the p...
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ftunigrenoble:oai:HAL:hal-00996065v1 2024-05-12T07:53:27+00:00 Continuous on-line water vapor isotope measurements in Antarctica Landsberg, Janek Romanini, Daniele Holmen, Kim Isaksson, Elisabeth Meijer, Harro Kerstel, Erik LAsers, Molécules et Environnement (LAME-LIPhy) Laboratoire Interdisciplinaire de Physique Saint Martin d’Hères (LIPhy) Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS) Norwegian Polar Institute Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS) 2010-05 https://hal.science/hal-00996065 en eng HAL CCSD Copernicus Meetings hal-00996065 https://hal.science/hal-00996065 BIBCODE: 2010EGUGA.1215208L EGU General Assembly 2010 https://hal.science/hal-00996065 EGU General Assembly 2010, 2010, 12, pp.15208 [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] info:eu-repo/semantics/article Journal articles 2010 ftunigrenoble 2024-04-18T02:06:41Z International audience In the context of a globally warming climate it is crucial to study the climate variability in the past and to understand the underlying mechanisms (1). Precipitation deposited on the polar ice caps provides a means to retrieve information on temperature changes (through the paleo-temperature dependence of the isotopic composition of the ice) and atmospheric composition (of gas stored in bubbles in the ice) on time scales from one to almost one million years, with sub-annual resolution in the most recent centuries. However, it is now widely recognized that the calibration of the paleo-thermometer is highly problematic. For this reason attempts to model the global water cycle, including the isotope signals, are ongoing with the aim of providing a more physical basis of the isotope - temperature relation. Currently, there is a large divergence in the results obtained by different modeling strategies. The missing link in these model studies is their forcing by experimental data on the pre-deposition isotopic composition of the vapor phase compartment of the hydrological cycle. We propose to measure the isotopic composition of moisture carried towards and deposited on Antarctica, in order to constrain the numerical models. In this context we are developing a modified, more sensitive and precise, version of a laser water vapor isotope spectrometer, originally designed for stratospheric studies (2, 3). This instrument, which will first be operated at the Norwegian station of Troll in Queen Maud Land, will enable the continuous, online measurement of all three stable isotope ratios of atmospheric water vapor. So far, such data is non-existent. Our data should improve the validity of the models and improve the understanding of the physical mechanisms at the basis of the isotope thermometer. This in turn will lead to an increased confidence in the predictions of (general circulation) models concerning climate variability. (1) International Panel on Climate Change (IPCC), 4th Assessment Report, ... Article in Journal/Newspaper Antarc* Antarctica Queen Maud Land Université Grenoble Alpes: HAL Queen Maud Land ENVELOPE(12.000,12.000,-72.500,-72.500) Troll ENVELOPE(2.534,2.534,-72.002,-72.002) |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] |
spellingShingle |
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] Landsberg, Janek Romanini, Daniele Holmen, Kim Isaksson, Elisabeth Meijer, Harro Kerstel, Erik Continuous on-line water vapor isotope measurements in Antarctica |
topic_facet |
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] |
description |
International audience In the context of a globally warming climate it is crucial to study the climate variability in the past and to understand the underlying mechanisms (1). Precipitation deposited on the polar ice caps provides a means to retrieve information on temperature changes (through the paleo-temperature dependence of the isotopic composition of the ice) and atmospheric composition (of gas stored in bubbles in the ice) on time scales from one to almost one million years, with sub-annual resolution in the most recent centuries. However, it is now widely recognized that the calibration of the paleo-thermometer is highly problematic. For this reason attempts to model the global water cycle, including the isotope signals, are ongoing with the aim of providing a more physical basis of the isotope - temperature relation. Currently, there is a large divergence in the results obtained by different modeling strategies. The missing link in these model studies is their forcing by experimental data on the pre-deposition isotopic composition of the vapor phase compartment of the hydrological cycle. We propose to measure the isotopic composition of moisture carried towards and deposited on Antarctica, in order to constrain the numerical models. In this context we are developing a modified, more sensitive and precise, version of a laser water vapor isotope spectrometer, originally designed for stratospheric studies (2, 3). This instrument, which will first be operated at the Norwegian station of Troll in Queen Maud Land, will enable the continuous, online measurement of all three stable isotope ratios of atmospheric water vapor. So far, such data is non-existent. Our data should improve the validity of the models and improve the understanding of the physical mechanisms at the basis of the isotope thermometer. This in turn will lead to an increased confidence in the predictions of (general circulation) models concerning climate variability. (1) International Panel on Climate Change (IPCC), 4th Assessment Report, ... |
author2 |
LAsers, Molécules et Environnement (LAME-LIPhy) Laboratoire Interdisciplinaire de Physique Saint Martin d’Hères (LIPhy) Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS) Norwegian Polar Institute Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Landsberg, Janek Romanini, Daniele Holmen, Kim Isaksson, Elisabeth Meijer, Harro Kerstel, Erik |
author_facet |
Landsberg, Janek Romanini, Daniele Holmen, Kim Isaksson, Elisabeth Meijer, Harro Kerstel, Erik |
author_sort |
Landsberg, Janek |
title |
Continuous on-line water vapor isotope measurements in Antarctica |
title_short |
Continuous on-line water vapor isotope measurements in Antarctica |
title_full |
Continuous on-line water vapor isotope measurements in Antarctica |
title_fullStr |
Continuous on-line water vapor isotope measurements in Antarctica |
title_full_unstemmed |
Continuous on-line water vapor isotope measurements in Antarctica |
title_sort |
continuous on-line water vapor isotope measurements in antarctica |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00996065 |
long_lat |
ENVELOPE(12.000,12.000,-72.500,-72.500) ENVELOPE(2.534,2.534,-72.002,-72.002) |
geographic |
Queen Maud Land Troll |
geographic_facet |
Queen Maud Land Troll |
genre |
Antarc* Antarctica Queen Maud Land |
genre_facet |
Antarc* Antarctica Queen Maud Land |
op_source |
EGU General Assembly 2010 https://hal.science/hal-00996065 EGU General Assembly 2010, 2010, 12, pp.15208 |
op_relation |
hal-00996065 https://hal.science/hal-00996065 BIBCODE: 2010EGUGA.1215208L |
_version_ |
1798842779998093312 |