Water isotopic ratios from a continuously melted ice core sample
A new technique for on-line high resolution isotopic analysis of liquid water, tailored for ice core studies is presented. We built an interface between a Wavelength Scanned Cavity Ring Down Spectrometer (WS-CRDS) purchased from Picarro Inc. and a Continuous Flow Analysis (CFA) system. The system of...
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ftdoajarticles:oai:doaj.org/article:ed440fb3974648b8bc12e7921a2aff62 2023-05-15T16:38:53+02:00 Water isotopic ratios from a continuously melted ice core sample V. Gkinis T. J. Popp T. Blunier M. Bigler S. Schüpbach E. Kettner S. J. Johnsen 2011-11-01T00:00:00Z https://doi.org/10.5194/amt-4-2531-2011 https://doaj.org/article/ed440fb3974648b8bc12e7921a2aff62 EN eng Copernicus Publications http://www.atmos-meas-tech.net/4/2531/2011/amt-4-2531-2011.pdf https://doaj.org/toc/1867-1381 https://doaj.org/toc/1867-8548 doi:10.5194/amt-4-2531-2011 1867-1381 1867-8548 https://doaj.org/article/ed440fb3974648b8bc12e7921a2aff62 Atmospheric Measurement Techniques, Vol 4, Iss 11, Pp 2531-2542 (2011) Environmental engineering TA170-171 Earthwork. Foundations TA715-787 article 2011 ftdoajarticles https://doi.org/10.5194/amt-4-2531-2011 2022-12-31T00:31:03Z A new technique for on-line high resolution isotopic analysis of liquid water, tailored for ice core studies is presented. We built an interface between a Wavelength Scanned Cavity Ring Down Spectrometer (WS-CRDS) purchased from Picarro Inc. and a Continuous Flow Analysis (CFA) system. The system offers the possibility to perform simultaneuous water isotopic analysis of δ 18 O and δD on a continuous stream of liquid water as generated from a continuously melted ice rod. Injection of sub μl amounts of liquid water is achieved by pumping sample through a fused silica capillary and instantaneously vaporizing it with 100% efficiency in a~home made oven at a temperature of 170 °C. A calibration procedure allows for proper reporting of the data on the VSMOW–SLAP scale. We apply the necessary corrections based on the assessed performance of the system regarding instrumental drifts and dependance on the water concentration in the optical cavity. The melt rates are monitored in order to assign a depth scale to the measured isotopic profiles. Application of spectral methods yields the combined uncertainty of the system at below 0.1‰ and 0.5‰ for δ 18 O and δD, respectively. This performance is comparable to that achieved with mass spectrometry. Dispersion of the sample in the transfer lines limits the temporal resolution of the technique. In this work we investigate and assess these dispersion effects. By using an optimal filtering method we show how the measured profiles can be corrected for the smoothing effects resulting from the sample dispersion. Considering the significant advantages the technique offers, i.e. simultaneuous measurement of δ 18 O and δD, potentially in combination with chemical components that are traditionally measured on CFA systems, notable reduction on analysis time and power consumption, we consider it as an alternative to traditional isotope ratio mass spectrometry with the possibility to be deployed for field ice core studies. We present data acquired in the field during the 2010 season as ... Article in Journal/Newspaper ice core Directory of Open Access Journals: DOAJ Articles Atmospheric Measurement Techniques 4 11 2531 2542 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
topic |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 |
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Environmental engineering TA170-171 Earthwork. Foundations TA715-787 V. Gkinis T. J. Popp T. Blunier M. Bigler S. Schüpbach E. Kettner S. J. Johnsen Water isotopic ratios from a continuously melted ice core sample |
topic_facet |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 |
description |
A new technique for on-line high resolution isotopic analysis of liquid water, tailored for ice core studies is presented. We built an interface between a Wavelength Scanned Cavity Ring Down Spectrometer (WS-CRDS) purchased from Picarro Inc. and a Continuous Flow Analysis (CFA) system. The system offers the possibility to perform simultaneuous water isotopic analysis of δ 18 O and δD on a continuous stream of liquid water as generated from a continuously melted ice rod. Injection of sub μl amounts of liquid water is achieved by pumping sample through a fused silica capillary and instantaneously vaporizing it with 100% efficiency in a~home made oven at a temperature of 170 °C. A calibration procedure allows for proper reporting of the data on the VSMOW–SLAP scale. We apply the necessary corrections based on the assessed performance of the system regarding instrumental drifts and dependance on the water concentration in the optical cavity. The melt rates are monitored in order to assign a depth scale to the measured isotopic profiles. Application of spectral methods yields the combined uncertainty of the system at below 0.1‰ and 0.5‰ for δ 18 O and δD, respectively. This performance is comparable to that achieved with mass spectrometry. Dispersion of the sample in the transfer lines limits the temporal resolution of the technique. In this work we investigate and assess these dispersion effects. By using an optimal filtering method we show how the measured profiles can be corrected for the smoothing effects resulting from the sample dispersion. Considering the significant advantages the technique offers, i.e. simultaneuous measurement of δ 18 O and δD, potentially in combination with chemical components that are traditionally measured on CFA systems, notable reduction on analysis time and power consumption, we consider it as an alternative to traditional isotope ratio mass spectrometry with the possibility to be deployed for field ice core studies. We present data acquired in the field during the 2010 season as ... |
format |
Article in Journal/Newspaper |
author |
V. Gkinis T. J. Popp T. Blunier M. Bigler S. Schüpbach E. Kettner S. J. Johnsen |
author_facet |
V. Gkinis T. J. Popp T. Blunier M. Bigler S. Schüpbach E. Kettner S. J. Johnsen |
author_sort |
V. Gkinis |
title |
Water isotopic ratios from a continuously melted ice core sample |
title_short |
Water isotopic ratios from a continuously melted ice core sample |
title_full |
Water isotopic ratios from a continuously melted ice core sample |
title_fullStr |
Water isotopic ratios from a continuously melted ice core sample |
title_full_unstemmed |
Water isotopic ratios from a continuously melted ice core sample |
title_sort |
water isotopic ratios from a continuously melted ice core sample |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/amt-4-2531-2011 https://doaj.org/article/ed440fb3974648b8bc12e7921a2aff62 |
genre |
ice core |
genre_facet |
ice core |
op_source |
Atmospheric Measurement Techniques, Vol 4, Iss 11, Pp 2531-2542 (2011) |
op_relation |
http://www.atmos-meas-tech.net/4/2531/2011/amt-4-2531-2011.pdf https://doaj.org/toc/1867-1381 https://doaj.org/toc/1867-8548 doi:10.5194/amt-4-2531-2011 1867-1381 1867-8548 https://doaj.org/article/ed440fb3974648b8bc12e7921a2aff62 |
op_doi |
https://doi.org/10.5194/amt-4-2531-2011 |
container_title |
Atmospheric Measurement Techniques |
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4 |
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11 |
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2531 |
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2542 |
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1766029235386843136 |