New technique for high-precision, simultaneous measurements of CH4, N2O and CO2 concentrations: isotopic and elemental ratios of N-2, O-2 and Ar; and total air content in ice cores by wet extraction

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

New technique for high-precision, simultaneous measurements of CH4, N2O and CO2 concentrations : isotopic and elemental ratios of N-2, O-2 and Ar; and total air content in ice cores by wet extraction. / Oyabu, Ikumi; Kawamura, Kenji; Kitamura, Kyotaro; Dallmayr, Remi; Kitamura, Akihiro; Sawada, Chikako; Severinghaus, Jeffrey P.; Beaudette, Ross; Orsi, Anais; Sugawara, Satoshi; Ishidoya, Shigeyuki; Dahl-Jensen, Dorthe; Goto-Azuma, Kumiko; Aoki, Shuji; Nakazawa, Takakiyo.

In: Atmospheric Measurement Techniques, Vol. 13, No. 12, 2020, p. 6703-6731.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Oyabu, I, Kawamura, K, Kitamura, K, Dallmayr, R, Kitamura, A, Sawada, C, Severinghaus, JP, Beaudette, R, Orsi, A, Sugawara, S, Ishidoya, S, Dahl-Jensen, D, Goto-Azuma, K, Aoki, S & Nakazawa, T 2020, 'New technique for high-precision, simultaneous measurements of CH4, N2O and CO2 concentrations: isotopic and elemental ratios of N-2, O-2 and Ar; and total air content in ice cores by wet extraction', Atmospheric Measurement Techniques, vol. 13, no. 12, pp. 6703-6731. https://doi.org/10.5194/amt-13-6703-2020

APA

Oyabu, I., Kawamura, K., Kitamura, K., Dallmayr, R., Kitamura, A., Sawada, C., Severinghaus, J. P., Beaudette, R., Orsi, A., Sugawara, S., Ishidoya, S., Dahl-Jensen, D., Goto-Azuma, K., Aoki, S., & Nakazawa, T. (2020). New technique for high-precision, simultaneous measurements of CH4, N2O and CO2 concentrations: isotopic and elemental ratios of N-2, O-2 and Ar; and total air content in ice cores by wet extraction. Atmospheric Measurement Techniques, 13(12), 6703-6731. https://doi.org/10.5194/amt-13-6703-2020

Vancouver

Oyabu I, Kawamura K, Kitamura K, Dallmayr R, Kitamura A, Sawada C et al. New technique for high-precision, simultaneous measurements of CH4, N2O and CO2 concentrations: isotopic and elemental ratios of N-2, O-2 and Ar; and total air content in ice cores by wet extraction. Atmospheric Measurement Techniques. 2020;13(12):6703-6731. https://doi.org/10.5194/amt-13-6703-2020

Author

Oyabu, Ikumi ; Kawamura, Kenji ; Kitamura, Kyotaro ; Dallmayr, Remi ; Kitamura, Akihiro ; Sawada, Chikako ; Severinghaus, Jeffrey P. ; Beaudette, Ross ; Orsi, Anais ; Sugawara, Satoshi ; Ishidoya, Shigeyuki ; Dahl-Jensen, Dorthe ; Goto-Azuma, Kumiko ; Aoki, Shuji ; Nakazawa, Takakiyo. / New technique for high-precision, simultaneous measurements of CH4, N2O and CO2 concentrations : isotopic and elemental ratios of N-2, O-2 and Ar; and total air content in ice cores by wet extraction. In: Atmospheric Measurement Techniques. 2020 ; Vol. 13, No. 12. pp. 6703-6731.

Bibtex

@article{fa9000b96ce84a109deaaed431bb90b9,
title = "New technique for high-precision, simultaneous measurements of CH4, N2O and CO2 concentrations: isotopic and elemental ratios of N-2, O-2 and Ar; and total air content in ice cores by wet extraction",
abstract = "Air in polar ice cores provides unique information on past climatic and atmospheric changes. We developed a new method combining wet extraction, gas chromatography and mass spectrometry for high-precision, simultaneous measurements of eight air components (CH4, N2O and CO2 concentrations; delta N-15, delta O-18, delta O-2/N-2 and delta Ar/N-2; and total air content) from an ice-core sample of similar to 60 g. The ice sample is evacuated for similar to 2 h and melted under vacuum, and the released air is continuously transferred into a sample tube at 10K within 10 min. The air is homogenized in the sample tube overnight at room temperature and split into two aliquots for mass spectrometric and gas chromatographic measurements. Care is taken to minimize (1) contamination of greenhouse gases by using a long evacuation time, (2) consumption of oxygen during sample storage by a passivation treatment on sample tubes, and (3) fractionation of isotopic ratios with a long homogenization time for splitting. Precision is assessed by analyzing standard gases with artificial ice and duplicate measurements of the Dome Fuji and NEEM ice cores. The overall reproducibility (1 SD) of duplicate ice-core analyses are 3.2 ppb, 2.2 ppb and 2.9 ppm for CH4, N2O and CO2 concentrations; 0.006 %, 0.011 %, 0.09% and 0.12% for delta N-15, delta O-18, delta O-2/N-2 and delta Ar/N-2; and 0.63mL(STP) kg(-1) for total air content, respectively. Our new method successfully combines the high-precision, small-sample and multiple-species measurements, with a wide range of applications for ice-core paleoenviron-mental studies.",
keywords = "ABRUPT CLIMATE-CHANGE, ATMOSPHERIC METHANE CONCENTRATION, TRAPPED AIR, POLAR ICE, MIXING RATIOS, ANTARCTIC ICE, NITROUS-OXIDE, TRACE GASES, SIPLE DOME, GREENLAND",
author = "Ikumi Oyabu and Kenji Kawamura and Kyotaro Kitamura and Remi Dallmayr and Akihiro Kitamura and Chikako Sawada and Severinghaus, {Jeffrey P.} and Ross Beaudette and Anais Orsi and Satoshi Sugawara and Shigeyuki Ishidoya and Dorthe Dahl-Jensen and Kumiko Goto-Azuma and Shuji Aoki and Takakiyo Nakazawa",
year = "2020",
doi = "10.5194/amt-13-6703-2020",
language = "English",
volume = "13",
pages = "6703--6731",
journal = "Atmospheric Measurement Techniques",
issn = "1867-1381",
publisher = "Copernicus GmbH",
number = "12",

}

RIS

TY - JOUR

T1 - New technique for high-precision, simultaneous measurements of CH4, N2O and CO2 concentrations

T2 - isotopic and elemental ratios of N-2, O-2 and Ar; and total air content in ice cores by wet extraction

AU - Oyabu, Ikumi

AU - Kawamura, Kenji

AU - Kitamura, Kyotaro

AU - Dallmayr, Remi

AU - Kitamura, Akihiro

AU - Sawada, Chikako

AU - Severinghaus, Jeffrey P.

AU - Beaudette, Ross

AU - Orsi, Anais

AU - Sugawara, Satoshi

AU - Ishidoya, Shigeyuki

AU - Dahl-Jensen, Dorthe

AU - Goto-Azuma, Kumiko

AU - Aoki, Shuji

AU - Nakazawa, Takakiyo

PY - 2020

Y1 - 2020

N2 - Air in polar ice cores provides unique information on past climatic and atmospheric changes. We developed a new method combining wet extraction, gas chromatography and mass spectrometry for high-precision, simultaneous measurements of eight air components (CH4, N2O and CO2 concentrations; delta N-15, delta O-18, delta O-2/N-2 and delta Ar/N-2; and total air content) from an ice-core sample of similar to 60 g. The ice sample is evacuated for similar to 2 h and melted under vacuum, and the released air is continuously transferred into a sample tube at 10K within 10 min. The air is homogenized in the sample tube overnight at room temperature and split into two aliquots for mass spectrometric and gas chromatographic measurements. Care is taken to minimize (1) contamination of greenhouse gases by using a long evacuation time, (2) consumption of oxygen during sample storage by a passivation treatment on sample tubes, and (3) fractionation of isotopic ratios with a long homogenization time for splitting. Precision is assessed by analyzing standard gases with artificial ice and duplicate measurements of the Dome Fuji and NEEM ice cores. The overall reproducibility (1 SD) of duplicate ice-core analyses are 3.2 ppb, 2.2 ppb and 2.9 ppm for CH4, N2O and CO2 concentrations; 0.006 %, 0.011 %, 0.09% and 0.12% for delta N-15, delta O-18, delta O-2/N-2 and delta Ar/N-2; and 0.63mL(STP) kg(-1) for total air content, respectively. Our new method successfully combines the high-precision, small-sample and multiple-species measurements, with a wide range of applications for ice-core paleoenviron-mental studies.

AB - Air in polar ice cores provides unique information on past climatic and atmospheric changes. We developed a new method combining wet extraction, gas chromatography and mass spectrometry for high-precision, simultaneous measurements of eight air components (CH4, N2O and CO2 concentrations; delta N-15, delta O-18, delta O-2/N-2 and delta Ar/N-2; and total air content) from an ice-core sample of similar to 60 g. The ice sample is evacuated for similar to 2 h and melted under vacuum, and the released air is continuously transferred into a sample tube at 10K within 10 min. The air is homogenized in the sample tube overnight at room temperature and split into two aliquots for mass spectrometric and gas chromatographic measurements. Care is taken to minimize (1) contamination of greenhouse gases by using a long evacuation time, (2) consumption of oxygen during sample storage by a passivation treatment on sample tubes, and (3) fractionation of isotopic ratios with a long homogenization time for splitting. Precision is assessed by analyzing standard gases with artificial ice and duplicate measurements of the Dome Fuji and NEEM ice cores. The overall reproducibility (1 SD) of duplicate ice-core analyses are 3.2 ppb, 2.2 ppb and 2.9 ppm for CH4, N2O and CO2 concentrations; 0.006 %, 0.011 %, 0.09% and 0.12% for delta N-15, delta O-18, delta O-2/N-2 and delta Ar/N-2; and 0.63mL(STP) kg(-1) for total air content, respectively. Our new method successfully combines the high-precision, small-sample and multiple-species measurements, with a wide range of applications for ice-core paleoenviron-mental studies.

KW - ABRUPT CLIMATE-CHANGE

KW - ATMOSPHERIC METHANE CONCENTRATION

KW - TRAPPED AIR

KW - POLAR ICE

KW - MIXING RATIOS

KW - ANTARCTIC ICE

KW - NITROUS-OXIDE

KW - TRACE GASES

KW - SIPLE DOME

KW - GREENLAND

U2 - 10.5194/amt-13-6703-2020

DO - 10.5194/amt-13-6703-2020

M3 - Journal article

VL - 13

SP - 6703

EP - 6731

JO - Atmospheric Measurement Techniques

JF - Atmospheric Measurement Techniques

SN - 1867-1381

IS - 12

ER -

ID: 271764945