AustralieFrV1, PascalFrancis, Checkpoint, bibRecord, 003455

A novel method for obtaining very large ancient air samples from ablating glacial ice for analyses of methane radiocarbon

Identifieur interne : 003455 ( PascalFrancis/Checkpoint ); précédent : 003454; suivant : 003456

A novel method for obtaining very large ancient air samples from ablating glacial ice for analyses of methane radiocarbon

Auteurs : Vasilii V. Petrenko [États-Unis] ; Jeffrey P. Severinghaus [États-Unis] ; Edward J. Brook [États-Unis] ; Jens Mühle [États-Unis] ; Melissa Headly [États-Unis] ; Christina M. Harth [États-Unis] ; Hinrich Schaefer [États-Unis, France] ; Niels Reeh [Danemark] ; Ray F. Weiss [États-Unis] ; Dave Lowe [Nouvelle-Zélande] ; Andrew M. Smith [Australie]

Source :

Journal of Glaciology [ 0022-1430 ] ; 2008.

RBID : Pascal:08-0534498

Descripteurs français

Pascal (Inist)
- Glace, Méthane, Réchauffement, Ablation, Fractionnement isotopique, Contamination, C 14, Méthodologie analyse, Air, Inclusion, Paléoatmosphère, Clathrate, Déglaciation, Quaternaire sup, Younger Dryas, Préboréal, Dryas, Bölling, Changement climatique, Groenland Ouest, Extraction, Isotope, N 15-N 14, O 18-O 16, Gaz effet serre, Gaz rare, Instrumentation.
Wicri :
- topic : Glace, Changement climatique, Gaz rare.

English descriptors

KwdEn :
- Bolling, C-14, Dryas, N-15/N-14, O-18/O-16, Preboreal, West Greenland, Younger Dryas, ablation, air, chemical analysis methodology, clathrate, climate change, contamination, deglaciation, extraction, greenhouse gas, ice, inclusions, instruments, isotope fractionation, isotopes, methane, noble gases, paleoatmosphere, upper Quaternary, warming.

Abstract

We present techniques for obtaining large (∼100 LSTP) samples of ancient air for analysis of ¹⁴C of methane (¹⁴CH₄) and other trace constituents. Paleoatmospheric ¹⁴CH₄ measurements should constrain the fossil fraction of past methane budgets, as well as provide a definitive test of methane clathrate involvement in large and rapid methane concentration ([CH₄]) increases that accompanied rapid warming events during the last deglaciation. Air dating to the Younger Dryas-Preboreal and Oldest Dryas-Bølling abrupt climatic transitions was obtained by melt extraction from old glacial ice outcropping at an ablation margin in West Greenland. The outcropping ice and occluded air were dated using a combination of δ¹⁵N of N₂, δ¹⁸O of O₂, δ¹⁸O_ice and [CH₄] measurements. The [CH₄] blank of the melt extractions was <4ppb. Measurements of δ¹⁸O and δ¹⁵N indicated no significant gas isotopic fractionation from handling. Measured Ar/N₂, CFC-11 and CFC-12 in the samples indicated no significant contamination from ambient air. Ar/N₂, Kr/Ar and Xe/Ar ratios in the samples were used to quantify effects of gas dissolution during the melt extractions and correct the sample [CH₄]. Corrected [CH₄] is elevated over expected values by up to 132 ppb for most samples, suggesting some in situ CH₄ production in ice at this site.

Affiliations:

Australie, Danemark, France, Nouvelle-Zélande, États-Unis

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Le document en format XML

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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">A novel method for obtaining very large ancient air samples from ablating glacial ice for analyses of methane radiocarbon</title>
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<series><title level="j" type="main">Journal of Glaciology</title>
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<seriesStmt><title level="j" type="main">Journal of Glaciology</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Bolling</term>
<term>C-14</term>
<term>Dryas</term>
<term>N-15/N-14</term>
<term>O-18/O-16</term>
<term>Preboreal</term>
<term>West Greenland</term>
<term>Younger Dryas</term>
<term>ablation</term>
<term>air</term>
<term>chemical analysis methodology</term>
<term>clathrate</term>
<term>climate change</term>
<term>contamination</term>
<term>deglaciation</term>
<term>extraction</term>
<term>greenhouse gas</term>
<term>ice</term>
<term>inclusions</term>
<term>instruments</term>
<term>isotope fractionation</term>
<term>isotopes</term>
<term>methane</term>
<term>noble gases</term>
<term>paleoatmosphere</term>
<term>upper Quaternary</term>
<term>warming</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Glace</term>
<term>Méthane</term>
<term>Réchauffement</term>
<term>Ablation</term>
<term>Fractionnement isotopique</term>
<term>Contamination</term>
<term>C 14</term>
<term>Méthodologie analyse</term>
<term>Air</term>
<term>Inclusion</term>
<term>Paléoatmosphère</term>
<term>Clathrate</term>
<term>Déglaciation</term>
<term>Quaternaire sup</term>
<term>Younger Dryas</term>
<term>Préboréal</term>
<term>Dryas</term>
<term>Bölling</term>
<term>Changement climatique</term>
<term>Groenland Ouest</term>
<term>Extraction</term>
<term>Isotope</term>
<term>N 15-N 14</term>
<term>O 18-O 16</term>
<term>Gaz effet serre</term>
<term>Gaz rare</term>
<term>Instrumentation</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Glace</term>
<term>Changement climatique</term>
<term>Gaz rare</term>
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<front><div type="abstract" xml:lang="en">We present techniques for obtaining large (∼100 LSTP) samples of ancient air for analysis of <sup>14</sup>
C of methane (<sup>14</sup>
CH<sub>4</sub>
) and other trace constituents. Paleoatmospheric <sup>14</sup>
CH<sub>4</sub>
 measurements should constrain the fossil fraction of past methane budgets, as well as provide a definitive test of methane clathrate involvement in large and rapid methane concentration ([CH<sub>4</sub>
]) increases that accompanied rapid warming events during the last deglaciation. Air dating to the Younger Dryas-Preboreal and Oldest Dryas-Bølling abrupt climatic transitions was obtained by melt extraction from old glacial ice outcropping at an ablation margin in West Greenland. The outcropping ice and occluded air were dated using a combination of δ<sup>15</sup>
N of N<sub>2</sub>
, δ<sup>18</sup>
O of O<sub>2</sub>
, δ<sup>18</sup>
O<sub>ice</sub>
 and [CH<sub>4</sub>
] measurements. The [CH<sub>4</sub>
] blank of the melt extractions was <4ppb. Measurements of δ<sup>18</sup>
O and δ<sup>15</sup>
N indicated no significant gas isotopic fractionation from handling. Measured Ar/N<sub>2</sub>
, CFC-11 and CFC-12 in the samples indicated no significant contamination from ambient air. Ar/N<sub>2</sub>
, Kr/Ar and Xe/Ar ratios in the samples were used to quantify effects of gas dissolution during the melt extractions and correct the sample [CH<sub>4</sub>
]. Corrected [CH<sub>4</sub>
] is elevated over expected values by up to 132 ppb for most samples, suggesting some in situ CH<sub>4</sub>
 production in ice at this site.</div>
</front>
</TEI>
<inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0022-1430</s0>
</fA01>
<fA02 i1="01"><s0>JOGLAO</s0>
</fA02>
<fA03 i2="1"><s0>J. Glaciol.</s0>
</fA03>
<fA05><s2>54</s2>
</fA05>
<fA06><s2>185</s2>
</fA06>
<fA08 i1="01" i2="1" l="ENG"><s1>A novel method for obtaining very large ancient air samples from ablating glacial ice for analyses of methane radiocarbon</s1>
</fA08>
<fA11 i1="01" i2="1"><s1>PETRENKO (Vasilii V.)</s1>
</fA11>
<fA11 i1="02" i2="1"><s1>SEVERINGHAUS (Jeffrey P.)</s1>
</fA11>
<fA11 i1="03" i2="1"><s1>BROOK (Edward J.)</s1>
</fA11>
<fA11 i1="04" i2="1"><s1>MÜHLE (Jens)</s1>
</fA11>
<fA11 i1="05" i2="1"><s1>HEADLY (Melissa)</s1>
</fA11>
<fA11 i1="06" i2="1"><s1>HARTH (Christina M.)</s1>
</fA11>
<fA11 i1="07" i2="1"><s1>SCHAEFER (Hinrich)</s1>
</fA11>
<fA11 i1="08" i2="1"><s1>REEH (Niels)</s1>
</fA11>
<fA11 i1="09" i2="1"><s1>WEISS (Ray F.)</s1>
</fA11>
<fA11 i1="10" i2="1"><s1>LOWE (Dave)</s1>
</fA11>
<fA11 i1="11" i2="1"><s1>SMITH (Andrew M.)</s1>
</fA11>
<fA14 i1="01"><s1>Scripps Institution of Oceanography (SIO), University of California-San Diego</s1>
<s2>La Jolla, Calilfornia, 92093-0225</s2>
<s3>USA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>5 aut.</sZ>
<sZ>6 aut.</sZ>
<sZ>9 aut.</sZ>
</fA14>
<fA14 i1="02"><s1>Department of Geosciences, Oregon State University</s1>
<s2>Corvallis, Oregon, 97331</s2>
<s3>USA</s3>
<sZ>3 aut.</sZ>
<sZ>7 aut.</sZ>
</fA14>
<fA14 i1="03"><s1>Laboratoire de Glaciologie et Géophysique de l'Environnement du CNRS (associé à I'Université Joseph Fourier-Grenoble I), 54 rue Molière, BP 96</s1>
<s2>38402 Saint-Martin-d'Hères</s2>
<s3>FRA</s3>
<sZ>7 aut.</sZ>
</fA14>
<fA14 i1="04"><s1>Danish National Space Center, Technical University of Denmark, Building 348, Ørsteds Plads</s1>
<s2>2800 Kgs. Lyngby</s2>
<s3>DNK</s3>
<sZ>8 aut.</sZ>
</fA14>
<fA14 i1="05"><s1>National Institute of Water and Atmospheric Research Ltd (NIWA), PO Box 14901, Kilbirnie, 301 Evans Bay Parade</s1>
<s2>Wellington</s2>
<s3>NZL</s3>
<sZ>10 aut.</sZ>
</fA14>
<fA14 i1="06"><s1>Australian Nuclear Science and Technology Organisation, PMB 1</s1>
<s2>Menai, New South Wales 2234</s2>
<s3>AUS</s3>
<sZ>11 aut.</sZ>
</fA14>
<fA20><s1>233-244</s1>
</fA20>
<fA21><s1>2008</s1>
</fA21>
<fA23 i1="01"><s0>ENG</s0>
</fA23>
<fA43 i1="01"><s1>INIST</s1>
<s2>5524</s2>
<s5>354000198015710050</s5>
</fA43>
<fA44><s0>0000</s0>
<s1>© 2008 INIST-CNRS. All rights reserved.</s1>
</fA44>
<fA45><s0>1 p.1/4</s0>
</fA45>
<fA47 i1="01" i2="1"><s0>08-0534498</s0>
</fA47>
<fA60><s1>P</s1>
</fA60>
<fA61><s0>A</s0>
</fA61>
<fA64 i1="01" i2="1"><s0>Journal of Glaciology</s0>
</fA64>
<fA66 i1="01"><s0>GBR</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>We present techniques for obtaining large (∼100 LSTP) samples of ancient air for analysis of <sup>14</sup>
C of methane (<sup>14</sup>
CH<sub>4</sub>
) and other trace constituents. Paleoatmospheric <sup>14</sup>
CH<sub>4</sub>
 measurements should constrain the fossil fraction of past methane budgets, as well as provide a definitive test of methane clathrate involvement in large and rapid methane concentration ([CH<sub>4</sub>
]) increases that accompanied rapid warming events during the last deglaciation. Air dating to the Younger Dryas-Preboreal and Oldest Dryas-Bølling abrupt climatic transitions was obtained by melt extraction from old glacial ice outcropping at an ablation margin in West Greenland. The outcropping ice and occluded air were dated using a combination of δ<sup>15</sup>
N of N<sub>2</sub>
, δ<sup>18</sup>
O of O<sub>2</sub>
, δ<sup>18</sup>
O<sub>ice</sub>
 and [CH<sub>4</sub>
] measurements. The [CH<sub>4</sub>
] blank of the melt extractions was <4ppb. Measurements of δ<sup>18</sup>
O and δ<sup>15</sup>
N indicated no significant gas isotopic fractionation from handling. Measured Ar/N<sub>2</sub>
, CFC-11 and CFC-12 in the samples indicated no significant contamination from ambient air. Ar/N<sub>2</sub>
, Kr/Ar and Xe/Ar ratios in the samples were used to quantify effects of gas dissolution during the melt extractions and correct the sample [CH<sub>4</sub>
]. Corrected [CH<sub>4</sub>
] is elevated over expected values by up to 132 ppb for most samples, suggesting some in situ CH<sub>4</sub>
 production in ice at this site.</s0>
</fC01>
<fC02 i1="01" i2="2"><s0>001E01C02</s0>
</fC02>
<fC02 i1="02" i2="2"><s0>220C02</s0>
</fC02>
<fC03 i1="01" i2="2" l="FRE"><s0>Glace</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="2" l="ENG"><s0>ice</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="2" l="SPA"><s0>Hielo</s0>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="2" l="FRE"><s0>Méthane</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="2" l="ENG"><s0>methane</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="2" l="SPA"><s0>Metano</s0>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="2" l="FRE"><s0>Réchauffement</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="2" l="ENG"><s0>warming</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="2" l="FRE"><s0>Ablation</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="2" l="ENG"><s0>ablation</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="2" l="SPA"><s0>Ablación</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="2" l="FRE"><s0>Fractionnement isotopique</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="2" l="ENG"><s0>isotope fractionation</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="2" l="SPA"><s0>Fraccionamiento isotópico</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="2" l="FRE"><s0>Contamination</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="2" l="ENG"><s0>contamination</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="2" l="SPA"><s0>Contaminación</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="2" l="FRE"><s0>C 14</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="2" l="ENG"><s0>C-14</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="2" l="SPA"><s0>C 14</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="2" l="FRE"><s0>Méthodologie analyse</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="2" l="ENG"><s0>chemical analysis methodology</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="2" l="SPA"><s0>Metodología análisis</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="2" l="FRE"><s0>Air</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="2" l="ENG"><s0>air</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="2" l="FRE"><s0>Inclusion</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="2" l="ENG"><s0>inclusions</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="2" l="SPA"><s0>Inclusión</s0>
<s5>10</s5>
</fC03>
<fC03 i1="11" i2="2" l="FRE"><s0>Paléoatmosphère</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="2" l="ENG"><s0>paleoatmosphere</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="2" l="SPA"><s0>Paleoatmósfera</s0>
<s5>11</s5>
</fC03>
<fC03 i1="12" i2="2" l="FRE"><s0>Clathrate</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="2" l="ENG"><s0>clathrate</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="2" l="SPA"><s0>Clatrato</s0>
<s5>12</s5>
</fC03>
<fC03 i1="13" i2="2" l="FRE"><s0>Déglaciation</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="2" l="ENG"><s0>deglaciation</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="2" l="SPA"><s0>Desglaciación</s0>
<s5>13</s5>
</fC03>
<fC03 i1="14" i2="2" l="FRE"><s0>Quaternaire sup</s0>
<s2>NX</s2>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="2" l="ENG"><s0>upper Quaternary</s0>
<s2>NX</s2>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="2" l="SPA"><s0>Cuaternario sup</s0>
<s2>NX</s2>
<s5>14</s5>
</fC03>
<fC03 i1="15" i2="2" l="FRE"><s0>Younger Dryas</s0>
<s2>NX</s2>
<s5>15</s5>
</fC03>
<fC03 i1="15" i2="2" l="ENG"><s0>Younger Dryas</s0>
<s2>NX</s2>
<s5>15</s5>
</fC03>
<fC03 i1="16" i2="2" l="FRE"><s0>Préboréal</s0>
<s2>NX</s2>
<s5>16</s5>
</fC03>
<fC03 i1="16" i2="2" l="ENG"><s0>Preboreal</s0>
<s2>NX</s2>
<s5>16</s5>
</fC03>
<fC03 i1="16" i2="2" l="SPA"><s0>Preboreal</s0>
<s2>NX</s2>
<s5>16</s5>
</fC03>
<fC03 i1="17" i2="2" l="FRE"><s0>Dryas</s0>
<s2>NX</s2>
<s5>17</s5>
</fC03>
<fC03 i1="17" i2="2" l="ENG"><s0>Dryas</s0>
<s2>NX</s2>
<s5>17</s5>
</fC03>
<fC03 i1="18" i2="2" l="FRE"><s0>Bölling</s0>
<s2>NX</s2>
<s5>18</s5>
</fC03>
<fC03 i1="18" i2="2" l="ENG"><s0>Bolling</s0>
<s2>NX</s2>
<s5>18</s5>
</fC03>
<fC03 i1="19" i2="2" l="FRE"><s0>Changement climatique</s0>
<s5>19</s5>
</fC03>
<fC03 i1="19" i2="2" l="ENG"><s0>climate change</s0>
<s5>19</s5>
</fC03>
<fC03 i1="20" i2="2" l="FRE"><s0>Groenland Ouest</s0>
<s2>NG</s2>
<s5>21</s5>
</fC03>
<fC03 i1="20" i2="2" l="ENG"><s0>West Greenland</s0>
<s2>NG</s2>
<s5>21</s5>
</fC03>
<fC03 i1="20" i2="2" l="SPA"><s0>Groenlandia del Oeste</s0>
<s2>NG</s2>
<s5>21</s5>
</fC03>
<fC03 i1="21" i2="2" l="FRE"><s0>Extraction</s0>
<s5>22</s5>
</fC03>
<fC03 i1="21" i2="2" l="ENG"><s0>extraction</s0>
<s5>22</s5>
</fC03>
<fC03 i1="22" i2="2" l="FRE"><s0>Isotope</s0>
<s5>23</s5>
</fC03>
<fC03 i1="22" i2="2" l="ENG"><s0>isotopes</s0>
<s5>23</s5>
</fC03>
<fC03 i1="22" i2="2" l="SPA"><s0>Isótopo</s0>
<s5>23</s5>
</fC03>
<fC03 i1="23" i2="2" l="FRE"><s0>N 15-N 14</s0>
<s5>24</s5>
</fC03>
<fC03 i1="23" i2="2" l="ENG"><s0>N-15/N-14</s0>
<s5>24</s5>
</fC03>
<fC03 i1="23" i2="2" l="SPA"><s0>N 15-N 14</s0>
<s5>24</s5>
</fC03>
<fC03 i1="24" i2="2" l="FRE"><s0>O 18-O 16</s0>
<s5>25</s5>
</fC03>
<fC03 i1="24" i2="2" l="ENG"><s0>O-18/O-16</s0>
<s5>25</s5>
</fC03>
<fC03 i1="24" i2="2" l="SPA"><s0>O 18-O 16</s0>
<s5>25</s5>
</fC03>
<fC03 i1="25" i2="2" l="FRE"><s0>Gaz effet serre</s0>
<s5>41</s5>
</fC03>
<fC03 i1="25" i2="2" l="ENG"><s0>greenhouse gas</s0>
<s5>41</s5>
</fC03>
<fC03 i1="26" i2="2" l="FRE"><s0>Gaz rare</s0>
<s5>61</s5>
</fC03>
<fC03 i1="26" i2="2" l="ENG"><s0>noble gases</s0>
<s5>61</s5>
</fC03>
<fC03 i1="26" i2="2" l="SPA"><s0>Gás noble</s0>
<s5>61</s5>
</fC03>
<fC03 i1="27" i2="2" l="FRE"><s0>Instrumentation</s0>
<s5>62</s5>
</fC03>
<fC03 i1="27" i2="2" l="ENG"><s0>instruments</s0>
<s5>62</s5>
</fC03>
<fC03 i1="27" i2="2" l="SPA"><s0>Instrumentación</s0>
<s5>62</s5>
</fC03>
<fC07 i1="01" i2="2" l="FRE"><s0>Quaternaire</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="01" i2="2" l="ENG"><s0>Quaternary</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="01" i2="2" l="SPA"><s0>Cuaternario</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="02" i2="2" l="FRE"><s0>Cénozoïque</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="02" i2="2" l="ENG"><s0>Cenozoic</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="02" i2="2" l="SPA"><s0>Cenozoico</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="03" i2="2" l="FRE"><s0>Phanérozoïque</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="03" i2="2" l="ENG"><s0>Phanerozoic</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="03" i2="2" l="SPA"><s0>Fanerozoico</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="04" i2="2" l="FRE"><s0>Weichsélien</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="04" i2="2" l="ENG"><s0>Weichselian</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="04" i2="2" l="SPA"><s0>Weichseliano</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="05" i2="2" l="FRE"><s0>Pléistocène sup</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="05" i2="2" l="ENG"><s0>upper Pleistocene</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="06" i2="2" l="FRE"><s0>Pléistocène</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="06" i2="2" l="ENG"><s0>Pleistocene</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="07" i2="2" l="FRE"><s0>Holocène inf</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="07" i2="2" l="ENG"><s0>lower Holocene</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="07" i2="2" l="SPA"><s0>Holoceno inf</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="08" i2="2" l="FRE"><s0>Holocène</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="08" i2="2" l="ENG"><s0>Holocene</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="08" i2="2" l="SPA"><s0>Holoceno</s0>
<s2>NX</s2>
</fC07>
<fC07 i1="09" i2="2" l="FRE"><s0>Groenland</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="09" i2="2" l="ENG"><s0>Greenland</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="09" i2="2" l="SPA"><s0>Groenlandia</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="10" i2="2" l="FRE"><s0>Arctique</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="10" i2="2" l="ENG"><s0>Arctic region</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="10" i2="2" l="SPA"><s0>Ártico</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="11" i2="2" l="FRE"><s0>Région Polaire</s0>
<s2>564</s2>
</fC07>
<fC07 i1="11" i2="2" l="ENG"><s0>polar regions</s0>
<s2>564</s2>
</fC07>
<fN21><s1>350</s1>
</fN21>
<fN44 i1="01"><s1>PSI</s1>
</fN44>
<fN82><s1>PSI</s1>
</fN82>
</pA>
</standard>
</inist>
<affiliations><list><country><li>Australie</li>
<li>Danemark</li>
<li>France</li>
<li>Nouvelle-Zélande</li>
<li>États-Unis</li>
</country>
</list>
<tree><country name="États-Unis"><noRegion><name sortKey="Petrenko, Vasilii V" sort="Petrenko, Vasilii V" uniqKey="Petrenko V" first="Vasilii V." last="Petrenko">Vasilii V. Petrenko</name>
</noRegion>
<name sortKey="Brook, Edward J" sort="Brook, Edward J" uniqKey="Brook E" first="Edward J." last="Brook">Edward J. Brook</name>
<name sortKey="Harth, Christina M" sort="Harth, Christina M" uniqKey="Harth C" first="Christina M." last="Harth">Christina M. Harth</name>
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   |clé=     Pascal:08-0534498
   |texte=   A novel method for obtaining very large ancient air samples from ablating glacial ice for analyses of methane radiocarbon
}}

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	Serveur d'exploration sur les relations entre la France et l'Australie
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Serveur d'exploration sur les relations entre la France et l'Australie

A novel method for obtaining very large ancient air samples from ablating glacial ice for analyses of methane radiocarbon

A novel method for obtaining very large ancient air samples from ablating glacial ice for analyses of methane radiocarbon

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