A high-precision method for measurement of paleoatmospheric CO2 in small polar ice samples

被引：27

作者：

Ahn, Jinho ^{[1
]}

Brook, Edward J. ^{[1
]}

Howell, Kate ^{[1
]}

机构：

[1] Oregon State Univ, Dept Geosci, Corvallis, OR 97331 USA

来源：

JOURNAL OF GLACIOLOGY | 2009年 / 55卷 / 191期

基金：

美国国家科学基金会;

关键词：

CARBON-DIOXIDE CONCENTRATION; ATMOSPHERIC CO2; TAYLOR DOME; SIPLE DOME; CLIMATE-CHANGE; KYR BP; CORE; AIR; ANTARCTICA; RECORD;

D O I：

10.3189/002214309788816731

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

We describe a high-precision method, now in use in our laboratory, for measuring the CO2 mixing ratio of ancient air trapped in polar ice cores. Occluded air in ice samples weighing similar to 8-15 g is liberated by crushing with steel pins at -35 degrees C and trapped at -263 degrees C in a cryogenic cold trap. CO2 in the extracted air is analyzed using gas chromatography. Replicate measurements for several samples of high-quality ice from the Siple Dome and Taylor Dome Antarctic ice cores have pooled standard deviations of <0.9 ppm. This high-precision technique is directly applicable to high-temporal-resolution studies for detection of small CO2 variations, for example CO2 variations of a few parts per million on millennial to decadal scales.

引用

页码：499 / 506

页数：8

共 42 条

[1] A record of atmospheric CO2 during the last 40,000 years from the Siple Dome, Antarctica ice core -: art. no. D13305 [J].

Ahn, J ;

Wahlen, M ;

Deck, BL ;

Brook, EJ ;

Mayewski, PA ;

Taylor, KC ;

White, JWC .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2004, 109 (D13) :D133051-8

[2] Atmospheric CO2 and climate on millennial time scales during the last glacial period [J].

Ahn, Jinho ;

Brook, Edward J. .

SCIENCE, 2008, 322 (5898) :83-85

[3] Atmospheric CO2 and climate from 65 to 30 ka BP [J].

Ahn, Jinho ;

Brook, Edward J. .

GEOPHYSICAL RESEARCH LETTERS, 2007, 34 (10)

[4] CO2 diffusion in polar ice: observations from naturally formed CO2 spikes in the Siple Dome (Antarctica) ice core [J].

Ahn, Jinho ;

Headly, Melissa ;

Wahlen, Martin ;

Brook, Edward J. ;

Mayewski, Paul A. ;

Taylor, Kendrick C. .

JOURNAL OF GLACIOLOGY, 2008, 54 (187) :685-695

[5] PROCESSES AFFECTING THE CO2 CONCENTRATIONS MEASURED IN GREENLAND ICE [J].

ANKLIN, M ;

BARNOLA, JM ;

SCHWANDER, J ;

STAUFFER, B ;

RAYNAUD, D .

TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY, 1995, 47 (04) :461-470

[6] CO2 record between 40 and 8 kyr BP from the Greenland Ice Core Project ice core [J].

Anklin, M ;

Schwander, J ;

Stauffer, B ;

Tschumi, J ;

Fuchs, A ;

Barnola, JM ;

Raynaud, D .

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1997, 102 (C12) :26539-26545

[7] CO2 EVOLUTION DURING THE LAST MILLENNIUM AS RECORDED BY ANTARCTIC AND GREENLAND ICE [J].

BARNOLA, JM ;

ANKLIN, M ;

PORCHERON, J ;

RAYNAUD, D ;

SCHWANDER, J ;

STAUFFER, B .

TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY, 1995, 47 (1-2) :264-272

[8] ON THE CONCENTRATIONS OF O-2, N-2, AND AR IN TRAPPED GASES FROM ICE CORES [J].

BENDER, M ;

SOWERS, T ;

LIPENKOV, V .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1995, 100 (D9) :18651-18660

[9] POLAR ICE EVIDENCE THAT ATMOSPHERIC CO2 20,000-YR BP WAS 50-PERCENT OF PRESENT [J].

DELMAS, RJ ;

ASCENCIO, JM ;

LEGRAND, M .

NATURE, 1980, 284 (5752) :155-157

[10]

Etheridge D.M., 1988, Ann. Glaciol, V10, P28, DOI DOI 10.3189/S0260305500004110

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