Change in CO2 concentration and O2/N2 ratio in ice cores due to molecular diffusion

被引：27

作者：

Bereiter, Bernhard ^{[1
,2
]}

Schwander, Jakob ^{[1
,2
]}

Luethi, Dieter ^{[1
,2
]}

Stocker, Thomas F. ^{[1
,2
]}

机构：

[1] Univ Bern, Inst Phys, CH-3012 Bern, Switzerland

[2] Univ Bern, Oeschger Ctr Climate Change Res, Bern, Switzerland

来源：

GEOPHYSICAL RESEARCH LETTERS | 2009年 / 36卷

基金：

瑞士国家科学基金会;

关键词：

AIR-HYDRATE CRYSTAL; PAST 800,000 YEARS; POLAR ICE; ANTARCTICA; NUCLEATION;

D O I：

10.1029/2008GL036737

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Polar ice cores are unique archives for ancient air. However, a loss of air due to molecular diffusion during storage could affect the composition of the remaining air. We formulate a model with a high spatial resolution (1 mm) calculating the loss of N-2, O-2 and CO2 in pure clathrate ice in order to determine which layers of an ice core are affected by significant changes in the CO2 concentration and the delta(O-2/N-2) ratio for storage durations up to 38 years. The results agree with experimental delta(O-2/N-2) measurements at ice core pieces performed after different storage durations. Additionally, the calculations confirm the importance of the storage temperature and show that the CO2 concentration is less affected than that of delta(O-2/N-2). Furthermore, guidelines for ice core sample preparation are provided in dependence of storage duration and temperature. Citation: Bereiter, B., J. Schwander, D. Luthi, and T. F. Stocker (2009), Change in CO2 concentration and O-2/N-2 ratio in ice cores due to molecular diffusion, Geophys. Res. Lett., 36, L05703, doi:10.1029/2008GL036737.

引用

页数：5

共 18 条

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

Ahn, Jinho ;

Brook, Edward J. .

GEOPHYSICAL RESEARCH LETTERS, 2007, 34 (10)

[2] 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

[3] Timing of millennial-scale climate change in Antarctica and Greenland during the last glacial period [J].

Blunier, T ;

Brook, EJ .

SCIENCE, 2001, 291 (5501) :109-112

[4]

Brasseur G., 1999, Atmospheric chemistry and global change

[5]

HONDOH T, 1996, 2 INT C NAT GAS HYDR

[6] Extreme fractionation of gases caused by formation of clathrate hydrates in Vostok Antarctic ice [J].

Ikeda, T ;

Fukazawa, H ;

Mae, S ;

Pepin, L ;

Duval, P ;

Champagnon, B ;

Lipenkov, VY ;

Hondoh, T .

GEOPHYSICAL RESEARCH LETTERS, 1999, 26 (01) :91-94

[7] Mechanism of molecular diffusion in ice crystals [J].

Ikeda-Fukazawa, T ;

Kawamura, K ;

Hondoh, T .

MOLECULAR SIMULATION, 2004, 30 (13-15) :973-979

[8] Effects of molecular diffusion on trapped gas composition in polar ice cores [J].

Ikeda-Fukazawa, T ;

Fukumizu, K ;

Kawamura, K ;

Aoki, S ;

Nakazawa, T ;

Hondoh, T .

EARTH AND PLANETARY SCIENCE LETTERS, 2005, 229 (3-4) :183-192

[9] Orbital and millennial Antarctic climate variability over the past 800,000 years [J].

Jouzel, J. ;

Masson-Delmotte, V. ;

Cattani, O. ;

Dreyfus, G. ;

Falourd, S. ;

Hoffmann, G. ;

Minster, B. ;

Nouet, J. ;

Barnola, J. M. ;

Chappellaz, J. ;

Fischer, H. ;

Gallet, J. C. ;

Johnsen, S. ;

Leuenberger, M. ;

Loulergue, L. ;

Luethi, D. ;

Oerter, H. ;

Parrenin, F. ;

Raisbeck, G. ;

Raynaud, D. ;

Schilt, A. ;

Schwander, J. ;

Selmo, E. ;

Souchez, R. ;

Spahni, R. ;

Stauffer, B. ;

Steffensen, J. P. ;

Stenni, B. ;

Stocker, T. F. ;

Tison, J. L. ;

Werner, M. ;

Wolff, E. W. .

SCIENCE, 2007, 317 (5839) :793-796

[10] Northern Hemisphere forcing of climatic cycles in Antarctica over the past 360,000 years [J].

Kawamura, Kenji ;

Parrenin, Frederic ;

Lisiecki, Lorraine ;

Uemura, Ryu ;

Vimeux, Francoise ;

Severinghaus, Jeffrey P. ;

Hutterli, Manuel A. ;

Nakazawa, Takakiyo ;

Aoki, Shuji ;

Jouzel, Jean ;

Raymo, Maureen E. ;

Matsumoto, Koji ;

Nakata, Hisakazu ;

Motoyama, Hideaki ;

Fujita, Shuji ;

Goto-Azuma, Kumiko ;

Fujii, Yoshiyuki ;

Watanabe, Okitsugu .

NATURE, 2007, 448 (7156) :912-U4

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