Skip to main content Accessibility help
×
Home

Ice Flow Along an I.A.G.P. Flow Line and Interpretation of Data From an Ice Core in Terre Adélie, Antarctica

  • D. Raynaud (a1), C. Lorius (a1), W. F. Budd (a2) and N. W. Young (a1)

Abstract

An ice core has been obtained to the bedrock about 300 m deep in Terre Adélie, 5 km inland from the coast. Stable isotopes and gas content have been measured over the length of the core. The results have been interpreted in terms of the temperature and elevation of origin of the ice further inland on the ice sheet from the data obtained along an 800 km traverse towards Dome “C”, and from Dome “C”, at an elevation of about 3 200 m. The flow of the ice from Dome “C“ to the coast has been modelled to determine the ages and particle trajectories of the ice for present conditions.

It has been found that the upper isotope and gas-content values in the core can be matched with the present regime using a base for ice flow above the present bed which is suggested by moraine in the ice core. The ice in the layer from the 200 m depth, where the age is apparently more than 5 000 years, to the 250 m depth, appears to have originated from conditions which differ substantially from those existing on the present inland ice-sheet surface. The results give an indication of a colder climate and greater ice-sheet thickness in the past.

Résumé

Ecoulement de la glace It long d’un profit I.A.G.P. et interprétation des données mesurés le long d’un carottage en Terre Adélie, Antarctique. La composition isotopiquc et la teneur en gaz de la glace ont été mesureécs le long d’un carottage de 300 m, effectue en zone côtiére de Terre Adélie (distance a la côte: 5 km) et qui a atteint le socle rocheux. Les résultats ont été interprétés en terme de temperature et d’altitude du site d’origine de la glace en amont du site de forage a partir des données obtcnucs le long d’un parcours de 800 km entre la cdte et Dome “C” (altitude: 3 200 m). L’écoulement dc la glace entre le Dome “C“ et la côte a etc modélise afin dc determiner les ages et les trajectoires dc la glace dans les conditions actuelles.

On montrc que la partie supérieure des profils en gaz ct isotopique mesurés le long du carottage peuvent être en accord avec le regime actuel a condition d’utiliser comme base de I’écoulement un niveau au-dessus du lit. Une telle base est suggérée par la presence de debris morainiques dans la carotte. En dessous d’environ 200 m, niveau auquel Page est apparemment supérieur a 5 000 ans, et jusqu’a 250 m on montre que la glace s’est formée sous des conditions différentes de celles actuelles, indiquant un climat plus froid et des épaisseurs de glace plus importantes dans le passé.

Zusammenfassung

Eisfluss längs einer I.A.G.P.-Stromlinie und Interpretation der Daten von einem Eis-Bohrkern in Terre Adélie, Antarktis. In Terre Adélie wurde 5 km landeinwärts ein Eiskern bis zum etwa 300 m tiefen Felsbett erbohrt. Über die ganze Lange des Kerns wurden stabile Isotopen und Gasgchalt gemessen. Die Ergebnisse wurden hinsichtlich der Temperatur und der Ursprungshöhe des Eises von weiter landeinwärts gelegenen Teilen des Eisschildes interpretiert; die Ausgangsdaten hierfür wurden langs einer 800 km langen Traverse zum Dom “C“ und von dort bis zu einrr Meereshöhe von etwa 3 200 m gewonnen. Fur den Fluss den Eises vom Dom “C“ zur Kuste wurde ein Modell entwickelt, um das Alter und die Partikelbahnen des Eises unter derzeitigen Verhältnissen bestimmen zu konnen.

Es zeigte sich, dass der Isotopen- und Gasgehalt im obcren Teil des Kerns dem derzeitigen Zustand angepasst werden kann, wenn man von einem Eisfluss über dem heutigen Belt ausgeht, wie ihn der Gehalt an Moräne in dem Eiskern nahelegt. Das Eis in der Schicht von 200 m, wo das Eis sichtlich alter als 5 000 Jahre ist, bis 250 m Tiefe scheint unter Verhältnissen entstanden zu sein, die wesentlich von denen abweichen, die heute auf der Oberfläche des Eisschildes herrschen. Die Ergebnisse weisen auf ein kälteres Klima und cine grössere Mächtigkeit des Eisschildes in der Vergangenheit hin.

  • View HTML
    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Ice Flow Along an I.A.G.P. Flow Line and Interpretation of Data From an Ice Core in Terre Adélie, Antarctica
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Ice Flow Along an I.A.G.P. Flow Line and Interpretation of Data From an Ice Core in Terre Adélie, Antarctica
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Ice Flow Along an I.A.G.P. Flow Line and Interpretation of Data From an Ice Core in Terre Adélie, Antarctica
      Available formats
      ×

Copyright

References

Hide All
Anonymous. 1971. International Antarctic Glaciological Project. Polar Record, Vol. 15, No, 98, p. 829-33.
Barkov, N. I., and others. 1977. The isotope analysis of ice cores from Vostok Station (Antarctica) to the depth of 950 m, [by] Barkov, N. I., Korotkevich, Ye. S., Gordiyenko, F. G., and Kotlyakov, V. M., [Union Géodésique et Géophysique Internationale. Association Internationale des Sciences Hydrologiques. Commission des Neiges et Glaces.] Symposium. Isotopes et impuretés dans les neiges et places. Actes du colloque de Grenoble, aoüt/septembre 197^, p. 382-87. (IAHS-AISH Publication No. 118.)
Boutron, C., and Lorius, C. 1977. Trace elements content in East Antarctica snow samples. [Union Géodésique et Géophysique Internationale. Association Internationale des Sciences Hydrologiques. Commission des Neiges et Glaces Symposium. Isotopes it impuretés dans Its neiges et glares. Actes du colloque de Grenoble, aoüt/septembre 1975, p. 164-71. [AIHS-AISH Publication No. 118)
Budd, W. F., and Morgan, V. I. 1977. Isotopes, climate.; and ice sheet dynamics from core studies on Law Dome, Antarctica. [Union Géodésique et Géophysique Internationale. Association Internationale. des Sciences Hydrologiques. Commission des Neiges et Glaces.] Symposium. Isotopes et impuretés duns Us neiges el glaces, Actes du colloque de Grenoble, aoüt/septembre 197*, p. 312-21. (IAHS-AISH Publication No. 118.)
Budd, W. F., and others. 1971. Derived physical characteristics of the Antarctic ice sheet, by Budd, W. F., Jenssen, D., and Radok, U. ANARE Interim Reports. Ser. A(IV). Glaciology. Publication No. 1 so.
Budd, W. F., and others. 1976. Measured and computed temperature distributions in the Law Dome ire cap, Antarctica, by Budd, W. F., Young, N. W., and Austin, C. R., Journal of Glaciology, Vol, 16, No, 74, p. 99-110.
Dansgaard, W., and others. 1973. Stable isotope glaciology, by Dansgaard, W., Johnsen, S. J., Clausen, H. B., and Gundestrup, N. Meddelelser om Grmland, Bd. 197, Nr. 2.
Drewry, D. J. 1975. Radio echo sounding map of Antarctica, (∼90° E-180ΰ). Polar Record, Vol. 17, No. 109, P. 359-74.
Gillet, F., and others. [1976.] A new electrothermal drill for coring in ice, by Gillet, F., Donnou, D., Ricou, G. (In Splettstoesser, J. F., ed. Ice-core drilling. Proceedings of a symposium, University of Nebraska, Lincoln, 28-30 August 1974. Lincoln, London, University of Nebraska Press, p. 19-27.)
Jenssen, D. In press. Elevation and climatic changes from total gas content and stable isotopic measurements.
Lambert, G., and others. 1977. Accumulation of snow and radioactive debris in Antarctica: a possible refined radiochronology beyond reference levels, [by] Lambert, G., Ardouin, B., Sanak, J., Lorius, C., and Pourchet, M. [Union Géodésique et Géophysique Internationale. Association Internationale des Sciences Hydrologiques. Commission des Neiges et Glaces.] Symposium. Isotopes et impuretés dans les neiges et glaces. Actes du colloque de Grenoble, aoüt/septembre 1975 , P. 146-58. (IAHS-AISH Publication No. 118.)
Lorius, C., and Merlivat, L. 1977. Distribution of mean surface stable isotopes in East Antarctica: observed changes with depth in the coastal area. [Union Géodésique et Géophysique Internationale. Association Internationale des Sciences Hydrologiques. Commission des Neiges et Glaces.] Symposium. Isotopes et impuretés dans Us neiges et glaces. Actes du colloque de Grenoble, aoüt/septembre 1975, p. 127-37. (IAHS-AISH Publication No. 118.)
Lorius, C., and others. In press. Climatic changes in Antarctica during the last 30,000 years, by Lorius, C., Merlivat, J., Jouzel, J., and Pourchet, M. [Paper presented at International Conference on Evolution of Planetary Atmospheres and Climatology of the Earth, Nice, October 1978.]
Merlivat, L., and others. 1977. Distribution of artificial tritium in firn samples from East Antarctica, [by] Merlivat, L., Jouzel, J., Robert, J., and Lorius, C. [Union Géodésique et Géophysique Internationale. Association Inter-nationale des Sciences Hydrologiques. Commission des Neiges et Glaces.] Symposium. Isotopes et impuretés dans Us neiges et glaces. Actes du colloque de Grenoble, aoüt/septembre 1575, p. 138-45. (IAHS-AISH Publication No. 118.)
Radok, U. 1977. International Antarctic Glaciological Project: past and future. Antarctic Journal of the United States, Vol. 12, Nos. 1-2, p . 32-38.
Radok, U., and others. 1970. Steady-slate temperature profiles in ice sheets, by Radok, U., Jenssen, D., and Budd, W. [F.]. [Union Géodésique et Géophysique Internationale. Association Internationale d’Hydrologie Scientifique.] [International Council of Scientific Unions. Scientific Committee on Antarctic Research. International Association of Scientific Hydrology, Commission of Snow and Ice.] International Symposium on Antarctic Glaciological Exploration (ISAGE), Hanover, New Hampshire, U.S.A., 3-7 September 1968, p. 151-65. [(Publication No. 86 [de I’Association Internationale d’Hydrologie Scientifique].)]
Raynaud, D. 1977. I*> inclusions gazeusos dans la dace dc glacier, leur utilisation comme indicatcur du site de formation de la glace polaire, applications climatiques et rhéologiques. Publications du Laboraloire de Glaciologie du CNRS, No, 314.
Raynaud, D., and Lorius, C. 1973. Climatic implications of total gas content in ice at Camp Century. Nature, Vol. 243, No. 5405, p. 283-64.
Raynaud, D., and Lorius, C. 1977. Total gas content in polar ice: Theological and climatic implications. [Union Géodésique et Géophysique Internationale. Association Internationale des Sciences Hydrologiques. Commission des Neiges et Glaces.] Symposium, Isotopes et impuretés dans Us neiges et glaces. Actes du colloque de Grenoble, aoüt|septembre 1975, p. 326-35. (IAHS-AISH Publication No. 118.)
Raynaud, D., and others. In press. Crystal size and total gas content of ice, two indicators of the climatic evolution of the polar ice sheets, by Raynaud, D., Duval, P., Lebcl, B., and Lorius, C. [Paper presented at International Conference on Evolution of Planetary Atmospheres and Climatology of the Earth, Nice, October 1978.]
Robin, G. de, Q. 1975. Radio-echo sounding of the Antarctic ice sheet. Antarctic Journal of the Untied Slates, Vol. 10, No. 4, p. 157-59.
Robin, G. de Q. 1977. Ice cores and climatic change. Philosophical Transactions of the Royal Society of London, Ser. B, Vol. 280, No. 972, p. 143-68.
Robin, G. de Q., and others. 1977. International studies of ice sheet and bedrock, by de Q. Robin, G., Drcwry, D. J., arid Meldrum, D. T. Philosophical Transactions of the Royal Society of London, Ser. B, Vol. 379, No. 963, p. 185-96.
Steed, R. H. N., and Drewry, D. J. In press. Radio echo sounding of Wilkes Land, Antarctica. (In Craddock, C., ed. Antarctic geosciencc. Proceedings of the third Symposium on Antarctic Geology and Geophysics, Madison, 22-27 August, 1977. Madison, University of Wisconsin Press.)

Ice Flow Along an I.A.G.P. Flow Line and Interpretation of Data From an Ice Core in Terre Adélie, Antarctica

  • D. Raynaud (a1), C. Lorius (a1), W. F. Budd (a2) and N. W. Young (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed