Stable Isotope Records from Mount Logan, Eclipse Ice Cores and Nearby Jellybean Lake. Water Cycle of the North Pacific Over 2000 Years and Over Five Vertical Kilometres: Sudden Shifts and Tropical Connections
Three ice cores recovered on or near Mount Logan, together with a nearby lake record (Jellybean Lake), cover variously 500 to 30 000 years. This suite of records offers a unique view of the lapse rate in stable isotopes from the lower to upper troposphere. The region is climatologically important, b...
Published in: | Géographie physique et Quaternaire |
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2004
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Online Access: | http://id.erudit.org/iderudit/013147ar https://doi.org/10.7202/013147ar |
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fterudit:oai:erudit.org:013147ar 2023-05-15T13:15:09+02:00 Stable Isotope Records from Mount Logan, Eclipse Ice Cores and Nearby Jellybean Lake. Water Cycle of the North Pacific Over 2000 Years and Over Five Vertical Kilometres: Sudden Shifts and Tropical Connections Fisher, D. A. Wake, C. Kreutz, K. Yalcin, K. Steig, E. Mayewski, P. Anderson, L. Zheng, J. Rupper, S. Zdanowicz, C. Demuth, M. Waszkiewicz, M. Dahl-Jensen, D. Goto-Azuma, K. Bourgeois, J. B. Koerner, R. M. Sekerka, J. Osterberg, E. Abbott, M. B. Finney, B. P. Burns, S. J. 2004 http://id.erudit.org/iderudit/013147ar https://doi.org/10.7202/013147ar en eng Les Presses de l'Université de Montréal Érudit Géographie physique et Quaternaire vol. 58 no. 2-3 (2004) http://id.erudit.org/iderudit/013147ar doi:10.7202/013147ar Tous droits réservés © Les Presses de l'Université de Montréal, 2006 text 2004 fterudit https://doi.org/10.7202/013147ar 2022-09-24T23:12:51Z Three ice cores recovered on or near Mount Logan, together with a nearby lake record (Jellybean Lake), cover variously 500 to 30 000 years. This suite of records offers a unique view of the lapse rate in stable isotopes from the lower to upper troposphere. The region is climatologically important, being beside the Cordilleran pinning-point of the Rossby Wave system and the Aleutian Low. Comparison of stable isotope series over the last 2000 years and model simulations suggest sudden and persistent shifts between modern (mixed) and zonal flow regimes of water vapour transport to the Pacific Northwest. The last such shift was in A.D. 1840. Model simulations for modern and “pure” zonal flow suggest that these shifts are consistent regime changes between these flow types, with predominantly zonal flow prior to ca. A.D. 1840 and modern thereafter. The 5.4 and 0.8 km asl records show a shift at A.D. 1840 and another at A.D. 800. It is speculated that the A.D. 1840 regime shift coincided with the end of the Little Ice Age and the A.D. 800 shift with the beginning of the European Medieval Warm Period. The shifts are very abrupt, taking only a few years at most. Trois carottes de glace prélevées à proximité du mont Logan, combinées à une coupe stratigraphique du lac Jellybean, couvrent une période comprise entre 500 et 30 000 ans. Elles renseignent sur les taux de changement de la composition isotopique de la troposphère. La région étudiée est importante au niveau climatologique puisqu’elle est au point de convergence des ondes de Rossby et de la dépression des Aléoutiennes. La comparaison entre la composition isotopique depuis 2000 ans et les résultats des simulations suggère des changements brusques et persistants entre les régimes de transport de vapeur d’eau modernes et zonaux dans le nord-est du Pacifique, où le dernier changement s’est produit en 1840 de notre ère. Les simulations indiquent que les changements de flux correspondent aux changements de régime, avec un flux zonal avant ca 1840 pour passer au type ... Text aleutian low Dépression des Aléoutiennes Érudit.org (Université Montréal) Pacific Mount Logan ENVELOPE(-140.405,-140.405,60.567,60.567) Géographie physique et Quaternaire 58 2-3 337 352 |
institution |
Open Polar |
collection |
Érudit.org (Université Montréal) |
op_collection_id |
fterudit |
language |
English |
description |
Three ice cores recovered on or near Mount Logan, together with a nearby lake record (Jellybean Lake), cover variously 500 to 30 000 years. This suite of records offers a unique view of the lapse rate in stable isotopes from the lower to upper troposphere. The region is climatologically important, being beside the Cordilleran pinning-point of the Rossby Wave system and the Aleutian Low. Comparison of stable isotope series over the last 2000 years and model simulations suggest sudden and persistent shifts between modern (mixed) and zonal flow regimes of water vapour transport to the Pacific Northwest. The last such shift was in A.D. 1840. Model simulations for modern and “pure” zonal flow suggest that these shifts are consistent regime changes between these flow types, with predominantly zonal flow prior to ca. A.D. 1840 and modern thereafter. The 5.4 and 0.8 km asl records show a shift at A.D. 1840 and another at A.D. 800. It is speculated that the A.D. 1840 regime shift coincided with the end of the Little Ice Age and the A.D. 800 shift with the beginning of the European Medieval Warm Period. The shifts are very abrupt, taking only a few years at most. Trois carottes de glace prélevées à proximité du mont Logan, combinées à une coupe stratigraphique du lac Jellybean, couvrent une période comprise entre 500 et 30 000 ans. Elles renseignent sur les taux de changement de la composition isotopique de la troposphère. La région étudiée est importante au niveau climatologique puisqu’elle est au point de convergence des ondes de Rossby et de la dépression des Aléoutiennes. La comparaison entre la composition isotopique depuis 2000 ans et les résultats des simulations suggère des changements brusques et persistants entre les régimes de transport de vapeur d’eau modernes et zonaux dans le nord-est du Pacifique, où le dernier changement s’est produit en 1840 de notre ère. Les simulations indiquent que les changements de flux correspondent aux changements de régime, avec un flux zonal avant ca 1840 pour passer au type ... |
format |
Text |
author |
Fisher, D. A. Wake, C. Kreutz, K. Yalcin, K. Steig, E. Mayewski, P. Anderson, L. Zheng, J. Rupper, S. Zdanowicz, C. Demuth, M. Waszkiewicz, M. Dahl-Jensen, D. Goto-Azuma, K. Bourgeois, J. B. Koerner, R. M. Sekerka, J. Osterberg, E. Abbott, M. B. Finney, B. P. Burns, S. J. |
spellingShingle |
Fisher, D. A. Wake, C. Kreutz, K. Yalcin, K. Steig, E. Mayewski, P. Anderson, L. Zheng, J. Rupper, S. Zdanowicz, C. Demuth, M. Waszkiewicz, M. Dahl-Jensen, D. Goto-Azuma, K. Bourgeois, J. B. Koerner, R. M. Sekerka, J. Osterberg, E. Abbott, M. B. Finney, B. P. Burns, S. J. Stable Isotope Records from Mount Logan, Eclipse Ice Cores and Nearby Jellybean Lake. Water Cycle of the North Pacific Over 2000 Years and Over Five Vertical Kilometres: Sudden Shifts and Tropical Connections |
author_facet |
Fisher, D. A. Wake, C. Kreutz, K. Yalcin, K. Steig, E. Mayewski, P. Anderson, L. Zheng, J. Rupper, S. Zdanowicz, C. Demuth, M. Waszkiewicz, M. Dahl-Jensen, D. Goto-Azuma, K. Bourgeois, J. B. Koerner, R. M. Sekerka, J. Osterberg, E. Abbott, M. B. Finney, B. P. Burns, S. J. |
author_sort |
Fisher, D. A. |
title |
Stable Isotope Records from Mount Logan, Eclipse Ice Cores and Nearby Jellybean Lake. Water Cycle of the North Pacific Over 2000 Years and Over Five Vertical Kilometres: Sudden Shifts and Tropical Connections |
title_short |
Stable Isotope Records from Mount Logan, Eclipse Ice Cores and Nearby Jellybean Lake. Water Cycle of the North Pacific Over 2000 Years and Over Five Vertical Kilometres: Sudden Shifts and Tropical Connections |
title_full |
Stable Isotope Records from Mount Logan, Eclipse Ice Cores and Nearby Jellybean Lake. Water Cycle of the North Pacific Over 2000 Years and Over Five Vertical Kilometres: Sudden Shifts and Tropical Connections |
title_fullStr |
Stable Isotope Records from Mount Logan, Eclipse Ice Cores and Nearby Jellybean Lake. Water Cycle of the North Pacific Over 2000 Years and Over Five Vertical Kilometres: Sudden Shifts and Tropical Connections |
title_full_unstemmed |
Stable Isotope Records from Mount Logan, Eclipse Ice Cores and Nearby Jellybean Lake. Water Cycle of the North Pacific Over 2000 Years and Over Five Vertical Kilometres: Sudden Shifts and Tropical Connections |
title_sort |
stable isotope records from mount logan, eclipse ice cores and nearby jellybean lake. water cycle of the north pacific over 2000 years and over five vertical kilometres: sudden shifts and tropical connections |
publisher |
Les Presses de l'Université de Montréal |
publishDate |
2004 |
url |
http://id.erudit.org/iderudit/013147ar https://doi.org/10.7202/013147ar |
long_lat |
ENVELOPE(-140.405,-140.405,60.567,60.567) |
geographic |
Pacific Mount Logan |
geographic_facet |
Pacific Mount Logan |
genre |
aleutian low Dépression des Aléoutiennes |
genre_facet |
aleutian low Dépression des Aléoutiennes |
op_relation |
Géographie physique et Quaternaire vol. 58 no. 2-3 (2004) http://id.erudit.org/iderudit/013147ar doi:10.7202/013147ar |
op_rights |
Tous droits réservés © Les Presses de l'Université de Montréal, 2006 |
op_doi |
https://doi.org/10.7202/013147ar |
container_title |
Géographie physique et Quaternaire |
container_volume |
58 |
container_issue |
2-3 |
container_start_page |
337 |
op_container_end_page |
352 |
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1766267173200723968 |