Seasonal Deuterium Excess in a Tien Shan Ice Core: Influence of Moisture Transport and Recycling in Central Asia
Stable water isotope (delta(18)O, deltaD) data from a high elevation (5100 masl) ice core recovered from the Tien Shan Mountains, Kyrgyzstan, display a seasonal cycle in deuterium excess (d = deltaD - 8* delta(18)O) related to changes in the regional hydrologic cycle during 1994 - 2000. While there...
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ftmaineuniv:oai:digitalcommons.library.umaine.edu:ers_facpub-1078 2024-09-15T18:11:50+00:00 Seasonal Deuterium Excess in a Tien Shan Ice Core: Influence of Moisture Transport and Recycling in Central Asia Kreutz, Karl J. Wake, Cameron P. Aizen, Vladimir B. Cecil, L. DeWayne Synal, Hans-Arno 2003-09-17T07:00:00Z application/pdf https://digitalcommons.library.umaine.edu/ers_facpub/79 https://doi.org/10.1029/2003GL017896 https://digitalcommons.library.umaine.edu/context/ers_facpub/article/1078/viewcontent/kreutz_30_2003GL017896.pdf unknown DigitalCommons@UMaine https://digitalcommons.library.umaine.edu/ers_facpub/79 doi:10.1029/2003GL017896 https://digitalcommons.library.umaine.edu/context/ers_facpub/article/1078/viewcontent/kreutz_30_2003GL017896.pdf This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). Earth Science Faculty Scholarship Earth Sciences text 2003 ftmaineuniv https://doi.org/10.1029/2003GL017896 2024-07-24T05:38:40Z Stable water isotope (delta(18)O, deltaD) data from a high elevation (5100 masl) ice core recovered from the Tien Shan Mountains, Kyrgyzstan, display a seasonal cycle in deuterium excess (d = deltaD - 8* delta(18)O) related to changes in the regional hydrologic cycle during 1994 - 2000. While there is a strong correlation (r(2) = 0.98) between delta(18)O and dD in the ice core samples, the regression slope (6.9) and mean d value (23.0) are significantly different than the global meteoric water line values. The resulting time-series ice core d profile contains distinct winter maxima and summer minima, with a yearly d amplitude of similar to 15 - 20parts per thousand. Local-scale processes that may affect d values preserved in the ice core are not consistent with the observed seasonal variability. Data from Central Asian monitoring sites in the Global Network of Isotopes in Precipitation (GNIP) have similar seasonal d changes. We suggest that regional-scale hydrological conditions, including seasonal changes in moisture source, transport, and recycling in the Caspian/ Aral Sea region, are responsible for the observed spatial and temporal d variability. Text ice core The University of Maine: DigitalCommons@UMaine Geophysical Research Letters 30 18 |
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The University of Maine: DigitalCommons@UMaine |
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Earth Sciences |
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Earth Sciences Kreutz, Karl J. Wake, Cameron P. Aizen, Vladimir B. Cecil, L. DeWayne Synal, Hans-Arno Seasonal Deuterium Excess in a Tien Shan Ice Core: Influence of Moisture Transport and Recycling in Central Asia |
topic_facet |
Earth Sciences |
description |
Stable water isotope (delta(18)O, deltaD) data from a high elevation (5100 masl) ice core recovered from the Tien Shan Mountains, Kyrgyzstan, display a seasonal cycle in deuterium excess (d = deltaD - 8* delta(18)O) related to changes in the regional hydrologic cycle during 1994 - 2000. While there is a strong correlation (r(2) = 0.98) between delta(18)O and dD in the ice core samples, the regression slope (6.9) and mean d value (23.0) are significantly different than the global meteoric water line values. The resulting time-series ice core d profile contains distinct winter maxima and summer minima, with a yearly d amplitude of similar to 15 - 20parts per thousand. Local-scale processes that may affect d values preserved in the ice core are not consistent with the observed seasonal variability. Data from Central Asian monitoring sites in the Global Network of Isotopes in Precipitation (GNIP) have similar seasonal d changes. We suggest that regional-scale hydrological conditions, including seasonal changes in moisture source, transport, and recycling in the Caspian/ Aral Sea region, are responsible for the observed spatial and temporal d variability. |
format |
Text |
author |
Kreutz, Karl J. Wake, Cameron P. Aizen, Vladimir B. Cecil, L. DeWayne Synal, Hans-Arno |
author_facet |
Kreutz, Karl J. Wake, Cameron P. Aizen, Vladimir B. Cecil, L. DeWayne Synal, Hans-Arno |
author_sort |
Kreutz, Karl J. |
title |
Seasonal Deuterium Excess in a Tien Shan Ice Core: Influence of Moisture Transport and Recycling in Central Asia |
title_short |
Seasonal Deuterium Excess in a Tien Shan Ice Core: Influence of Moisture Transport and Recycling in Central Asia |
title_full |
Seasonal Deuterium Excess in a Tien Shan Ice Core: Influence of Moisture Transport and Recycling in Central Asia |
title_fullStr |
Seasonal Deuterium Excess in a Tien Shan Ice Core: Influence of Moisture Transport and Recycling in Central Asia |
title_full_unstemmed |
Seasonal Deuterium Excess in a Tien Shan Ice Core: Influence of Moisture Transport and Recycling in Central Asia |
title_sort |
seasonal deuterium excess in a tien shan ice core: influence of moisture transport and recycling in central asia |
publisher |
DigitalCommons@UMaine |
publishDate |
2003 |
url |
https://digitalcommons.library.umaine.edu/ers_facpub/79 https://doi.org/10.1029/2003GL017896 https://digitalcommons.library.umaine.edu/context/ers_facpub/article/1078/viewcontent/kreutz_30_2003GL017896.pdf |
genre |
ice core |
genre_facet |
ice core |
op_source |
Earth Science Faculty Scholarship |
op_relation |
https://digitalcommons.library.umaine.edu/ers_facpub/79 doi:10.1029/2003GL017896 https://digitalcommons.library.umaine.edu/context/ers_facpub/article/1078/viewcontent/kreutz_30_2003GL017896.pdf |
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This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). |
op_doi |
https://doi.org/10.1029/2003GL017896 |
container_title |
Geophysical Research Letters |
container_volume |
30 |
container_issue |
18 |
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1810449412116185088 |