Seasonal deuterium excess in a Tien Shan ice core: Influence of moisture transport and recycling in Central Asia
[1] Stable water isotope (d18O, dD) data from a high elevation (5100 masl) ice core recovered from the Tien Shan Mountains, Kyrgyzstan, display a seasonal cycle in deuterium excess (d = dD 8*d18O) related to changes in the regional hydrologic cycle during 1994–2000. While there is a strong correlati...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.530.9592 2023-05-15T16:38:30+02:00 Seasonal deuterium excess in a Tien Shan ice core: Influence of moisture transport and recycling in Central Asia The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.530.9592 http://www.ccrc.sr.unh.edu/~cpw/papers/Kreutz_GRL2003.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.530.9592 http://www.ccrc.sr.unh.edu/~cpw/papers/Kreutz_GRL2003.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.ccrc.sr.unh.edu/~cpw/papers/Kreutz_GRL2003.pdf text ftciteseerx 2016-01-08T10:36:28Z [1] Stable water isotope (d18O, dD) data from a high elevation (5100 masl) ice core recovered from the Tien Shan Mountains, Kyrgyzstan, display a seasonal cycle in deuterium excess (d = dD 8*d18O) related to changes in the regional hydrologic cycle during 1994–2000. While there is a strong correlation (r2 = 0.98) between d18O 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 15–20%. 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. INDEX TERMS: 1620 Global Change: Text ice core Unknown |
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English |
description |
[1] Stable water isotope (d18O, dD) data from a high elevation (5100 masl) ice core recovered from the Tien Shan Mountains, Kyrgyzstan, display a seasonal cycle in deuterium excess (d = dD 8*d18O) related to changes in the regional hydrologic cycle during 1994–2000. While there is a strong correlation (r2 = 0.98) between d18O 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 15–20%. 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. INDEX TERMS: 1620 Global Change: |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
title |
Seasonal deuterium excess in a Tien Shan ice core: Influence of moisture transport and recycling in Central Asia |
spellingShingle |
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 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.530.9592 http://www.ccrc.sr.unh.edu/~cpw/papers/Kreutz_GRL2003.pdf |
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ice core |
genre_facet |
ice core |
op_source |
http://www.ccrc.sr.unh.edu/~cpw/papers/Kreutz_GRL2003.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.530.9592 http://www.ccrc.sr.unh.edu/~cpw/papers/Kreutz_GRL2003.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766028784333488128 |