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| Titel |
Impact of moisture source regions on the isotopic composition of precipitation events at high-mountain continental site Kasprowy Wierch, southern Poland |
| VerfasserIn |
Kazimierz Różański, Lukasz Chmura, Marek Dulinski |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250127094
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| Publikation (Nr.) |
 EGU/EGU2016-6918.pdf |
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| Zusammenfassung |
| Five-year record of deuterium and oxygen-18 isotope composition of precipitation events
collected on top of the Kasprowy Wierch mountain (49˚ 14’N, 19˚ 59’E, 1989 m a.s.l.)
located in north-western High Tatra mountain ridge, southern Poland, is presented and
discussed. In total 670 precipitation samples have been collected and analysed. Stable isotope
composition of the analysed precipitation events varied in a wide range, from -2.9 to
-26.6‰ for δ18O and from -7 to -195 ‰ for δ2H. The local meteoric water line (LMWL)
defined by single events data (δ2H=(7.86±0.05)δ18O+(12.9±0.6) deviate significantly from
the analogous line defined by monthly composite precipitation data available for IAEA/GNIP
station Krakow-Balice (50o04’N, 19o55’E, 220 m a.s.l.), located ca. 100 km north of
Kasprowy Wierch ((δ2H=(7.82±0.11)δ18O+(6.9±1.1). While slopes of those two LMWLs
are statistically indistinguishable, the intercept of Kasprowy Wierch line is almost two times
higher that that characterizing Krakow monthly precipitation. This is well-documented effect
associated with much higher elevation of Kasprowy Wierch sampling site when compared to
Krakow. The isotope data for Kasprowy Wierch correlate significantly with air
temperature, with the slope of the regression line being equal 0.35±0.02 ‰oC
for δ18O, whereas no significant correlation with precipitation amount could be
established.
The impact of moisture source regions on the isotopic composition of precipitation events
collected at Kasprowy Wierch site was analysed using HYSPLITE back trajectory model.
Five-days back trajectories were calculated for all analysed precipitation events and seasonal
maps of trajectory distribution were produced. They illustrate changes in the prevailing
transport patterns of air masses bringing precipitation to the sampling site. Back trajectories
for the events yielding extreme isotopic composition of precipitation collected at Kasprowy
Wierch were analyzed in detail.
Acknowledgements. Financial support of this work through Ministry of Science and
Higher Education (statutory funds of AGH University od Science and Technology, project
No.11.11.220.01) is kindly acknowledged. |
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