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| Titel |
Footprints of climate in groundwater and precipitation |
| VerfasserIn |
A. Liebminger, G. Haberhauer, W. Papesch, Gerhard Heiss |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 11, no. 2 ; Nr. 11, no. 2 (2007-01-26), S.785-791 |
| Datensatznummer |
250009216
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| Publikation (Nr.) |
 copernicus.org/hess-11-785-2007.pdf |
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| Zusammenfassung |
| In the last decades, the 18O/16O signature of meteoric water
became a key tracer intensively used both in hydrology and in
paleoclimatology, based primarily on the correlation of the
18O/16O ratio in precipitation with temperature. This correlation
with temperature is generally well understood as a result of Rayleigh
processes of atmospheric vapour during the formation of precipitation. The
resulting isotopic signals in precipitation are also transferred into the
groundwater body since the isotopic composition of groundwater is determined
by the precipitation infiltrating into the ground. However, the whole
variability of the 18O/16O ratio especially in temporal data
series of precipitation and groundwater can not be explained with
temperature alone. Here we show that certain interactions between different
climate induced changes in local parameters prevailing during precipitation
events are able to explain a significant part of the observed deviation.
These effects are superimposed by an overall isotopic pattern representing
the large scale climate input primarily based on temperature. The intense
variability of isotopes due to the particular topography of Austria recorded
over a time period of 40 years provides an unique possibility to uncover
this hidden information contributed by relative humidity and type of
precipitation. Since there is a growing need to predict the variation of
climate together with its associated potential hazards like floods and dry
periods the results of this work are contributing to a better overall
understanding of the complex interaction of climate with the corresponding
water cycle. |
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