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| Titel |
Stable isotope (²H, ¹⁷O, ¹⁸O) and hydro chemical patterns of precipitation collected in weekly resolution at Hannover, Germany |
| VerfasserIn |
Paul Koeniger, Thomas Himmelsbach |
| 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 |
250136486
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| Publikation (Nr.) |
 EGU/EGU2016-17530.pdf |
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| Zusammenfassung |
| Long-term observations of stable isotopes (δ18O and δ2H) in precipitation were initiated in
May 2008 at the Federal Institute of Geosciences and Natural Resources (BGR) in Hannover,
Germany. In 2014 all precipitation samples were re-analyzed because a purchase of a new
laser spectrometer (Picarro L2140-i) now allowed measurements of δ17O and a calculation of
the 17O-excess parameter. Starting in October 2015 a routine analysis of hydro chemical
parameters was added whenever enough sample aliquot was available (major ions, trace
elements).
A discussion of the stable isotope data of the seven year series of weekly precipitation
samples (n = 370) will be presented. Beneath general patterns (seasonality and trends) we
also focus on importance of amount weighing procedures, corrections for minor rain
amounts, aspects of sample storage and re-analyzes, as well as impacts through
changes in analytical equipment (IRMS, CRD spectroscopy) which is visible from the
data.
For stable isotopes a Thermo Fisher delta plus IRMS (Gasbench and H-Device) was used
until 2011 and from 2012 on a Picarro L2120-i water vapor analyzer with long-term
accuracies for quality check samples better than 0.2‰ and 0.8‰ for δ18O and δ2H,
respectively. |
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