001     202655
005     20220930130044.0
020 _ _ |a 978-3-95806-061-6
024 7 _ |2 URN
|a urn:nbn:de:0001-2015071629
024 7 _ |2 Handle
|a 2128/9009
024 7 _ |2 ISSN
|a 1866-1793
037 _ _ |a FZJ-2015-04845
041 _ _ |a English
100 1 _ |0 P:(DE-Juel1)144570
|a Gangi, Laura
|b 0
|e Corresponding author
|g female
|u fzj
245 _ _ |a Real-time quantification of oxygen isotope exchange between carbon dioxide and leaf /soil water in terrestrial ecosystems with laser-based spectroscopy
|f 2015-05-31
260 _ _ |a Jülich
|b Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
|c 2015
300 _ _ |a XX, 156 S.
336 7 _ |0 PUB:(DE-HGF)11
|2 PUB:(DE-HGF)
|a Dissertation / PhD Thesis
|b phd
|m phd
|s 1438323490_1376
336 7 _ |0 PUB:(DE-HGF)3
|2 PUB:(DE-HGF)
|a Book
|m book
336 7 _ |0 2
|2 EndNote
|a Thesis
336 7 _ |2 DRIVER
|a doctoralThesis
336 7 _ |2 BibTeX
|a PHDTHESIS
336 7 _ |2 DataCite
|a Output Types/Dissertation
336 7 _ |2 ORCID
|a DISSERTATION
490 0 _ |a Schriften des Forschungszentrums Jülich Reihe Energie & Umwelt / Energy & Environment
|v 266
502 _ _ |a Universität Bonn, Diss., 2015
|b Dr.
|c Universität Bonn
|d 2015
520 _ _ |a The oxygen isotope ratio of atmospheric carbon dioxide ($\delta^{18}$O-CO$_{2}$) can be used to partition thegross fluxes of CO$_{2}$ in terrestrial ecosystems, such as soil respiration and plant assimilation, asa characteristic $\delta^{18}$O value is transferred to CO$_{2}$ during isotopic equilibration with differentwater pools. However, the quantitative use of $\delta^{18}$O-CO$_{2}$ requires a detailed understanding of the different processes and factors that influence the CO$_{2}$–H$_{2}$O oxygen isotope exchange atdifferent scales. The effect of varying environmental conditions on the $^{18}$O-exchange between atmospheric CO$_{2}$ and the leaf water of different plant species has been insufficiently explored in experiments, and also the $\delta^{18}$O of soil efflux is fraught with uncertainty due to the complex influence of soil water content (SWC), soil texture and tortuosity, as well as the catalytic activity of the enzyme carbonic anhydrase (CA). The aim of the present study was to elucidate the $^{18}$O-exchange between CO$_{2}$ and leaf/soil water under controlled laboratory conditions and at a hightemporal resolution. For this purpose, $\delta^{18}$O of CO$_{2}$ and water vapor were measured online using infrared laser spectroscopy in plant chamber experiments with spruce, wheat, poplar and maize, as well as soil column experiments, which included the use of gas-permeable tubing. Finally, the biophysical soil–vegetation–atmosphere model MuSICA was applied to simulate the $^{18}$O-exchange at the ecosystem level and to test whether a value for the degree of isotopic equilibrium ($\theta$) obtained from plant chamber experiments was suitable for model parameterization. [...]
536 _ _ |0 G:(DE-HGF)POF3-255
|a 255 - Terrestrial Systems: From Observation to Prediction (POF3-255)
|c POF3-255
|f POF III
|x 0
650 _ 7 |x Diss.
856 4 _ |u https://juser.fz-juelich.de/record/202655/files/Energie_Umwelt_266.pdf
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|y OpenAccess
909 C O |o oai:juser.fz-juelich.de:202655
|p openaire
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|p VDB:Earth_Environment
|p VDB
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910 1 _ |0 I:(DE-588b)5008462-8
|6 P:(DE-Juel1)144570
|a Forschungszentrum Jülich GmbH
|b 0
|k FZJ
913 1 _ |0 G:(DE-HGF)POF3-255
|1 G:(DE-HGF)POF3-250
|2 G:(DE-HGF)POF3-200
|a DE-HGF
|l Terrestrische Umwelt
|v Terrestrial Systems: From Observation to Prediction
|x 0
|4 G:(DE-HGF)POF
|3 G:(DE-HGF)POF3
|b Erde und Umwelt
914 1 _ |y 2015
915 _ _ |0 StatID:(DE-HGF)0510
|2 StatID
|a OpenAccess
920 _ _ |l yes
920 1 _ |0 I:(DE-Juel1)IBG-3-20101118
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980 _ _ |a book
980 _ _ |a I:(DE-Juel1)IBG-3-20101118
980 1 _ |a FullTexts


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