scholarly journals Stable Isotopes of Water Vapor in the Vadose Zone: A Review of Measurement and Modeling Techniques

2013 ◽  
Vol 12 (1) ◽  
pp. vzj2011.0165er
Author(s):  
Keir Soderberg ◽  
Stephen P. Good ◽  
Lixin Wang ◽  
Kelly Caylor
Keyword(s):  
Stable Isotopes ◽  
Water Vapor ◽  
Vadose Zone ◽  
Modeling Techniques ◽  
Stable Isotopes Of Water

scholarly journals Stable Isotopes of Water Vapor in the Vadose Zone: A Review of Measurement and Modeling Techniques

2012 ◽  
Vol 11 (3) ◽  
pp. vzj2011.0165 ◽  
Author(s):  
Keir Soderberg ◽  
Stephen P. Good ◽  
Lixin Wang ◽  
Kelly Caylor
Keyword(s):  
Stable Isotopes ◽  
Water Vapor ◽  
Vadose Zone ◽  
Modeling Techniques ◽  
Stable Isotopes Of Water

scholarly journals Continuous observation of Stable Isotopes of Water Vapor in Atmosphere Using High-Resolution FTIR

2018 ◽  
Author(s):  
Chang-Gong Shan ◽  
Wei Wang ◽  
Cheng Liu ◽  
You-Wen Sun ◽  
Yuan Tian ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Water Vapor ◽  
High Resolution ◽  
Water Cycle ◽  
Back Trajectories ◽  
Mixing Ratios ◽  
Keeling Plot ◽  
Stable Isotopes Of Water ◽  
Observation Period ◽  
Good Agreement

Abstract. Observations of stable isotopes of water vapor provide important information for water cycle. The volume mixing ratios (VMR) of H2O (XH2O) and HDO (XHDO) have been retrieved based on a high-resolution ground-based Fourier transform infrared spectroscopy (FTIR) at Hefei site, and the isotopic composition δD was calculated. Time series of XH2O were compared with the Greenhouse gases Observing Satellite (GOSAT) data, showing a good agreement. The daily averaged δD ranges from −17.02 ‰ to −282.3 ‰ between September 2015 and September 2016. Also, the relationships of meteorological parameters with stable isotopologue were analyzed. δD values showed an obvious positive correlation with temperature and ln(XH2O) and a weak correlation with relative humidity. Further, 51.35 % of airmass at Hefei site comes from the southeast of China, and the main potential sources of δD are in the east of China over the observation period based on the back trajectories model. Furthermore, the δD values of evapotranspiration were calculated based on Keeling plot. Observations of the stable isotopes of water vapor by high-resolution ground-based FTIR provide information on study of the variation of the atmospheric water vapor at Hefei site.

Interannual variation in stable isotopes in water vapor over the northern Tibetan Plateau linked to ENSO

2021 ◽  
Author(s):  
Zhaowei Jing ◽  
Wusheng Yu ◽  
Andreas Schneider ◽  
Tobias Borsdorff ◽  
Jochen Landgraf ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Water Vapor ◽  
Tibetan Plateau ◽  
Interannual Variation ◽  
Northern Tibetan Plateau

Characterization of hydraulic properties in the upper vadose zone for two aquifers in Slovenia

2021 ◽  
Author(s):  
Vesna Zupanc ◽  
Matjaž Glavan ◽  
Miha Curk ◽  
Urša Pečan ◽  
Michael Stockinger ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Soil Water ◽  
Water Flow ◽  
Vadose Zone ◽  
Hydraulic Properties ◽  
Isotope Composition ◽  
Transport Processes ◽  
Precipitation Event ◽  
Water Fluxes ◽  
Flow And Transport

<p>Environmental tracers, present in the environment and provided by nature, provide integrative information about both water flow and transport. For studying water flow and solute transport, the hydrogen and oxygen isotopes are of special interest, as their ratios provide a tracer signal with every precipitation event and are seasonally distributed. In order to follow the seasonal distribution of stable isotopes in the soil water and use this information for identifying hydrological processes and hydraulic properties, soil was sampled three times in three profiles, two on Krško polje aquifer in SE Slovenia and one on Ljubljansko polje in central Slovenia. Isotope composition of soil water was measured with the water-vapor-equilibration method. Based on the isotope composition of soil water integrative information about water flow and transport processes with time and depth below ground were assessed. Porewater isotopes were in similar range as precipitation for all three profiles.  Variable isotope ratios in the upper 60 cm for the different sampling times indicated dynamic water fluxes in this upper part of the vadose zone. Results also showed more evaporation at one sampling location, Brege. The information from stable isotopes will be of importance for further analyzing the water fluxes in the vadose zone of the study sties. <br>This research was financed by the ARRS BIAT 20-21-32 and IAEA CRP 1.50.18 Multiple isotope fingerprints to identify sources and transport of agro-contaminants.  </p>

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