The Use of Water Vapor Isotopes to Determine Evapotranspiration Source Contributions in the Natural Environment
Water balance measurements are the simplest and most direct means of estimating evapotranspiration (ET). However, numerous factors relating to climate and terrain characteristics contribute to the variability that makes the assessment of evapotranspiration challenging at the ecosystem or even the pl...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-11-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/12/11/3203 |
| _version_ | 1797547767142285312 |
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| author | Troy P. Bernier |
| author_facet | Troy P. Bernier |
| author_sort | Troy P. Bernier |
| collection | DOAJ |
| description | Water balance measurements are the simplest and most direct means of estimating evapotranspiration (ET). However, numerous factors relating to climate and terrain characteristics contribute to the variability that makes the assessment of evapotranspiration challenging at the ecosystem or even the plot scale. Alternative methods, such as an isotope mass balance (IMB), can provide evapotranspiration estimates. This paper illustrates two IMB examples of partitioning evaporation and transpiration. The first example demonstrates at the laboratory scale how accurate mass-balance measurements provide a complete validation and refinement of the isotope mass balance methods. The second IMB case uses similar data processing methods for an experimental field design. These methods are further validated by comparison with previous laboratory and field studies. Finally, this paper presents a comparison between partitioned ET ratios from a nearby U.S. Geological Survey (USGS) microclimate site produced using the Flux Variance Similarity (FVS) method. The results suggest the potential of employing these methods to estimate evaporation and transpiration source contributions at various scales. This technique and its further development show IMB methods are an appropriate tool for partitioning evapotranspiration. |
| first_indexed | 2024-03-10T14:48:49Z |
| format | Article |
| id | doaj.art-69e534c34d524dc0b0698a3fd3fa11cb |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T14:48:49Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-69e534c34d524dc0b0698a3fd3fa11cb2023-11-20T21:08:10ZengMDPI AGWater2073-44412020-11-011211320310.3390/w12113203The Use of Water Vapor Isotopes to Determine Evapotranspiration Source Contributions in the Natural EnvironmentTroy P. Bernier0H2O Resource, Inc., 2421 NW 98th Lane, Sunrise, FL 33322, USAWater balance measurements are the simplest and most direct means of estimating evapotranspiration (ET). However, numerous factors relating to climate and terrain characteristics contribute to the variability that makes the assessment of evapotranspiration challenging at the ecosystem or even the plot scale. Alternative methods, such as an isotope mass balance (IMB), can provide evapotranspiration estimates. This paper illustrates two IMB examples of partitioning evaporation and transpiration. The first example demonstrates at the laboratory scale how accurate mass-balance measurements provide a complete validation and refinement of the isotope mass balance methods. The second IMB case uses similar data processing methods for an experimental field design. These methods are further validated by comparison with previous laboratory and field studies. Finally, this paper presents a comparison between partitioned ET ratios from a nearby U.S. Geological Survey (USGS) microclimate site produced using the Flux Variance Similarity (FVS) method. The results suggest the potential of employing these methods to estimate evaporation and transpiration source contributions at various scales. This technique and its further development show IMB methods are an appropriate tool for partitioning evapotranspiration.https://www.mdpi.com/2073-4441/12/11/3203water-vapor isotopesevapotranspirationwater budgetwater mass balancefractionationisotope mass balance |
| spellingShingle | Troy P. Bernier The Use of Water Vapor Isotopes to Determine Evapotranspiration Source Contributions in the Natural Environment Water water-vapor isotopes evapotranspiration water budget water mass balance fractionation isotope mass balance |
| title | The Use of Water Vapor Isotopes to Determine Evapotranspiration Source Contributions in the Natural Environment |
| title_full | The Use of Water Vapor Isotopes to Determine Evapotranspiration Source Contributions in the Natural Environment |
| title_fullStr | The Use of Water Vapor Isotopes to Determine Evapotranspiration Source Contributions in the Natural Environment |
| title_full_unstemmed | The Use of Water Vapor Isotopes to Determine Evapotranspiration Source Contributions in the Natural Environment |
| title_short | The Use of Water Vapor Isotopes to Determine Evapotranspiration Source Contributions in the Natural Environment |
| title_sort | use of water vapor isotopes to determine evapotranspiration source contributions in the natural environment |
| topic | water-vapor isotopes evapotranspiration water budget water mass balance fractionation isotope mass balance |
| url | https://www.mdpi.com/2073-4441/12/11/3203 |
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