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Atmospheric water balance in the Amazon basin: An isotopic evapotranspiration model
Abstract
An increase of 3‰ in the “d” value of the isotopic composition of precipitation over the Amazon Basin suggests that an isotopically fractionated evapotranspiration flux contributes to the atmospheric water balance over the region. A steady state evapotranspiration model for the Amazon Basin was developed, and it is shown that the observed increase in the “d” value corresponds to a situation where 20–40% of the total evapotranspiration flux is accompanied by an isotopic fractionation, such as by evaporation from an open water surface. The site of this fractionation, whether by evaporation from the flood plains, canopy interception or lakes, cannot be resolved with the presently available data set.
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Citations
Cited by
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Global Isotope Hydrogeology―Review
Jasechko, S. (2019) · Reviews of Geophysics · doi:10.1029/2018rg000627 · Cited by 384
Fossil dripwater in stalagmites reveals Holocene temperature and rainfall variation in Amazonia
van Breukelen, M. R., Vonhof, H. B., Hellstrom, J. C., Wester, W. C. G., & Kroon, D. (2008) · Earth and Planetary Science Letters · doi:10.1016/j.epsl.2008.07.060 · Cited by 236
Metadata
- Authors
- Gat, J. R., & Matsui, E.
- Venue
- Journal of Geophysical Research: Atmospheres
- Publisher
- American Geophysical Union (AGU)
- Published
- 1991-07-20
- Volume
- 96
- Issue
- D7
- Pages
- 13179-13188
- ISSN
- 0148-0227 (ISSN-L)
- OpenAlex
- W2059872752
- Cited by
- 405
- References
- 0
- FWCI
- 1.23
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Atmospheric water balance in the Amazon basin: An isotopic evapotranspiration model. https://app.cochat.ai/papers/10.1029/91jd00054
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- Gat, J. R., & Matsui, E. (1991). Atmospheric water balance in the Amazon basin: An isotopic evapotranspiration model. Journal of Geophysical Research: Atmospheres. https://doi.org/10.1029/91jd00054
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