the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Variation of deuterium excess in surface waters across a 5000-m elevation gradient in the east-central Himalaya
Abstract. The strong elevation gradient of the Himalaya allows investigation of altitude and orographic impacts on precipitation isotope values as captured in river samples. This study provides new high-elevation data along a 5000 m gradient collected from rain, snow, and glacial-sourced surface waters and time-series data from April to October 2016 to differentiate the time-variable contributions of source waters to the Arun River. We find nonlinear trends in δ18O and δD lapse rates driven by samples collected at high elevations and a distinct seasonal signal indicative of moisture source influences the surface-water isotope values. Deuterium excess is correlated to snowpack and used to track melt events during the monsoon. Our analysis identifies contributions from snowpack to river discharge before the monsoon onset followed by a 5-week transition to Indian Summer Monsoon-sourced rainfall around mid-June 2016.
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Interactive discussion
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RC1: 'Review of Voss et al., HESS 2018', Anonymous Referee #1, 02 Jan 2019
- AC1: 'Response to Anonymous Reviewer #1', Katalyn Voss, 15 Feb 2019
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RC2: 'Review of Voss et al. 2018', Anonymous Referee #2, 19 Jan 2019
- AC2: 'Response to Anonymous Reviewer #2', Katalyn Voss, 15 Feb 2019
Interactive discussion
-
RC1: 'Review of Voss et al., HESS 2018', Anonymous Referee #1, 02 Jan 2019
- AC1: 'Response to Anonymous Reviewer #1', Katalyn Voss, 15 Feb 2019
-
RC2: 'Review of Voss et al. 2018', Anonymous Referee #2, 19 Jan 2019
- AC2: 'Response to Anonymous Reviewer #2', Katalyn Voss, 15 Feb 2019
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Cited
2 citations as recorded by crossref.
- Isotopic analysis to quantify the role of the Indian monsoon on water resources of selected river basins in the Himalayas G. Jeelani et al. 10.1002/hyp.14406
- Stable isotope evidence on mechanisms and sources of groundwater recharge in quaternary aquifers of Kelantan, Malaysia M. Khan et al. 10.1007/s12517-021-07646-7