Articles | Volume 14, issue 6
Atmos. Meas. Tech., 14, 4657–4667, 2021
https://doi.org/10.5194/amt-14-4657-2021
Atmos. Meas. Tech., 14, 4657–4667, 2021
https://doi.org/10.5194/amt-14-4657-2021

Research article 23 Jun 2021

Research article | 23 Jun 2021

Modeling the dynamic behavior of a droplet evaporation device for the delivery of isotopically calibrated low-humidity water vapor

Erik Kerstel

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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Erik Kerstel on behalf of the Authors (06 Apr 2021)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (12 Apr 2021) by Marc von Hobe
RR by Anonymous Referee #2 (10 May 2021)
ED: Publish subject to technical corrections (11 May 2021) by Marc von Hobe
AR by Erik Kerstel on behalf of the Authors (18 May 2021)  Author's response    Manuscript
Short summary
A model was developed to quantitatively describe the dynamics, in terms of vapor-phase water concentration and isotope ratios, of nanoliter-droplet evaporation at the end of a syringe needle. Such a low humidity generator can be used to calibrate laser-based water isotope analyzers, e.g., in Antarctica. We show that modeling of experimental data constrains isotope fractionation factors and the evaporation rate to physically realistic values in good agreement with available literature values.