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February 2, 2026Atmospheric chemistry and physicsOpen Access

Kinetic fractionation of noble gases in the stratosphere over Japan

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Authors

SSSatoshi SugawaraIOIkumi OyabuKKKenji Kawamura

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Overview

High-precision analysis reveals vertical distributions of noble gases in the stratosphere, implying transport mechanisms.

Key Points

  • This study aims to reveal the vertical distributions of noble gases and clarify the processes behind their separations in the stratosphere.
  • Utilized high-precision analyses of noble gases from stratospheric air samples
  • Collected air samples using balloon-borne cryogenic samplers over Japan
  • Performed model simulations to reproduce kinetic fractionations for noble gases
  • Isotopic and elemental ratios of noble gases showed a decrease with altitude for heavy gases and an increase for light gases
  • Vertical distributions were normalized to show that larger mass numbers experienced smaller separation in ratios
  • Model simulations confirmed that the kinetic fractionation could serve as a diagnostic tool for stratospheric transport processes

Cite This Study

Sugawara et al. (2026) studied this question.

synapsesocial.com/papers/6980fc91c1c9540dea80e686https://doi.org/10.5194/acp-26-1537-2026
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