Preprints
https://doi.org/10.5194/egusphere-2025-2101
https://doi.org/10.5194/egusphere-2025-2101
25 Sep 2025
 | 25 Sep 2025
Status: this preprint is open for discussion and under review for Atmospheric Measurement Techniques (AMT).

Improved method for temporally interpolating radiosonde profiles

Linus von Klitzing, David D. Turner, Diego Lange, and Volker Wulfmeyer

Abstract. A significantly improved technique for temporally interpolating radiosonde profiles of potential temperature and water vapor mixing ratio (WVMR) during daytime is introduced. The key innovation of this technique is its operation on a height grid normalized with the planetary boundary layer height (PBLH). This study utilized a three-month dataset of three-hourly soundings from the Atmospheric Radiation Measurement Program's (ARM) Southern Great Plains (SGP) site. The technique was evaluated for convective boundary layer (CBL) cases, with the necessary PBLH data obtained from a ground-based infrared spectrometer. A total of 79 comparisons were conducted between reference soundings and interpolated profiles that did and did not employ height normalization (HN). The results demonstrated a substantial improvement in the representation of interpolated profiles using the new technique, characterized by enhanced correlation, improved amplitude representation, and reduced bias for potential temperature, as well as improved correlation and reduced bias for WVMR.

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Linus von Klitzing, David D. Turner, Diego Lange, and Volker Wulfmeyer

Status: open (until 30 Oct 2025)

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Linus von Klitzing, David D. Turner, Diego Lange, and Volker Wulfmeyer
Linus von Klitzing, David D. Turner, Diego Lange, and Volker Wulfmeyer

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Short summary
Many atmospheric science endeavors require temporally resolved profiles of temperature, humidity, and winds. Radiosondes are considered the gold standard for measuring these profiles, but the temporal resolution is frequently too coarse for many applications within the atmospheric boundary layer. This study proposes a new method using a normalized height grid in the temporal interpolation process that yields more accurate profiles in the convective boundary layer.
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