| Observations of Dynamic Turbulence in the Lower Stratosphere over Inner Mongolia Using a High-resolution Balloon Sensor Constant Temperature Anemometer |
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| 作者姓名： | Xiaoyu REN Yi LIU Zhaonan CAI Yuli ZHANG |
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| 作者单位： | Carbon Neutrality Research Center;University of Chinese Academy of Sciences |
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| 基金项目： | supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDA17010102)。 |
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| 摘 要： | We present characterizations of the dynamic turbulence in the lower stratosphere measured by a new balloon-based system designed for detecting finer scale dynamic turbulence. The balloon-based system included a constant temperature anemometer(CTA) operating at a sampling rate of 2 k Hz at an ascent speed of 5 m s-1(corresponding to a vertical resolution of 2.5 mm), an industrial personal computer, batteries, sensors for ambient temperature and humidity, an A/D converter, and others. The system was successfully launched to 24 km altitude over Bayannur City, Inner Mongolia Province. Results show the spatial intermittence of the turbulence layers, with clear boundaries between turbulent and nonturbulent regions. This is the first time that the dynamic turbulence spectrum down to the viscous sub-range has been obtained throughout the lower stratosphere over China. With that, the energy dissipation rates of dynamic turbulence could be calculated with high precision. The profile of the dissipation rates varied from 7.37 × 10-7 to 4.23 W kg-1 and increased with altitude in the stratosphere.
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| 关 键 词： | dynamic turbulence STRATOSPHERE balloon payload high spatial resolution dissipation rates Inner Mongolia |
Observations of Dynamic Turbulence in the Lower Stratosphere over Inner Mongolia Using a High-resolution Balloon Sensor Constant Temperature Anemometer |
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| Xiaoyu REN,Yi LIU,Zhaonan CAI,Yuli ZHANG.Observations of Dynamic Turbulence in the Lower Stratosphere over Inner Mongolia Using a High-resolution Balloon Sensor Constant Temperature Anemometer[J].Advances in Atmospheric Sciences,2022,39(3):519-528. |
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| Authors: | Xiaoyu REN Yi LIU Zhaonan CAI Yuli ZHANG |
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| Abstract: | We present characterizations of the dynamic turbulence in the lower stratosphere measured by a new balloon-based system designed for detecting finer scale dynamic turbulence. The balloon-based system included a constant temperature anemometer (CTA) operating at a sampling rate of 2 kHz at an ascent speed of 5 m s?1 (corresponding to a vertical resolution of 2.5 mm), an industrial personal computer, batteries, sensors for ambient temperature and humidity, an A/D converter, and others. The system was successfully launched to 24 km altitude over Bayannur City, Inner Mongolia Province. Results show the spatial intermittence of the turbulence layers, with clear boundaries between turbulent and non-turbulent regions. This is the first time that the dynamic turbulence spectrum down to the viscous sub-range has been obtained throughout the lower stratosphere over China. With that, the energy dissipation rates of dynamic turbulence could be calculated with high precision. The profile of the dissipation rates varied from 7.37 × 10?7 to 4.23 W kg?1 and increased with altitude in the stratosphere. |
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| Keywords: | dynamic turbulence stratosphere balloon payload high spatial resolution dissipation rates Inner Mongolia |
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