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Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques
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Note: A balloon-borne accelerometer technique for measuring atmospheric turbulence.

Graeme J Marlton1, R Giles Harrison1, Keri A Nicoll1

  • 1Department of Meteorology, University of Reading, Earley Gate, Reading RG6 6BB, United Kingdom.

The Review of Scientific Instruments
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Summary
This summary is machine-generated.

Weather balloons equipped with accelerometers can measure atmospheric turbulence by tracking pendulum-like swings. This novel method provides in situ turbulence data, crucial for understanding atmospheric dynamics.

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Area of Science:

  • Atmospheric Science
  • Geophysics
  • Fluid Dynamics

Background:

  • Atmospheric turbulence detection is vital for aviation safety and weather forecasting.
  • Traditional methods for measuring turbulence can be complex and costly.
  • Understanding turbulence dynamics aids in atmospheric modeling and climate research.

Purpose of the Study:

  • To investigate the use of a weather balloon's pendulum dynamics for detecting atmospheric turbulence.
  • To develop a novel, in situ method for quantifying turbulence intensity.
  • To calibrate measurements against established atmospheric sensing technologies.

Main Methods:

  • A weather balloon with a suspended instrument package, including an accelerometer, was utilized.
  • The system's pendulum-like motion induced by atmospheric turbulence was analyzed.
  • Accelerometer data was calibrated using a vertically oriented lidar for validation.

Main Results:

  • Strong turbulence events induced accelerations exceeding 5g (where g = 9.81 m s(-2)).
  • Eddy dissipation rates between 10(-3) and 10(-2) m(2) s(-3) were successfully derived from accelerometer data.
  • The method demonstrated feasibility for in situ turbulence measurement.

Conclusions:

  • A weather balloon system offers a novel approach for standardized in situ atmospheric turbulence measurements.
  • The adapted instrument package effectively quantifies turbulence-induced accelerations.
  • This technique provides a cost-effective and accessible tool for atmospheric research.