• Alexander, P. 2003. A numerical study of open atmospheric balloon dynamics. Phys. Fluids 15:30653078.

  • Alexander, P., and A. de la Torre. 1999. The interpretation of saturated spectra as obtained from atmospheric balloon measurements. J. Appl. Meteor. 38:334342.

    • Search Google Scholar
    • Export Citation
  • Alexander, P., and A. de la Torre. 2003. A program for the simulation and analysis of open atmospheric balloon soundings. Comput. Phys. Commun. 151:96120.

    • Search Google Scholar
    • Export Citation
  • Alexander, A., , J. Cornejo, , and A. de la Torre. 1996. The response of an open stratospheric balloon in the presence of inertio-gravity waves. J. Appl. Meteor. 35:6068.

    • Search Google Scholar
    • Export Citation
  • de la Torre, A., and P. Alexander. 1995. The interpretation of wavelengths and periods as measured from atmospheric balloons. J. Appl. Meteor. 34:27472754.

    • Search Google Scholar
    • Export Citation
  • de la Torre, A., , H. Teitelbaum, , and F. Vial. 1996. Stratospheric and tropospheric gravity wave measurements near the Andes Mountains. J. Atmos. Terr. Phys. 58:521530.

    • Search Google Scholar
    • Export Citation
  • de la Torre, A., , P. Alexander, , and J. Cornejo. 2003. A relationship between skin thermal conductivity and gas polytropic index in an open atmospheric balloon. J. Appl. Meteor. 42:325330.

    • Search Google Scholar
    • Export Citation
  • Gardner, C. S., and N. F. Gardner. 1993. Measurement distortion in aircraft, space shuttle, and balloon observations of atmospheric density and temperature perturbation spectra. J. Geophys. Res. 98:10231033.

    • Search Google Scholar
    • Export Citation
  • Hines, C. O. 1960. Internal atmospheric gravity waves at ionospheric heights. Can. J. Phys. 38:14411481.

  • Kitchen, M., and G. J. Shutts. 1990. Radiosonde observations of large-amplitude gravity waves in the lower and middle stratosphere. J. Geophys. Res. 95:2045120455.

    • Search Google Scholar
    • Export Citation
  • Morris, A. L. 1975. Scientific ballooning handbook NCAR Tech. Note TN-99+IA, 478 pp.

  • Tatom, F. B., and R. L. King. 1976. Determination of constant-volume balloon capabilities for aeronautical research NASA Contractor Rep. CR-2805, 169 pp.

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 6 6 0
PDF Downloads 1 1 0

A Numerical Study on the Interpretation of Data from Open Atmospheric Balloon Soundings

View More View Less
  • 1 Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
© Get Permissions
Restricted access

Abstract

Wrong information may be extracted from balloon soundings if neither appropriate interpretation and processing nor evaluations of certain inevitable distortions or artifacts on atmospheric measurements are performed. A numerical code that finds solutions to the dynamical and thermal equations describing an open balloon in the atmosphere is used to develop flight simulations under diverse conditions. The results are then employed to point out that a valid determination of values for diverse variables is intrinsically difficult. It is shown that the distance between the balloon and gondola may be chosen to optimize the information to be obtained from observations obtained during ascent and descent, so that even without an accurate balloon-tracking system, it may be possible to reconstruct horizontal wind fluctuations from the measurements. Vertical air oscillations may be only grossly inferred in some cases. The propagation direction of gravity waves detected during a sounding may be inferred and vertical wavelengths may typically be determined with a 10% accuracy. Air velocity measurements performed during flotation may be used to find shears.

Corresponding author address: Dr. P. Alexander, Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires 1428, Argentina. peter@df.uba.ar

Abstract

Wrong information may be extracted from balloon soundings if neither appropriate interpretation and processing nor evaluations of certain inevitable distortions or artifacts on atmospheric measurements are performed. A numerical code that finds solutions to the dynamical and thermal equations describing an open balloon in the atmosphere is used to develop flight simulations under diverse conditions. The results are then employed to point out that a valid determination of values for diverse variables is intrinsically difficult. It is shown that the distance between the balloon and gondola may be chosen to optimize the information to be obtained from observations obtained during ascent and descent, so that even without an accurate balloon-tracking system, it may be possible to reconstruct horizontal wind fluctuations from the measurements. Vertical air oscillations may be only grossly inferred in some cases. The propagation direction of gravity waves detected during a sounding may be inferred and vertical wavelengths may typically be determined with a 10% accuracy. Air velocity measurements performed during flotation may be used to find shears.

Corresponding author address: Dr. P. Alexander, Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires 1428, Argentina. peter@df.uba.ar

Save