Use of Doppler Sodar in atmospheric measurements

Authors

  • Edmilson Dias de Freitas Department of Atmospheric Sciences, University of São Paulo - USP, São Paulo, SP.
  • Maria Assunção Faus da Silva Dias Department of Atmospheric Sciences, University of São Paulo - USP, São Paulo, SP.
  • K. Narayanan Nair Department of Atmospheric Sciences, University of São Paulo - USP, São Paulo, SP.
  • Pedro Leite da Silva Dias Department of Atmospheric Sciences, University of São Paulo - USP, São Paulo, SP.

DOI:

https://doi.org/10.5902/2179460X36911

Abstract

O uso do Sodar Doppler tem trazido avanços significativos ao entendimento dos processos de camada limite atmosférica. Estes instrumentos têm demonstrado suas habilidades em um grande número de estudos, tais como circulações de brisa marítima/terrestre, escoamento em terrenos complexos, ondas de gravidade, jatos de baixos níveis e sistemas frontais, além de possibilitar estimativas quantitativas de parâmetros de turbulência tais como fluxo de calor sensível, balanço de energia cinética turbulenta, função estrutura de temperatura e a determinação da altura da camada de mistura.

Neste trabalho, o princípio de funcionamento de diferentes tipos de Sodar, suas habilidades e limitações na instalação desses instrumentos são apresentados. No final, alguns fenômenos detectados por um Sodar Doppler do tipo “phased-array”, recentemente adquirido pelo IAG-USP, são apresentados.

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References

DT 94/003: Remtech Doppler Sodar Operating Manual. PA1, PA2, PA3 DELL PC compatible based systems.

Kalogiros, J. A., C. G. Helmis, D. N. Asimakopoulos and P. G. Papageorgas, 1999: Estimation fo ABL Parameters Using the Vertical Velocity Measurements of an Acoustic Sounder. Bound.-Layer Meteor. 91, 413-449.

Little, C. G., 1969: Acoustic methods for the remote probing of the lower atmosphere. Proc. IEEE, 57, 571-578.

Nair, K. N., P. K. Kunrikrishnan, K. S. Gupta and R. Ramachadran, 1989: Sudy of vertical wind and temperature turbulence in a convective boudary layer from Sodar observation at Thumba. Indian Journal of Radio & Space Physics, 18, 157-159.

_____, 1999: On Low Level Jet at Coastal Station Thumba. Indian Journal of Radio & Space Physics, 28, 55-59.

Patra, A. K., U. K De and D. Lohar, 1998: Existence of low level jet during premonsoon period over eastern india and its role in the initiation of nocturnal thunderstorms. Atmósfera. 12, 15-26.

Ralph, F. M., C. Mazaudier, M. Crochet and S. V. Venkateswaran, 1993: Doppler Sodar and Radar Wind-Profiler Observations of Gravity-Wave Activity Associated with a Gravity Current. Mon. Wea. Rev. 121, 444-463.

Singal, S. P., B. S. Gera, and S. K. Aggarwal, 1982: Determination of structure parameters using sodar. Bound.-Layer Meteor. 23, 105-114.

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Published

2000-01-14

How to Cite

Freitas, E. D. de, Dias, M. A. F. da S., Nair, K. N., & Dias, P. L. da S. (2000). Use of Doppler Sodar in atmospheric measurements. Ciência E Natura, 153–165. https://doi.org/10.5902/2179460X36911

Issue

CIÊNCIA E NATURA, SPECIAL VOLUME, 2000: WORKSHOP ON PHYSICS OF THE PLANETARY BOUNDARY LAYER AND DISPERSION PROCESS MODELING

Section

Articles

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