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| Titel |
A comparative analysis of two wind velocity retrieval techniques by using a single Doppler radar |
| VerfasserIn |
H.-C. Lim, D.-I. Lee |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 13, no. 5 ; Nr. 13, no. 5 (2009-05-26), S.651-661 |
| Datensatznummer |
250011864
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| Publikation (Nr.) |
 copernicus.org/hess-13-651-2009.pdf |
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| Zusammenfassung |
| This study compares the theoretical basis of the two wind velocity retrieval methods,
Velocity Azimuth Display (VAD) and Velocity Area Display (VARD) by using data obtained by a single Doppler
radar. Two pre-assumed shapes of the wind velocity distribution with altitude are considered, uniform and
parabolic. The former presents an approximation of the non-sheared or low-sheared wind flow in the upper
troposphere, while the latter is a simplified representation of the Atmospheric Boundary Layer (ABL) in lower
troposphere or high-sheared wind flow at the edges of the tropospheric jet streams. Both techniques for the
wind velocity retrieval considered in this study are reformulated in order to get more precise information on
the wind velocity components. An algorithm is proposed to decrease the uncertainty in retrieving by
evaluating the coefficients of the polynomial equation and applying a transfer function with respect to the
angle formed between the wind flow direction and direction of radar beam. It is concluded that, provided the
formulated transformation functions are used, the application of the VAD and VARD techniques to the
single-Doppler data may be an invaluable tool for solving various climate and wind engineering problems. |
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