In:
Journal of Atmospheric and Oceanic Technology, American Meteorological Society, Vol. 31, No. 1 ( 2014-01-01), p. 62-78
Abstract:
In this study the crosswind (U⊥) is determined from the time-lag correlation function [r12(τ)] measured by a dual large-aperture scintillometer; U⊥ is defined as the wind component perpendicular to a path—in this case, the scintillometer path. A scintillometer obtains a path-averaged U⊥, which for some applications is an advantage compared to other wind measurement devices. Four methods were used to obtain U⊥: the peak method, the Briggs method, the zero-slope method, and the lookup table method. This last method is a new method introduced in this paper, which obtains U⊥ by comparing r12(τ) of a measurement to r12(τ) of a theoretical model. The U⊥ values obtained from the scintillometer were validated with sonic anemometer measurements. The best results were obtained by the zero-slope method for U⊥ & lt; 2 m s−1 and by the lookup table method for U⊥ & gt; 2 m s−1. The Briggs method also showed promising results, but it is not always able to obtain U⊥. The results showed that a high parallel wind component ( & gt;2.5 m s−1) on the scintillometer path can cause an overestimation of U⊥ mainly for low U⊥ values ( & lt;2 m s−1).
Type of Medium:
Online Resource
ISSN:
0739-0572
,
1520-0426
DOI:
10.1175/JTECH-D-13-00118.1
Language:
English
Publisher:
American Meteorological Society
Publication Date:
2014
detail.hit.zdb_id:
2021720-1
detail.hit.zdb_id:
48441-6
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