Simultaneous wind measurements over two sites using Doppler sodars

Comparative Study of the Near-Surface Typhoon Wind Profile Fitting between Offshore and Onshore Areas

“…e residual variances were just 3.5952e − 6 and 2.5237e − 4, respectively. For the model proposed by [20], the least square method is used to fit the power exponent and roughness length in this study by using equation (10), the F test values of typhoons in offshore and onshore areas were 9223 and 4645, respectively, which were larger than the values of F (6.724 and 6.7882, respectively) at the 0.01 level of significance.…”

“…By fitting multiple typhoon data, Song et al [20] suggested a � 0.11 and b � 0.2 under typhoon conditions, and a � 0.11 and b � 0.22 under nontyphoon conditions. He et al [23] used the Mangkhut data observed by the Shenzhen Meteorological Tower to fit z 0 and α using equation (10), and the fitting results were a � 0.11 and b � 0.18.…”

“…In offshore areas, Power et al [9] studied 331 strong wind profiles measured by GPS dropwindsonde near the eyewall of hurricanes in the Atlantic, and Eastern and Central Pacific basins from 1997 to 1999. e results showed that within the lower height of 200 m, the mean wind speed increases logarithmically with the height and reaches a maximum near the height of 500 m. is result is a good description of offshore wind profile characteristics during tropical cyclones. In the onshore area, Tamura et al [10] used two sets of Doppler sodars to observe the boundary layer wind in the seaside and inland areas, compared the characteristics of the mean wind profile of the same storm under different terrain roughness, and performed power-law and log-law model fitting of mean wind profiles. e results showed that the mean wind profile is different between suburbs and cities, the power-law model can describe the mean wind profile in suburbs well and is suitable for the mean wind profile over cities, and the log-law model is more suitable for both city and suburban areas in the height range of 100-150 m. Wang et al [11] used power-law, log-law and D-H models to fit the mean wind profile for wind speeds greater than 12 m s −1 at 10 m height based on data recorded from a wind observation tower in Pudong District (Shanghai) for Typhoon Meihua.…”

Analysis of height variations of sodar-derived wind speeds in Northern Spain

“…In this sense, meteorological masts are useful devices although they impose experimental restrictions. However, adequate vertical resolution is not usual, though this kind of study might provide extremely valuable information [3][4][5]. The main objective of this paper is to highlight the importance of detailed knowledge of the vertical structure of wind speed and its daily evolution and to highlight the risks of considering only wind speed values near the ground.…”