Diurnal and semi-diurnal low-level wind cycles over a tropical island

Aspliden, C. I.; Lynn, Andrew Paul; Souza, Rafael Lisboa de; Rudder, G.

doi:10.1007/bf00121972

Cited by 7 publications

(10 citation statements)

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“…The semidiurnal phenomenon refers to the wind vector variations exhibited a 12 h cycle. Garstang et al and Aspliden and Lynn conducted studies in the coastal zone of a tropical island, using rawin and sounding balloons to measure the relevant characteristics with respect to various altitudes. Their results revealed notable diurnal and semidiurnal phenomena at high altitudes.…”

Section: Introductionmentioning

confidence: 99%

“…Their results revealed notable diurnal and semidiurnal phenomena at high altitudes. Aspliden and Lynn stated that periodic winds are closely related to atmospheric tides, as proposed by Chapman and LindZen . Chen et al analyzed the long‐term data obtained by the wind profiler of the National Central University (NCU) and identified strong semidiurnal oscillations in the high‐altitude layer over Taiwan, particularly in the layer with an altitude between 2000 and 6000 m. In the surface layer over tropical oceans, surface wind fields exhibit semidiurnal variation.…”

Section: Introductionmentioning

confidence: 99%

“…A rotary spectrum analysis revealed that the major axis of the wind ellipse that represented land‐sea breeze was frequently perpendicular to the coastline orientation. Aspliden and Lynn, and Rolando and Simon discussed the horizontal and vertical structures of land‐sea breezes. Aspliden and Lynn determined that the periodicity of wind speed oscillations changed from semidiurnal to diurnal from coastal regions to inland regions.…”

Section: Introductionmentioning

confidence: 99%

“…Aspliden and Lynn, and Rolando and Simon discussed the horizontal and vertical structures of land‐sea breezes. Aspliden and Lynn determined that the periodicity of wind speed oscillations changed from semidiurnal to diurnal from coastal regions to inland regions. Rolando and Simon used boundary‐layer wind‐profiling radar to observe wind field variations at 150 to 700 m above ground, along the southwestern coast of the UK.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the amplitude of variations in wind speed is greater in the upper atmosphere than at the surface level. Substantial semidiurnal phenomena are present at the surface or in lower tropospheric winds over tropical islands and open oceans .…”

Section: Introductionmentioning

confidence: 99%

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Diurnal and semidiurnal variability of coastal wind over Taiwanese waters

et al. 2014

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The Taiwan Strait is rich in offshore wind energy. Developing offshore wind farms is vital for renewable energy development. Rapid variations in the speed of offshore wind affect the capacity and operations of wind farms. On the basis of the demand for developing offshore wind farms in Taiwanese waters, this study examined in situ coastal wind data and documented the characteristics of the diurnal and semidiurnal oscillations in surface wind as well as the seasonal and spatial characteristics of these oscillations. Wavelet‐based rotary spectral analysis and significance level theory were adopted to quantify the occurrence probability and intensity of diurnal and semidiurnal wind fields. The occurrence probability of semidiurnal variations was approximately 50% greater than that of diurnal variations across Taiwan, with persistent occurrence of such variations near the southwest coast. The intensity of the diurnal phenomena was twice that of the semidiurnal phenomena, reaching an average of 27% of the wind energy variation at the potential sites located in Western Taiwan. Diurnal wind velocity oscillations were most intense during the fall but declined as the latitude moved from north to south. The instantaneous rotary spectrum was used to estimate the ellipticity of the wind vector. The analysis indicated that diurnal wind was dominated by land‐sea breezes. Moreover, the semidiurnal wind was less influenced by surface thermal effects than by diurnal phenomena. The effects of these phenomena on offshore wind energy conversion are considerable and should not be ignored. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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