Observation and Simulation of Wind Speed and Wind Power Density over Bac Lieu Region

Advances in Meteorology - Tập 2021 - Trang 1-17 - 2021
Hiep Van Nguyen1, Phạm Xuân Thành1, Nguyen Duc Nam1, Nguyen Xuan Anh1, Pham Le Khuong2,1, Hoàng Hải Sơn2,1, Nguyên Tiên Mạnh1, Pham Chi Cong3
1Institute of Geophysics (IGP), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
2Graduate University of Sciences and Technology (GUST), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
3Vietnam Research Institute of Electronics, Informatics and Automation (VIELINA), Hanoi, Vietnam

Tóm tắt

In this study, the WRF (Weather Research and Forecasting) model was used to simulate and investigate diurnal and annual variations of wind speed and wind power density over Southern Vietnam at 2‐km horizontal resolution for two years (2016 and 2017). The model initial and boundary conditions are from the National Centers for Environmental Prediction (NCEP) Final Analyses (FNL). Observation data for two years at 20 m height at Bac Lieu station were used for model bias correction and investigating diurnal and annual variation of wind speeds. The results show that the WRF model overestimates wind speeds. After bias correction, the model reasonably well simulates wind speeds over the research area. Wind speed and wind power density show much higher values at levels of 50–200 m above ground levels than near ground (20 m) level and significantly higher near the coastal regions than inland. Wind speed has significant annual and diurnal cycles. Both annual and diurnal cycles of wind speeds were well simulated by the model. Wind speed is much stronger during daytime than at nighttime. Low-level wind speed reaches the maximum at about 14 LT to 15 LT when the vertical momentum mixing is highly active. Wind speeds over the eastern coastal region of Southern Vietnam are much stronger in winter than in summer due to two main reasons, including (1) stronger large-scale wind speed in winter than in summer and (2) funnel effect creating a local maximum wind speed over the nearshore ocean which then transports high-momentum air inland in winter.

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Advances in Meteorology

Tập 2021

1-17

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