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臺灣能源期刊論文全文

臺灣能源期刊第10卷第2期內容

出刊日期:June, 2023

題目
利用中尺度大氣模擬探討臺灣東北季風時期 北部丘陵對西海岸風場之影響
Title
The Wind Field Study on the West Coast of Taiwan During the Northeast Monsoon Period Using Mesoscale Atmosphere Simulation
作者
陳盈如、李承祐、蔡原祥、苗君易
Authors
Yng-Ru Chen, Cheng-Yu Lee, Yuan-Shiang Tsai, Jiun-Jih Miau
摘要
臺灣冬季東北季風帶來相當豐沛之風力資源,然而穩定季風資源因臺灣複雜山脈地形而改變了 各地風場,當東北風觸碰臺灣陸地即受到臺灣北部丘陵以及高聳且南北走向的中央山脈阻擋,山脈 阻擋影響導致背風側臺灣西部風場的改變,本研究利用WRF中尺度數值預報模擬針對臺灣冬季東 北季風時期在西部海岸的風場變化進行模擬分析,經由模擬可發現在東北季風觸碰到臺灣北部丘陵 後,因地形阻擋而將氣流阻擋於北部及東北部山區,進而影響臺灣北部之局部氣壓,經模擬結果發 現臺灣北部海域在風向為正北風時,臺灣西部沿岸最大風速之區域約在苗栗外海;隨大陸性冷高壓 壟罩臺灣時,臺灣北部海域風向轉為東北風,而西部沿岸最大風速之區域移往臺中外海;大陸性冷 氣團漸離臺灣過後,臺灣東部以及北部海域風向轉為東風,而西部沿岸最大風速之區域由臺中再度 北移至西北沿岸,本研究經由局部氣壓場之差異發現造成臺灣西部海岸之風速差異的原因在於不同 風向以及臺灣地形之交互作用所致。
關鍵字
WRF數值預報模擬,東北季風,地形效應
Abatract
The northeast monsoon accompanies abundant wind resources in the winter of Taiwan. However, the wind field caused by the monsoon varies in different regions due to the complex topography, especially at the lee side of Central Mountain Range. When the wind coming from the northeast reaches the land, the terrain influences the wind field and causes the wind field changes at the lee side of the central mountain. The present study utilized the mesoscale numerical atmospheric simulation to explore the topographical barrier effect in the west region of Taiwan. The simulation results discover that the northeast monsoon is blocked by the northern and northeastern mountainous terrain. It caused the regional atmospheric pressure fluctuated and the pressure fluctuation prompted the regional wind field changed. When the continental anticyclone is approaching Taiwan from the north, the highest wind speed along the western coast of Taiwan occurs near the offshore of Miaoli; When the continental anticyclone covers Taiwan, the wind direction changes from north to the northeast in the northern ocean of Taiwan, and the highest wind speed along the western coast takes place by the offshore of Taichung; After the continental anticyclone passes Taiwan, the wind direction at the eastern and northern ocean of Taiwan turns east and the highest wind speed happens on the northwest coast. The simulation results show that the main reason for the regional wind field change is the atmospheric pressure fluctuation that is caused by the topographical barrier effect.
Keywords
WRF Numerical Simulation Model, Northeast Monsoon, Topographical Barrier Effect.