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題 名 | 海上大氣導管個案數值模擬研究--WRF邊界層參數法之可預報度分析=A Case Study of the Numerical Simulation of the Atmospheric Duct over the Sea--The Predictability for the Boundary Parameterization of the WRF Model |
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作 者 | 林彥岑; 汪建良; 朱昌敏; | 書刊名 | 氣象預報與分析 |
卷 期 | 192 2007.09[民96.09] |
頁 次 | 頁1-14 |
分類號 | 328.2 |
關鍵詞 | 大氣導管; 高空導管; 蒸發導管; WRF模式; Atmospheric duct; Elevated duct; Evaporation duct; WRF model; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究主要以2004年7月29日至8月5日臺灣東南部海上觀測實驗之「船舶及海上探空觀測」資料,運用美國海軍之大氣折射效應預報系統(Advanced Refractive Effects Prediction System, AREPS)進行導管分析。此外,採用WRF模式(Weather Research and Forcast model)進行數值模擬,與實驗結果進行比對。 實驗期間臺灣地區受太平洋高壓壟罩之天氣型態影響,伴隨微弱之下沉氣流抑制垂直混合而導致低層折射率增加。本研究結果,WRF模式對近地層的大氣結構具模擬能力,經可預報度測試結果,模式模擬表現維持相當之穩定度。對高空導管模擬所著重的邊界層中層表現,以YSU為最佳選項。另外,在蒸發導管模擬所著重的邊界層低層表現,以MRF為最佳選項。邊界層參數法整體表現以MRF參數法為佳。 |
英文摘要 | The data observed over the sea area southeast of Taiwan from July 29 to August 5, 2004 are used and AREPS (Advanced Refractive Effects Prediction System) of U.S. Navel is implemented to analyze the characteristics of the evaporation ducts. The WRF (Weather Research and Forcast model) mode is then used to simulate the atmospheric environment of the ducts for comparison. During the observation period, the weather was affected by the Pacific Ocean High. The vertical mixing was suppressed by descents and the low-level refractive index was then increased. The predictability tests of this study indicate that the WRF Model has the ability to simulate the atmospheric structure near the sea surface. The stability of simulation was well maintained. For the simulation of the elevated ducts, the best boundary layer scheme is the YSU scheme. For the simulation of the evaporation ducts in the lower boundary, the best one is the MRF scheme. For the overall performance of the boundary layer scheme, the MRF scheme has the best results. WRF Model has the ability to predict the elevated and evaporation ducts for 12 and 32 hours, respectively. |
本系統中英文摘要資訊取自各篇刊載內容。