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專題討論

專題討論. (Seminar). 授課老師 : 游政谷. Seminar(3). Seeder-feeder mechanism 種雲播雲機制. 高雲 (seeder cloud). 低雲 (feeder cloud). 2. Upslope condensation ( 上坡風凝結機制 ). Low-level PPI of radar reflectivity. Orographic Rainband(OR) --- Quasi-stationary --- Orientation closely linked to the terrain feature

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專題討論

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  1. 專題討論 (Seminar) 授課老師: 游政谷 Seminar(3)

  2. Seeder-feeder mechanism • 種雲播雲機制 高雲(seeder cloud) 低雲 (feeder cloud)

  3. 2. Upslope condensation (上坡風凝結機制)

  4. Low-level PPI of radar reflectivity Orographic Rainband(OR) --- Quasi-stationary --- Orientation closely linked to the terrain feature Typhoon Rainband(TR) --- Fast movement --- Curved feature dBZ

  5. 3. Upslope triggering (上坡風激發機制)

  6. 4.25 km Dual-Doppler Analysis 0720 UTC SCT UT NCFR

  7. UT UT NCFR

  8. 4. Upstream triggering (上游減速激發機制)

  9. 鋒前西南氣流受地形阻礙影響轉成偏南風 (Yu and Smull 2000)

  10. Contours of cross-barrier flow component

  11. 5. Thermal triggering (熱力激發機制)

  12. 中午時刻在山脊附近發展的積雲 (攝於宜蘭省道,雪山山脈南側)

  13. 6. Lee-side triggering (背風面激發機制)

  14. 在較小的Froude number環境下, 美國華盛頓州奧林匹克山背風面之輻合 (Mass 1981)

  15. 7. Lee-side enhancement by gravity waves (透過重力波在背風面的加強機制)

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