雷射雲冪儀應用於台灣各種地貌之混合層高度量測

環境工程應用上常以Holtzworth 方法推估混合層高度，據此台灣常利用中央氣象局板橋探空站和空軍屏東機場探空站每日00 UTC 和12 UTC 施放的無線電探空資料，配合當地氣溫推估混合層高度。然而台灣無線電探空儀施放時間，剛好是當地大氣邊界層日夜交替過渡期。學術界在實驗計畫中應用繫留氣球，或聲波雷達及氣膠光達等遙測儀器短期觀測大氣邊界層，僅能作為邊界層模式模擬、驗證的參考，無法提供長期性邊界層的連續觀測資料。本研究首先使用較低階Vaisala CL31 雲冪儀光達(CeilometerLidar)與一部較高階的氣膠光達(Aerosol Lidar)進行同地、同步觀測比較，以驗證CL31 硬體性能；然後再進行CL31 與板橋探空站無線電探空儀冬夏季節2 個月同步觀測比較實驗，以確認CL31 對混合層高度反演的可用性；最後於2013～2015 年期間，將CL31 分別在台灣不同的城市、郊區、海濱與山區作短期觀測，反演不同地貌在晴空和多雲天氣下混合層高度的日夜發展。結果顯示，透過各機場現有雲冪儀來建構台灣常態與連續性的混合層高度觀測網是可行的。

關鍵字

混合層高度；無線電探空儀；雲冪儀光達

並列摘要

In order to get estimation of mixing layer height in the atmospheric boundary layer in Taiwan, the environmental engineering people always use the solution of Holtzworth method which needs the radiosonde data and local air temperature for input. Unfortunately, Radiosonde is released at Banchiao station of Central Weather Bureau and Pingtung airport station operated by Air Force twice a day during the transition period (08:00 LST and 20:00 LST) of atmospheric boundary layer at Taiwan. Tethered balloon, acoustic sounder and aerosol Lidar were used for providing major validation source on numerical model boundary layer simulation. But they were only operated for short-term research missions. In this study, a cheaper Vaisala CL31 ceilometer was compared with another advanced aerosol Lidar for performance check. Then 2-monthly intercomparison data with radiosonde at Banchiao station in summer and winter season was collected to validate the algorithm of mixing layer height (MLH) detection. Finally, the MLH of clear sky and cloudy weathers derived from CL31 ceilometer at different landscape (city, urban, coast and mountain regions) in Taiwan under was analyzed. We believe an operation and continuous monitor network on atmospheric boundary layer with existed airports ceilometer is expected.

並列關鍵字

Mixing Height ； Radiosonde ； Lidar Ceilometer

國際替代計量

雷射雲冪儀應用於台灣各種地貌之混合層高度量測

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