曾文水庫流域氣象雷達加強觀測計畫

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Title:	曾文水庫流域氣象雷達加強觀測計畫
Authors:	陳台琦
Contributors:	大氣物理研究所
Keywords:	劇烈天氣;移動式雷達氣象觀測;曾文水庫流域;Doppler;Team-R;研究領域：大氣科學類
Date:	2012-02-01
Issue Date:	2012-06-08 15:53:37 (UTC+8)
Publisher:	交通部中央氣象局
Abstract:	曾文水庫流域在5至6月的梅雨鋒面及7至9月的颱風侵襲下，此區常有豪大雨的發生，在現有的氣象局雷達網及雨量計網的覆蓋下，此區因地形的阻擋使雷達觀測資料缺乏或遭受污染，降雨估計困難，並且山區地形崎嶇使雨量站架設不易，雨量資料缺乏，使區域雨量估計與水庫實際進水量有相當大的差異。因此本年的計畫則擬於此類天氣現象，以移動式偏極化/都卜勒雷達 TEAM-R(3公分)前往曾文水庫流域找尋適當的站址與氣象局七股雷達(10公分)進行聯合加強觀測，提升此區定量降水估計能力。持續測試調整分辨地形回波策略，找尋最佳的去除地形的作業方式，提升雷達資料品質，改善降水估計精確度，並與實際觀測做校驗。本計畫目的為評估曾文水庫流域氣象雷達加強觀測之效益。 Heavy rainfall events often occur in the Tseng-Wen Reservoir watershed during Mei-yu fronts from May to June and typhoons from July to September. The existing Central Weather Bureau (CWB) Doppler radar and rain gauge network doesn’t cover this region well because of terrain blockage. Insufficient or contaminated radar observations lead to difficulties in rainfall estimation, and insufficient rain gauge observations result in considerable difference between regional rainfall estimation and the actual amount of the water reservoir intake. Therefore, this project plans to deploy the mobile dual-polarization Doppler radar, TEAM-R, in the Tseng-Wen Reservoir watershed for synchronized observations with CWB Cigu Radar. The goal is to enhance the ability of quantitative precipitation estimation in this region. The strategy of terrain echo distinguishment will be tuned to optimize terrain echo removal. Additional jobs include upgrading the radar data quality, improving the accuracy of rainfall estimation and calibration with in situ rainfall measurements. In general, this project aims at the benefit assessment of the weather radar observations in the Tseng-Wen Reservoir watershed. 研究期間：10102 ~ 10112
Relation:	財團法人國家實驗研究院科技政策研究與資訊中心
Appears in Collections:	[Department of Atmospheric Sciences and Graduate Institute of Atmospheric Physics ] Research Project

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