Parsivel激光雨滴譜儀觀測較強降水的可行性分析和建議

doi:10.3969/2012jms.0184

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Parsivel激光雨滴譜儀觀測較強降水的可行性分析和建議
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                        10.3969/2012jms.0184
                    
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基金項目:國家重點基礎(chǔ)研究發(fā)展計劃（973計劃）項目（2010CD950804）

Feasibility analyses and recommendations of Parsivel optical distrometer in measurements of strong precipitation

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為了研究OTT-Parsivel激光雨滴譜儀（簡稱Parsivel）在較強降水觀測中應(yīng)用的可行性，用南京地區(qū)2012年6—7月份4個典型的降水個例，對Parsivel和SL3-1翻斗式雨量計（簡稱雨量計）的累積降水量、降水強度觀測資料進行對比分析，并與人工雨量筒觀測作以比較。結(jié)果表明：Parsivel測值是可信的，在累積降水量觀測上，與雨量計具有很好的相關(guān)性，但測值始終偏高，該現(xiàn)象主要是粒子相互遮擋造成的。雨量計的反應(yīng)時間，明顯滯后于Parsivel。雨量計測值接近人工測值；而Parsivel與人工測值的偏差明顯大于雨量計。結(jié)合實驗分析與業(yè)務(wù)應(yīng)用，提出3點使用建議：（1）儀器應(yīng)架設(shè)在無遮蔽物的開闊地帶。（2）采樣周期應(yīng)隨著降水強度（地理位置）的不同而改變。（3）對降水微物理參量特征以及粒子譜分析時，可剔除直徑過大、速度很低的粒子。

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In order to study the performance of the optical disdrometer Parsivel in strong precipitation, this article compares three kinds of rain equipment including Parsivel, SL3-1 tipping bucket rain gauge and traditional rain gauge based on 4 typical rain events during June and July 2012 in Nanjing. The result shows: The value measured by Parsivel is credible, a good linear correlation and consistency exit between Parsivel and tipping bucket rain gauge in terms of accumulated precipitation, Parsivel gives higher accumulated data systematically than the latter. We suggest that the reason is the mutual occlusions of small particles; the precipitation starting time measured by rain gauge lags behind that by PARSIVEL; the rain gauge is very close to the measured value of the artificial observations, thus the instrumental deviation from Parsivel is significantly greater than the rain gauge. In addition, we propose the following three points during using Parsivel: (1) Parsivel should be set up in the open area without shelter in order to avoid particle deformation. (2)Parsivel's sampling period should be changed with the different precipitation intensity. (3) It is necessary to neglect those particles which are too large and too slow to analyse precipitation microphysical parameters' characteristics and the particle spectrum correctly.

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胡子浩,濮江平,張歡,張小鵬. Parsivel激光雨滴譜儀觀測較強降水的可行性分析和建議.氣象科學(xué),2014,34(1):25-31 HU Zihao, PU Jiangping, ZHANG Huan, ZHANG Xiaopeng. Feasibility analyses and recommendations of Parsivel optical distrometer in measurements of strong precipitation. Journal of the Meteorological Sciences,2014,34(1):25-31

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收稿日期:2012-11-03
最后修改日期:2012-12-11
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在線發(fā)布日期: 2014-02-21
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