雨滴譜式降水現象儀與人工觀測結果的一致性分析
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國家自然科學基金項目(41975030、41327003)和南京市氣象局自立科研項目(NJ201907)共同資助


Consistency Analysis of Raindrop-Spectrum Precipitation Phenomenon Sensor and Manual Observation Results
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    摘要:

    為驗證雨滴譜式降水現象儀的測量性能,利用南京市氣象局在江寧布設的PARSIVEL型雨滴譜式降水現象儀2018年1—11月期間的天氣現象觀測資料,重點分析了雨滴譜式降水現象儀對不同類型降水的測量性能。結果表明:①總體而言,雨滴譜式降水現象儀與人工觀測具有良好的一致性,但是在降水時間、降水類型方面存在一定差異。②白天,人工觀測的總降水時間明顯高于儀器觀測結果,主要原因在于人工觀測有時會忽略降水間隙,而儀器可能會漏掉極微量降雨;人工觀測的降水現象分類較粗,有時會忽略降水的精細變化,而儀器能夠靈敏檢測到降雨的短時變化、毛毛雨和雨的轉換、降雨和降雪的轉換等。③夜間,人工觀測有時會忽略個別時次的毛毛雨或雨,而儀器容易漏測微量降水,大雨強條件下有時會把降雨誤判為霰或雪,降水現象的判別算法仍需改進。

    Abstract:

    In order to verify the performance of the raindropspectrum precipitation phenomenon sensor, the PARSIVEL raindropspectrum precipitation phenomenon sensor deployed at Jiangning by the Nanjing Meteorological Service is used to collate the observation data of weather phenomena from January to November 2018, and the performance of the sensor for different types of precipitation is analyzed. The conclusions are as follows: (1) The raindropspectrum precipitation phenomenon sensor has good consistency with manual observations in general, but there are some differences in precipitation duration and precipitation types. (2) In the daytime, the total precipitation duration of manual observation is obviously higher than that of the sensor, and the main reason is that manual observation might ignore the time between precipitation events, while the sensor might miss very light precipitation; the precipitation classification of manual observation is rough, and the fine changes of precipitation may be neglected, while the sensor is able to detect the shortterm changes in rainfall, the conversion of drizzle and rainfall, the conversion of rainfall and snow, etc. (3) At night, the manual observation may ignore a certain drizzle or rainfall, whereas the sensor tends to miss the light rainfall, and rains might be misjudged as graupels or snowfall. Therefore, the algorithm for classifying precipitation still needs to be improved.

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吳宜,劉西川,孫宇,張軍.雨滴譜式降水現象儀與人工觀測結果的一致性分析[J].氣象科技,2021,49(1):32~39

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  • 收稿日期:2020-03-03
  • 定稿日期:2020-11-18
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  • 在線發布日期: 2021-03-04
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