Parsivel激光雨滴譜儀與雨量計觀測降水的一致性分析
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南京市氣象局自立科研項目(NJ201907)和國家自然科學基金項目(41327003)資助


Consistency Analysis of Precipitation Observed by Parsivel Laser Disdrometer and Rain Gauges
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    摘要:

    利用南京市氣象局在江寧布設的激光雨滴譜儀、稱重式雨量計和翻斗式雨量計,整理2014—2018年期間2590 h的降水觀測資料,重點分析了Parsivel激光雨滴譜儀對降雨和降雪的測量性能。結果表明,與稱重式雨量計結果相比,翻斗式雨量計測量的降水時數和累積降水量均偏低,激光雨滴譜儀測量的降雨時數偏低,但累計降水量偏高15.07%;激光雨滴譜儀能夠有效跟蹤降水強度的變化,但在雨強較小(<2.5 mm〖DK〗·h-1)時對雨強略有低估,在降雨強度較大(≥2.5 mm〖DK〗·h-1)時對雨強有不同程度的高估,最大可達近50%,而且雨強越大,一致性就越差;翻斗式雨量計無法有效測量降雪;激光雨滴譜儀則可以有效跟蹤降雪的變化情況,但是受到測量原理的限制,對等效降水強度則有不同程度的高估。從5年數據來看,沒有發現隨著激光雨滴譜儀安裝時間的增長,性能變差的問題。

    Abstract:

    The rainfall observation data of 2590 hours from the Parsivel laser disdrometers, tipping bucket rain gauges, and weighing rain gauges of Nanjing Meteorological Service in Jiangning Station during 2014-2018 are collected, and the performance of the Parsivel laser disdrometer for rainfall and snowfall measurement is discussed. The results show that compared with the results of the weighing rain gauge, both rainfall duration and total accumulated rainfall measured by the tipping rain gauge are lower, while the rainfall duration measured by the laser disdrometer is lower, but the total accumulated rainfall is 15.07% higher. The laser disdrometer can track the change of rain intensity effectively, but the rain intensity tends to be underestimated when the rain is light (<2.5 mm h-1), and overestimated for different degrees when the rain is heavy (≥2.5 mmm h-1). 〖JP2〗The tipping bucket rain gauge is unable to measure snowfall effectively, while the laser disdrometer can monitor the change of snowfall effectively, but it overestimates the equivalent precipitation intensity due to its limitation of measurement principle.The performance of laser disdrometer did not deteriorate with the increase of installation time from the data of 5 years.〖JP〗

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吳宜,劉西川,張軍,胡鵬. Parsivel激光雨滴譜儀與雨量計觀測降水的一致性分析[J].氣象科技,2020,48(2):147~153

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  • 收稿日期:2019-04-17
  • 定稿日期:2019-05-14
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  • 在線發布日期: 2020-04-29
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