摘要
利用南京市气象局在江宁布设的激光雨滴谱仪、称重式雨量计和翻斗式雨量计,整理2014-2018年期间2590h的降水观测资料,重点分析了Parsivel激光雨滴谱仪对降雨和降雪的测量性能。结果表明,与称重式雨量计结果相比,翻斗式雨量计测量的降水时数和累积降水量均偏低,激光雨滴谱仪测量的降雨时数偏低,但累计降水量偏高15.07%;激光雨滴谱仪能够有效跟踪降水强度的变化,但在雨强较小(<2.5mm·h^-1)时对雨强略有低估,在降雨强度较大(≥2.5mm·h^-1)时对雨强有不同程度的高估,最大可达近50%,而且雨强越大,一致性就越差;翻斗式雨量计无法有效测量降雪;激光雨滴谱仪则可以有效跟踪降雪的变化情况,但是受到测量原理的限制,对等效降水强度则有不同程度的高估。从5年数据来看,没有发现随着激光雨滴谱仪安装时间的增长,性能变差的问题。
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).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.
作者
吴宜
刘西川
张军
胡鹏
WU Yi;LIU Xichuan;ZHANG Jun;HU Peng(Nanjing Meteorological Observation Center,Nanjing 210009;College of Meteorology and Oceanography,National University of Defense Technology,Nanjing 211101;Meteorology Station,Unit 94655 of PLA,Wuhu 241007)
出处
《气象科技》
2020年第2期147-153,共7页
Meteorological Science and Technology
基金
南京市气象局自立科研项目(NJ201907)
国家自然科学基金项目(41327003)资助。
