【摘要】 降水观测资料的准确性对气候、气象及水文研究至关重要,因此2005-2011年在青藏高原唐古拉山中段开展了中国标准雨量计(CSPG)和Geonor T-200B自动雨雪量计(下称T-200B)的降水对比观测试验,以CSPG人工观测的日降水修正值作为真实的日降水量,通过数学统计分析,提出T200B的固态、液态及混合态日降水修正公式,并对其进行验证。结果表明,T 200B日降水观测值经过修正后,与CSPG日降水修正值基本相符,试验时段三种降水类型的降水总量的T-200B修正值与CSPG修正之间的平均相对误差为2.3%,平均绝对误差为13.7 mm,该修正方案提高了T 200B降水观测效率,修正精度能够满足实际应用需求。更多还原

【Abstract】 Accurate measurement of precipitation is crucial to meteorology,climate and hydrology research.A comparative precipitation observation of Chinese Standard Precipitation Gauge(CSPG) and the Geonor T —200B Gauge(T —200B) were conducted during 2005 —2011 in the middle of Tanggula Mountain,Qinghai-Xizang Plateau.The CSPG was calibrated to the observed daily precipitation by the developed standard equations.A bias correction method of precipitation for three precipitation patterns was developed and validated for T —200B Gauge.The results show that the adjusted value of T —200B is in accord with that of CSPG,the mean relative error between the adjusted accumulative precipitation of Geonor T —200B and that of CSPG is 2.3%,and the mean absolute error is 13.7 mm during observed period.The bias correction method improves the observation efficiency of T —200B significantly,and the accuracy can be enough for the practical application.更多还原