【摘要】 MP-3000A是一种新型大气探测仪器,可以连续得到从地面到10 km高度上高分辨率的温度、相对湿度、水汽廓线以及液态水廓线。通过选取2011年5月1日的微波辐射计观测数据,分析在降水发生前后的水汽密度和液态水含量的变化,发现大气降水与水汽密度和液态水含量有很紧密的联系。大气中的可降水量一般会维持在25 mm,当大气中的可降水量值超过50 mm,液态水含量值开始增加的时候,发生降水的可能性增大;降水过后,液态水含量若是没有回落到0.0 mm以内,在未来的2～3 h内还是会发生降水,因此研究微波辐射计探测的大气水汽密度和液态水含量,将有助于提高短时、临近预报的准确度。更多还原

【Abstract】 As a new type of atmospheric detecting instrument,the Microwave Radiometer MP-3000A is capable of detecting temperature,relative humidity and water vapor and liquid water profile with high resolution from ground to 10 km altitude.Based on the Microwave Radiometer observation data on May 1,2011,this paper presents the variation of vapor density and liquid water content before and after the precipitation.The findings show that precipitation was closely correlated with water vapor density and liquid water content.And atmospheric precipitable water generally remained 25mm.The possibility of precipitation increases when atmospheric precipitable water value was over 50mm and liquid water content increases significantly.Precipitation happened within two to three hours when liquid water content did not fall back to 0.0mm after precipitation.Therefore,the study of atmospheric water vapor density and liquid water content detected by microwave radiometer will help improve the precision of short-term forecasting and nowcasting.更多还原