PRECIPITABLE WATER MEASUREMENTS WITH SUN-PHOTOMETER  

作　　者：韩接才 周军 王志恩 胡欢陵 

机构地区：[1]Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences.Hefei 230031

出　　处：《Acta meteorologica Sinica》1997年第1期95-104,共10页

摘　　要：In this paper a method is described of retrieving precipitable water from sun-photometer measurements.The quantitative relationship between water vapor transmission and precipitable water is established by means of LOWTRAN 7 model.Calibration of the water vapor absorption channel is made through a modified Langley method.The good agreement between the sun- photometer and radiosonde water vapor retrieval indicates that this method is feasible. The sun-photometer is operated at Hefei to monitor the precipitable water within one year period.Characteristics of both diurnal evolution and within-one-year variation of the precipitable water and their relation with synoptic system as well as surface dew-point temperature are presented and analyzed.Errors in the retrieved precipitable water from the sun-photometer measurements are also calculated and discussed.In this paper a method is described of retrieving precipitable water from sun-photometer measurements.The quantitative relationship between water vapor transmission and precipitable water is established by means of LOWTRAN 7 model.Calibration of the water vapor absorption channel is made through a modified Langley method.The good agreement between the sun- photometer and radiosonde water vapor retrieval indicates that this method is feasible. The sun-photometer is operated at Hefei to monitor the precipitable water within one year period.Characteristics of both diurnal evolution and within-one-year variation of the precipitable water and their relation with synoptic system as well as surface dew-point temperature are presented and analyzed.Errors in the retrieved precipitable water from the sun-photometer measurements are also calculated and discussed.

关 键 词：water vapor precipitable water solar radiometry 

分 类 号：P426.1[天文地球—大气科学及气象学]