用地面湿度参量计算我国整层大气可降水量及有效水汽含量方法的研究

根据1993年我国28个台站地面及高空气象要素资料,拟合出这28个台站所在地区整层大气可降水量同地面湿度参量(地面水汽压、地面露点)关系的经验表达式,并且在此基础上,通过引进地理纬度ψ和海拔高度H两个参量,将经验系数参数化,建立起由地面湿度参量计算整层大气可降水量的经验计算模式.另外还拟合出这些地区整层大气有效水汽含量同可降水量关系的经验表达式,提出一个先由地面湿度参量计算整层大气可降水量,再由此计算出整层大气有效水汽含量的方法.

A Method for Estimating Precipitable Water and Effective Water Vapor Content from Ground Humidity Parameters

Based on the 1993 ground and radiosonde data of 28 stations in China, some empirical equations about the relation between precipitable water and ground humidity parameters for the 28 sta-tions included in this study are derived; and based on these results and by introducing two parameters, latitude , and height H, to the empirical coefficient parametric equations, an empirical model for esti-mating precipitable water by using ground humidity parameters is developed in this paper. Besides, some empirical equations about the relation between column effective water vapor content and precipitable water for these 28 stations are also derived, and a method for estimating effective water va-por content by using precipitable water obtained from ground humidity parameters is proposed.