根据2007-2008年内蒙古西部呼和浩特站,二连浩特站逐日08时地面及探空气象观测资料,计算得出两个站点全年水汽总量与地面水汽压值,对水汽总量与地面水汽压的特征及其关系进行了分析.在此基础上利用最小二乘原理对水汽总量与地面水汽压进行了回归分析,分别建立了两站的W-e回归方程,并对回归方程进行了检验.结果表明:水汽总量与地面水汽压之间存在着良好的线性关系,得出的W-e回归方程相关系数均趋近于1,拟合程度较高.此回归方程为不具有探空条件的气象站点提供了利用地面水汽压计算水汽总量的简便方法,具有良好的实际应用价值.%According to the surface and radiosonde data at 08LST everyday from 2007 to 2008 in Huhhot and Erenhot of western Inner Mongolia, the annual precipitable water vapor and surface vapor pressure in the two station are calculated; the characteristics of precipitable water vapor and surface vapor pressure and their relationship are analyzed. Based on this, the regression analysis of precipitable water vapor and surface vapor pressure is carried out used the least-squares principle. By doing this, the W-e regression equations of the two stations are set up respectively ; and the regression equation was tested. The results showed that the precipitable water vapor and surface vapor pressure has good linear relationship and the relative coefficients derived from regression correlation are close to 1 with a higher fitting degree. This regression equation offers an easy way to calculate precipitable water vapor by means of surface vapor pressure for the stations without Sounding conditions, so it has great practical value.
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