本篇論文使用SoWMEX 2008 年NCAR(National Center of Atmospheric Research)SPOL雷達折射率(N)資料與台灣西南部氣象站的溫度、氣壓反演得到二維水平近地面的水氣壓(e)與相對溼度(RH)來討論 6月 14 日(IOP8)的水氣分布以及其與對流發展、移動之關係。
比較高雄測站與繁華自動氣象觀測站，折射率反演的相對濕度與實際觀測的相對濕度有相當好的一致性，因此本研究進一步利用客觀分析方法將氣象站的氣壓與溫度場內插至網格點上，並配合雷達觀測的折射率反演得到近地面的水氣壓與相對濕度場。由於目前傳統濕度量測的缺乏，本研究藉由折射率反演水氣分布，討論濕度場與回波場的變化關係，增加水氣與降水系統交互作用之了解。

The major goal of this research is to understand the relationship between low-level moisture derived from radar refractivity and precipitation in a frontal system during SoWMEX/TiMREX 2008 IOP8.
Low-level horizontal moisture fields are obtained from the near-surface refractivity retrieved from NCAR SPOL radar and the temperature and pressure data from surface stations. The newly obtained moisture fields are verified and show consistency with the surface observations at KaoHsiung and FenHua stations. In this study, the retrieved horizontal distributions of water vapor pressure and relative humidity fields during 00 to 12 UTC on June 14 are illustrated and compared with radar reflectivity fields in order to study the relationship between moisture evolution and convections.