摘要
本文整理了3种计算露点温度的方法,分别为利用干球温度和相对湿度直接计算,利用干球温度、相对湿度和环境水汽压间接计算,用干球温度、湿球温度和大气压计算,并以长春、西安、武汉和广州地区代表站为例,将前两种计算露点温度方法的结果与实际观测的露点温度进行对比分析。结果表明:露点温度的直接法与间接法均有其优点,当干球温度为0.0—30.0℃且相对湿度为40%—100%时,直接法计算的露点温度与实际观测露点温度的误差主要集中在0.5℃以内,适用于温度高且相对湿度较大的地区;间接法计算的露点温度精度较高,与实际观测露点温度的误差在0.2℃以内,具有一定的推广意义。
This article introduced three methods for calculating dew-point temperature. The three methods include calculating dew-point temperature directly through the formula with dry-bulb temperature and relative humidity,calculating dew-point temperature indirectly through the formula with dry-bulb temperature, relative humidity,and environmental vapor pressure,and calculating dew-point temperature through the formula with dry bulb temperature,wet bulb temperature,and atmospheric pressure. This study analyzed the deviations between estimated dewpoint temperature and observed dew-point temperature in Changchun,Xi＇an,Wuhan,and Guangzhou. The results show that the direct and indirect calculating methods both have their merits. The error of the direct calculating method for estimating the dew-point temperature is within 0. 5 ℃ when dry bulb temperature is between 0. 0 ℃and30. 0 ℃ and relative humidity is between 40% and 100%. The direct calculating method is suitable for areas with higher temperature and relative humidity. Comparatively, the indirect calculating method for estimating the dew point temperature has a higher accuracy and the error is within 0. 2 ℃, so this method can be applied in the future.
出处
《气象与环境学报》
2016年第3期107-111,共5页
Journal of Meteorology and Environment
基金
"十二五"国家科技支撑计划课题"可再生能源建筑应用与建筑节能设计数据库研发"(2014BAJ01B01)和"气候变化下的建筑节能设计基础气象参数及应用研究"(2010100106)共同资助
关键词
干球温度
湿球温度
相对湿度
环境水汽压
确定性系数
Dry-bulb temperature
Wet-bulb temperature
Relative humidity
Environmental vapor pressure
Coefficient of determination
