摘要
英国学者H.L.彭曼推导的计算潜在蒸发公式,具有较可靠的物理基础和较精确的计算等优点,被国内、外学者广泛应用。彭曼公式E_(0)=(δR_(n)/L+γE_(α))/(δ+γ)(1)式中E_(0)为下垫面的潜在蒸发;R_(n)为辐射平衡(J/(cm^(2)·d)),化为蒸发相当量(取值245.346J/cm^(3)=1mm蒸发量);E_(α)为空气干燥力(mm/d);δ为气温等于T_(α)时饱和水汽压曲线的斜率;γ为干湿表常数(δ和γ单位为hPa/℃)。
Based on regional maximun radiation of clear day and the relation to sunshine percentage of China,this paper presented the method for altitudinalcorrection of Q_(A)(0.18+0.55 n/N)(1-R)in Penman formula.It was corrected,as Q_(oi)(0.248+0.752 n/N)(1-R).
作者
王菱
陈沈斌
侯光良
Wang Ling;Chen Shenbin;Hou Guangliang(Commission for Integrated Survey of Natural Resources,The Chinese Academy of Sciences)
出处
《气象学报》
1988年第3期381-383,共3页
Acta Meteorologica Sinica
