中国大气向下辐射的气候学研究

CLIMATOLOGICAL STUDY ON DOWNWARD ATMOSPHERIC RADIATION IN CHINA

摘要:

通过多种方案试验,得出适用于各种云量下各大气等压面高度大气向下辐射的计算式为G_p=σT⁴[0.536+0.128ln(1+e)]云的影响主要通过各层气温和水汽压的相应变化体现。经检验该式的相对拟合误差为6.3%。据此计算并讨论了全国104个探空站500hPa等压面高度及对流层下层(地面—500hPa)大气向下辐射的时空分布特征。.

关键词:中国;大气向下辐射;气候计算

Abstract:

In terms of a few experimental schemes,an expression for downward atmospheric radiation form various isobaric levels under a range of cloudiness is developed in the formG_p=σT⁴[0.536+0.128ln(1+e)]The effects of cloudiness are represented mainly by the corresponding change of temperature and vapor pressure at the related levels. Verification shows that the expression has a 6.3% relative fitting error,and thereby the spatial and temporal pattern of the downward radiation is investigated at 500hPa and in the lower troposphere (500hPa to the ground) by use of the data from 104 radiosonde stations throughout the country.

Key words:China;downward atmospheric radiation;climatological calculation