大气逆辐射

中国大气逆辐射的气候计算及其分布特征

Climatological Calculation of downward atmospheric radiation for China and its characteristic distribution

最后，文中还就大气逆辐射和有效辐射的年变化问题作了讨论。

Finally , discussion is done of the yearly variation of both the radiation .

大气逆辐射在东北冷区最明显，在黄土高原区最弱；地表长波辐射在西北干旱区最强而在东北冷区最弱。

The downward long-wave radiation is strongest in the cold region and weakest in the Loess Plateau while the upward long-wave radiation is obvious in the arid region and weak in the cold region .

本文在讨论并验证大气逆辐射和地表有效辐射计算方法的基础上，计算并分析了两者在青藏高原及其周围地区的气候特征。

On the basis of discussion and verification of the calculation methods for downward atmospheric radiation and surface effective radiation , computation and analysis are done of their climatic features in the Plateau and surroundings .

上述各分量均表现有程度不等的季节变化规律：总辐射、大气逆辐射、地表长波辐射和地表辐射平衡均表现为夏半年增大达到最大值百而冬半年降低量出现最小值；

The seasonal variations of these parameters are different : for total radiation , downward longwave radiation , upward longwave radiation and net radiation , the maximums are in summer and the minimums are in winter .

结果表明，大气逆辐射和有效辐射的分布形势与高原地形有很大的一致性，高原主体分别为大气逆辐射的低中心和有效辐射的高中心。

Results show that their patterns bear close conformity with the topography . The main body of the Plateau represents the low - ( high - ) value center for downward atmospheric ( effective ) radiation .

同时烟雾层使到达兰州地面的大气逆辐射比南山顶增加5.2%，总的入射辐射比南山顶小5.6%，地面辐射差额比南山顶小67.8%。

The smog layer causes the counter radiation reaching Lanzhou surface 5.2 % more than that of the South-mountain , total incoming radiation is 5 . 6 % less than that of the South-mountain , and surface radiation balance is 67 . 8 % less than that of the South-mountain .

而大气向下逆辐射的日变化较地面向上长波辐射和地面净辐射的复杂，这与高原地区云的复杂变化有关；

The diurnal variation of atmospheric downward long wave radiation and the surface net radiation , this is related to a complex variation of cloud over Qinghai Xizang Plateau region .