青藏高原云对地气系统长波射出辐射(OLR)强迫的气候研究

Climatology of Earth-Atmosphere System Outgoing Longwave Cloud-Radiative Forcing over Tibetan Plateau

利用地球辐射平衡试验 ( ERBE)和国际卫星云气候计划 ( ISCCP)提供的地气系统长波射出辐射 ( OLR)和云量资料 ,计算并讨论了青藏高原地气系统各季和年平均总云量对 OL R的强迫及其所产生的温室效应 ,揭示了高、低云对 OLR强迫的特点。结果表明 :高原的 OL R云强迫与总云量、高云量都有较好的相关关系 ,且季节变化明显 ;OL R云强迫和云温室效应的地理分布与高原总云量的分布较为一致 ;云强迫的年变化一般以春季最大 ,冬。

In terms of data on radiation and cloudiness from ERBE and ISCCP, outgoing longwave cloud radiative forcing (LWCRF) and cloud greenhouse effect (CGE) are investigated on seasonal and annual bases over the Tibetan Plateau.Results show that a good power law correlation exists between LWCRF and either total or high cloudiness. The LWCRF changes seasonally and has a geographical distribution similar to that of total cloudiness, its value being higher in spring and lower in winter or autumn.